[Buildroot] [RFC PATCH 0/3] make: support: use `command -v' instead of `which' *second try*

[Buildroot] [RFC PATCH 0/3] make: support: use `command -v' instead of `which' *second try*

[Petr Vorel]

Hi all,

this is a second attempt to introduce command -v.

Changes v1->v2:
* reproduced original issue and fixed by not relying to
  $(shell command -v ...) but shell with:
  $(shell $(SHELL) -c "command -v ...").
* quote variables

Tested only with make defconfig && make help >/dev/null


Petr Vorel (3):
  make: support: use `command -v' instead of `which'
  make: Drop `type -p ...' fallback
  support/dependencies: don't check for `which'

 Makefile                                      | 22 +++++++++----------
 package/Makefile.in                           |  8 +++----
 support/dependencies/check-host-bison-flex.mk |  4 ++--
 support/dependencies/check-host-cmake.sh      |  2 +-
 support/dependencies/check-host-gzip.sh       |  2 +-
 support/dependencies/check-host-lzip.sh       |  4 ++--
 support/dependencies/check-host-python3.sh    |  2 +-
 support/dependencies/check-host-tar.sh        |  4 ++--
 support/dependencies/check-host-xzcat.sh      |  4 ++--
 support/dependencies/dependencies.sh          | 18 +++++++--------
 .../pkg-toolchain-external.mk                 |  2 +-
 11 files changed, 35 insertions(+), 37 deletions(-)

-- 
2.33.0

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[Buildroot] [RFC PATCH 1/3] make: support: use `command -v' instead of `which'

[Petr Vorel]

`which' has been discontinued after 2.21 release in 2015 due this (git
repository is empty [1]) and version shipped in Debian produces warning
[2]:

/usr/bin/which: this version of `which' is deprecated; use `command -v' in scripts instead.

`command is POSIX [3] and supported on all common shells (bash, zsh,
dash, busybox sh, mksh).

NOTE: originally merged as ca6a2907c2, but it had to be reverted due
errors [4] (originally reported [5]). Problems were:

1) Main problem was that make sometimes expected `command' as a
   binary/script and run it with execve() (or any other exec*()
   wrapper), instead of running it through a shell via system() [4]:

    $ make defconfig
    [...]
    $ make help
    make[1]: command: Command not found
    [...]

   Fixed by not relying to $(shell command -v ...) but shell with:
   $(shell $(SHELL) -c "command -v ...").

2) `command -v' handles only first parameter (unlike `which') [4].
   Hopefully fixed with quoting variables. Quoting variables is also
   needed, because both `command -v' without args and `type -p' exit 0.

Patch tested on both bash and dash as /bin/sh on various distros with
having different make versions, including these previously affected
(4.2.1, 4.0, 3.81).

[1] https://git.savannah.gnu.org/cgit/which.git
[2] https://salsa.debian.org/debian/debianutils/-/commit/3a8dd10b4502f7bae8fc6973c13ce23fc9da7efb
[3] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
[4] https://lore.kernel.org/buildroot/20210930200402.GO1504958@scaer/
[5] https://lore.kernel.org/buildroot/YVTIghzHs82uFBIe@pevik/T/#m95c17eb8374e4e3dd6eee700d397aa12cca0739e

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
 Makefile                                      | 22 +++++++++----------
 package/Makefile.in                           |  8 +++----
 support/dependencies/check-host-bison-flex.mk |  4 ++--
 support/dependencies/check-host-cmake.sh      |  2 +-
 support/dependencies/check-host-gzip.sh       |  2 +-
 support/dependencies/check-host-lzip.sh       |  4 ++--
 support/dependencies/check-host-python3.sh    |  2 +-
 support/dependencies/check-host-tar.sh        |  4 ++--
 support/dependencies/check-host-xzcat.sh      |  4 ++--
 support/dependencies/dependencies.sh          | 16 +++++++-------
 .../pkg-toolchain-external.mk                 |  2 +-
 11 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/Makefile b/Makefile
index c960b53a6d..2317655272 100644
--- a/Makefile
+++ b/Makefile
@@ -284,12 +284,12 @@ HOSTAS := as
 endif
 ifndef HOSTCC
 HOSTCC := gcc
-HOSTCC := $(shell which $(HOSTCC) || type -p $(HOSTCC) || echo gcc)
+HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p '$(HOSTCC)' || echo gcc")
 endif
 HOSTCC_NOCCACHE := $(HOSTCC)
 ifndef HOSTCXX
 HOSTCXX := g++
-HOSTCXX := $(shell which $(HOSTCXX) || type -p $(HOSTCXX) || echo g++)
+HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p '$(HOSTCXX)' || echo g++")
 endif
 HOSTCXX_NOCCACHE := $(HOSTCXX)
 ifndef HOSTCPP
@@ -310,15 +310,15 @@ endif
 ifndef HOSTRANLIB
 HOSTRANLIB := ranlib
 endif
-HOSTAR := $(shell which $(HOSTAR) || type -p $(HOSTAR) || echo ar)
-HOSTAS := $(shell which $(HOSTAS) || type -p $(HOSTAS) || echo as)
-HOSTCPP := $(shell which $(HOSTCPP) || type -p $(HOSTCPP) || echo cpp)
-HOSTLD := $(shell which $(HOSTLD) || type -p $(HOSTLD) || echo ld)
-HOSTLN := $(shell which $(HOSTLN) || type -p $(HOSTLN) || echo ln)
-HOSTNM := $(shell which $(HOSTNM) || type -p $(HOSTNM) || echo nm)
-HOSTOBJCOPY := $(shell which $(HOSTOBJCOPY) || type -p $(HOSTOBJCOPY) || echo objcopy)
-HOSTRANLIB := $(shell which $(HOSTRANLIB) || type -p $(HOSTRANLIB) || echo ranlib)
-SED := $(shell which sed || type -p sed) -i -e
+HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p '$(HOSTAR)' || echo ar")
+HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
+HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' || echo cpp")
+HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
+HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln")
+HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
+HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
+HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib")
+SED := $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e
 
 export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
 export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
diff --git a/package/Makefile.in b/package/Makefile.in
index 86db62ba5b..2ba4d8b381 100644
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -4,7 +4,7 @@ endif
 ifndef HOSTMAKE
 HOSTMAKE = $(MAKE)
 endif
-HOSTMAKE := $(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)
+HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")
 
 # If BR2_JLEVEL is 0, scale the maximum concurrency with the number of
 # CPUs. An additional job is used in order to keep processors busy
@@ -222,8 +222,8 @@ else
 TARGET_STRIP = /bin/true
 STRIPCMD = $(TARGET_STRIP)
 endif
-INSTALL := $(shell which install || type -p install)
-UNZIP := $(shell which unzip || type -p unzip) -q
+INSTALL := $(shell $(SHELL) -c "command -v install || type -p install")
+UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p unzip") -q
 
 APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH support/scripts/apply-patches.sh $(if $(QUIET),-s)
 
@@ -237,7 +237,7 @@ HOST_LDFLAGS  += -L$(HOST_DIR)/lib -Wl,-rpath,$(HOST_DIR)/lib
 # the path to the system perl, before a host-perl built by Buildroot
 # might get installed into $(HOST_DIR)/bin and therefore appears
 # in our PATH. This system perl will be used as INTLTOOL_PERL.
-export PERL=$(shell which perl)
+export PERL=$(shell $(SHELL) -c "command -v perl")
 
 # host-intltool needs libxml-parser-perl, which Buildroot installs in
 # $(HOST_DIR)/lib/perl, so we must make sure that the system perl
diff --git a/support/dependencies/check-host-bison-flex.mk b/support/dependencies/check-host-bison-flex.mk
index 14a232fd44..b6cec369f1 100644
--- a/support/dependencies/check-host-bison-flex.mk
+++ b/support/dependencies/check-host-bison-flex.mk
@@ -5,10 +5,10 @@
 # that runs on host, e.g. Kconfig. To build code for target use plain
 # host-{bison,flex}.
 
-ifeq ($(shell which bison 2>/dev/null),)
+ifeq ($(shell $(SHELL) -c "command -v bison 2>/dev/null"),)
 BR2_BISON_HOST_DEPENDENCY = host-bison
 endif
 
-ifeq ($(shell which flex 2>/dev/null),)
+ifeq ($(shell $(SHELL) -c "command -v flex 2>/dev/null"),)
 BR2_FLEX_HOST_DEPENDENCY = host-flex
 endif
diff --git a/support/dependencies/check-host-cmake.sh b/support/dependencies/check-host-cmake.sh
index fadeae9f6b..f202d72a98 100755
--- a/support/dependencies/check-host-cmake.sh
+++ b/support/dependencies/check-host-cmake.sh
@@ -11,7 +11,7 @@ shift
 for candidate; do
 
     # Try to locate the candidate. Discard it if not located.
-    cmake=`which "${candidate}" 2>/dev/null`
+    cmake=`command -v "${candidate}" 2>/dev/null`
     [ -n "${cmake}" ] || continue
 
     # Extract version X.Y from versions in the form X.Y or X.Y.Z
diff --git a/support/dependencies/check-host-gzip.sh b/support/dependencies/check-host-gzip.sh
index 5f344c5f9b..4dbce72676 100755
--- a/support/dependencies/check-host-gzip.sh
+++ b/support/dependencies/check-host-gzip.sh
@@ -2,7 +2,7 @@
 
 candidate="$1" # ignored
 
-gzip="$(which gzip)"
+gzip="$(command -v gzip)"
 if [ ! -x "${gzip}" ]; then
     # echo nothing: no suitable gzip found
     exit 1
diff --git a/support/dependencies/check-host-lzip.sh b/support/dependencies/check-host-lzip.sh
index 4f8a2ba3de..5cdfb8252a 100755
--- a/support/dependencies/check-host-lzip.sh
+++ b/support/dependencies/check-host-lzip.sh
@@ -2,9 +2,9 @@
 
 candidate="$1"
 
-lzip=`which $candidate 2>/dev/null`
+lzip=`command -v "$candidate" 2>/dev/null`
 if [ ! -x "$lzip" ]; then
-	lzip=`which lzip 2>/dev/null`
+	lzip=`command -v lzip 2>/dev/null`
 	if [ ! -x "$lzip" ]; then
 		# echo nothing: no suitable lzip found
 		exit 1
diff --git a/support/dependencies/check-host-python3.sh b/support/dependencies/check-host-python3.sh
index 17cafd2883..ca504da6ac 100755
--- a/support/dependencies/check-host-python3.sh
+++ b/support/dependencies/check-host-python3.sh
@@ -14,7 +14,7 @@ shift
 # a more recent version.
 
 for candidate in "${@}" ; do
-	python3=`which $candidate 2>/dev/null`
+	python3=`command -v "$candidate" 2>/dev/null`
 	if [ ! -x "$python3" ]; then
 		continue
 	fi
diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh
index b7d607a47a..0f0f80038d 100755
--- a/support/dependencies/check-host-tar.sh
+++ b/support/dependencies/check-host-tar.sh
@@ -2,9 +2,9 @@
 
 candidate="$1"
 
-tar=`which $candidate`
+tar=`command -v "$candidate"`
 if [ ! -x "$tar" ]; then
-	tar=`which tar`
+	tar=`command -v tar`
 	if [ ! -x "$tar" ]; then
 		# echo nothing: no suitable tar found
 		exit 1
diff --git a/support/dependencies/check-host-xzcat.sh b/support/dependencies/check-host-xzcat.sh
index 10f1c4562a..a022c64faf 100755
--- a/support/dependencies/check-host-xzcat.sh
+++ b/support/dependencies/check-host-xzcat.sh
@@ -2,9 +2,9 @@
 
 candidate="$1"
 
-xzcat=`which $candidate 2>/dev/null`
+xzcat=`command -v "$candidate" 2>/dev/null`
 if [ ! -x "$xzcat" ]; then
-	xzcat=`which xzcat 2>/dev/null`
+	xzcat=`command -v xzcat 2>/dev/null`
 	if [ ! -x "$xzcat" ]; then
 		# echo nothing: no suitable xzcat found
 		exit 1
diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index c604a9efcc..e720e9372e 100755
--- a/support/dependencies/dependencies.sh
+++ b/support/dependencies/dependencies.sh
@@ -58,7 +58,7 @@ fi
 check_prog_host()
 {
 	prog="$1"
-	if ! which $prog > /dev/null ; then
+	if ! command -v "$prog" > /dev/null ; then
 		echo >&2
 		echo "You must install '$prog' on your build machine" >&2
 		exit 1
@@ -75,7 +75,7 @@ check_prog_host "sed"
 check_prog_host "/usr/bin/file"
 
 # Check make
-MAKE=$(which make 2> /dev/null)
+MAKE=$(command -v make 2> /dev/null)
 if [ -z "$MAKE" ] ; then
 	echo
 	echo "You must install 'make' on your build machine";
@@ -96,9 +96,9 @@ if [ $MAKE_MAJOR -lt 3 ] || [ $MAKE_MAJOR -eq 3 -a $MAKE_MINOR -lt 81 ] ; then
 fi;
 
 # Check host gcc
-COMPILER=$(which $HOSTCC_NOCCACHE 2> /dev/null)
+COMPILER=$(command -v "$HOSTCC_NOCCACHE" 2> /dev/null)
 if [ -z "$COMPILER" ] ; then
-	COMPILER=$(which cc 2> /dev/null)
+	COMPILER=$(command -v cc 2> /dev/null)
 fi;
 if [ -z "$COMPILER" ] ; then
 	echo
@@ -122,9 +122,9 @@ if [ $COMPILER_MAJOR -lt 4 -o $COMPILER_MAJOR -eq 4 -a $COMPILER_MINOR -lt 8 ] ;
 fi;
 
 # check for host CXX
-CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
+CXXCOMPILER=$(command -v "$HOSTCXX_NOCCACHE" 2> /dev/null)
 if [ -z "$CXXCOMPILER" ] ; then
-	CXXCOMPILER=$(which c++ 2> /dev/null)
+	CXXCOMPILER=$(command -v c++ 2> /dev/null)
 fi
 
 if [ -z "$CXXCOMPILER" ] ; then
@@ -164,7 +164,7 @@ fi
 # Check that a few mandatory programs are installed
 missing_progs="no"
 for prog in perl tar wget cpio unzip rsync bc ${DL_TOOLS} ; do
-	if ! which $prog > /dev/null ; then
+	if ! command -v "$prog" > /dev/null ; then
 		echo "You must install '$prog' on your build machine";
 		missing_progs="yes"
 		if test $prog = "svn" ; then
@@ -198,7 +198,7 @@ if [ "${PATCH_MAJOR}" -lt 2 ] || [ "${PATCH_MAJOR}" -eq 2 -a "${PATCH_MINOR}" -l
 fi
 
 if grep ^BR2_NEEDS_HOST_UTF8_LOCALE=y $BR2_CONFIG > /dev/null; then
-	if ! which locale > /dev/null ; then
+	if ! command -v locale > /dev/null ; then
 		echo
 		echo "You need locale support on your build machine to build a toolchain supporting locales"
 		exit 1 ;
diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
index 68d7a3fe21..2d9d9a5d49 100644
--- a/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -74,7 +74,7 @@ endif
 ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
 ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
 # if no path set, figure it out from path
-TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
+TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell $(SHELL) -c "command -v '$(TOOLCHAIN_EXTERNAL_PREFIX)-gcc)'")
 endif
 else
 TOOLCHAIN_EXTERNAL_REL_BIN_PATH = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_REL_BIN_PATH))
-- 
2.33.0

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Re: [Buildroot] [RFC PATCH 1/3] make: support: use `command -v' instead of `which'

[Yann E. MORIN]

Petr, All,

On 2021-10-12 00:00 +0200, Petr Vorel spake thusly:
> `which' has been discontinued after 2.21 release in 2015 due this (git
> repository is empty [1]) and version shipped in Debian produces warning
> [2]:
> 
> /usr/bin/which: this version of `which' is deprecated; use `command -v' in scripts instead.

In the meantime, this is supposed to have been overrdien by the
technical committee:

    https://lwn.net/ml/debian-ctte/handler.994275.D994275.163536015027825.ackdone@bugs.debian.org/

Excerpt:

 --8<---
 1. The debianutils package must continue to provide the which(1) program
    until a compatible utility is available in a package that is at least
    transitively essential in Debian 12.

    For the Debian 12 release, we expect which(1) to be in either an
    Essential package or a transitively Essential package (that is, a
    package that is depended on by an Essential package).

 2. The which(1) program must not print any deprecation warnings.
 --8<---

As such, the situation is a calmer for now and is less urgent, and we
can address it for after 2021.11 (given that Debian 11 was released only
3 months ago, we have a bit of time ahead of us before Debian 12 finally
ships! ;-] )

Regards,
Yann E. MORIN.

> `command is POSIX [3] and supported on all common shells (bash, zsh,
> dash, busybox sh, mksh).
> 
> NOTE: originally merged as ca6a2907c2, but it had to be reverted due
> errors [4] (originally reported [5]). Problems were:
> 
> 1) Main problem was that make sometimes expected `command' as a
>    binary/script and run it with execve() (or any other exec*()
>    wrapper), instead of running it through a shell via system() [4]:
> 
>     $ make defconfig
>     [...]
>     $ make help
>     make[1]: command: Command not found
>     [...]
> 
>    Fixed by not relying to $(shell command -v ...) but shell with:
>    $(shell $(SHELL) -c "command -v ...").
> 
> 2) `command -v' handles only first parameter (unlike `which') [4].
>    Hopefully fixed with quoting variables. Quoting variables is also
>    needed, because both `command -v' without args and `type -p' exit 0.
> 
> Patch tested on both bash and dash as /bin/sh on various distros with
> having different make versions, including these previously affected
> (4.2.1, 4.0, 3.81).
> 
> [1] https://git.savannah.gnu.org/cgit/which.git
> [2] https://salsa.debian.org/debian/debianutils/-/commit/3a8dd10b4502f7bae8fc6973c13ce23fc9da7efb
> [3] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
> [4] https://lore.kernel.org/buildroot/20210930200402.GO1504958@scaer/
> [5] https://lore.kernel.org/buildroot/YVTIghzHs82uFBIe@pevik/T/#m95c17eb8374e4e3dd6eee700d397aa12cca0739e
> 
> Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
> ---
>  Makefile                                      | 22 +++++++++----------
>  package/Makefile.in                           |  8 +++----
>  support/dependencies/check-host-bison-flex.mk |  4 ++--
>  support/dependencies/check-host-cmake.sh      |  2 +-
>  support/dependencies/check-host-gzip.sh       |  2 +-
>  support/dependencies/check-host-lzip.sh       |  4 ++--
>  support/dependencies/check-host-python3.sh    |  2 +-
>  support/dependencies/check-host-tar.sh        |  4 ++--
>  support/dependencies/check-host-xzcat.sh      |  4 ++--
>  support/dependencies/dependencies.sh          | 16 +++++++-------
>  .../pkg-toolchain-external.mk                 |  2 +-
>  11 files changed, 35 insertions(+), 35 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index c960b53a6d..2317655272 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -284,12 +284,12 @@ HOSTAS := as
>  endif
>  ifndef HOSTCC
>  HOSTCC := gcc
> -HOSTCC := $(shell which $(HOSTCC) || type -p $(HOSTCC) || echo gcc)
> +HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p '$(HOSTCC)' || echo gcc")
>  endif
>  HOSTCC_NOCCACHE := $(HOSTCC)
>  ifndef HOSTCXX
>  HOSTCXX := g++
> -HOSTCXX := $(shell which $(HOSTCXX) || type -p $(HOSTCXX) || echo g++)
> +HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p '$(HOSTCXX)' || echo g++")
>  endif
>  HOSTCXX_NOCCACHE := $(HOSTCXX)
>  ifndef HOSTCPP
> @@ -310,15 +310,15 @@ endif
>  ifndef HOSTRANLIB
>  HOSTRANLIB := ranlib
>  endif
> -HOSTAR := $(shell which $(HOSTAR) || type -p $(HOSTAR) || echo ar)
> -HOSTAS := $(shell which $(HOSTAS) || type -p $(HOSTAS) || echo as)
> -HOSTCPP := $(shell which $(HOSTCPP) || type -p $(HOSTCPP) || echo cpp)
> -HOSTLD := $(shell which $(HOSTLD) || type -p $(HOSTLD) || echo ld)
> -HOSTLN := $(shell which $(HOSTLN) || type -p $(HOSTLN) || echo ln)
> -HOSTNM := $(shell which $(HOSTNM) || type -p $(HOSTNM) || echo nm)
> -HOSTOBJCOPY := $(shell which $(HOSTOBJCOPY) || type -p $(HOSTOBJCOPY) || echo objcopy)
> -HOSTRANLIB := $(shell which $(HOSTRANLIB) || type -p $(HOSTRANLIB) || echo ranlib)
> -SED := $(shell which sed || type -p sed) -i -e
> +HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p '$(HOSTAR)' || echo ar")
> +HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
> +HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' || echo cpp")
> +HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
> +HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln")
> +HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
> +HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
> +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib")
> +SED := $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e
>  
>  export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
>  export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
> diff --git a/package/Makefile.in b/package/Makefile.in
> index 86db62ba5b..2ba4d8b381 100644
> --- a/package/Makefile.in
> +++ b/package/Makefile.in
> @@ -4,7 +4,7 @@ endif
>  ifndef HOSTMAKE
>  HOSTMAKE = $(MAKE)
>  endif
> -HOSTMAKE := $(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)
> +HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")
>  
>  # If BR2_JLEVEL is 0, scale the maximum concurrency with the number of
>  # CPUs. An additional job is used in order to keep processors busy
> @@ -222,8 +222,8 @@ else
>  TARGET_STRIP = /bin/true
>  STRIPCMD = $(TARGET_STRIP)
>  endif
> -INSTALL := $(shell which install || type -p install)
> -UNZIP := $(shell which unzip || type -p unzip) -q
> +INSTALL := $(shell $(SHELL) -c "command -v install || type -p install")
> +UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p unzip") -q
>  
>  APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH support/scripts/apply-patches.sh $(if $(QUIET),-s)
>  
> @@ -237,7 +237,7 @@ HOST_LDFLAGS  += -L$(HOST_DIR)/lib -Wl,-rpath,$(HOST_DIR)/lib
>  # the path to the system perl, before a host-perl built by Buildroot
>  # might get installed into $(HOST_DIR)/bin and therefore appears
>  # in our PATH. This system perl will be used as INTLTOOL_PERL.
> -export PERL=$(shell which perl)
> +export PERL=$(shell $(SHELL) -c "command -v perl")
>  
>  # host-intltool needs libxml-parser-perl, which Buildroot installs in
>  # $(HOST_DIR)/lib/perl, so we must make sure that the system perl
> diff --git a/support/dependencies/check-host-bison-flex.mk b/support/dependencies/check-host-bison-flex.mk
> index 14a232fd44..b6cec369f1 100644
> --- a/support/dependencies/check-host-bison-flex.mk
> +++ b/support/dependencies/check-host-bison-flex.mk
> @@ -5,10 +5,10 @@
>  # that runs on host, e.g. Kconfig. To build code for target use plain
>  # host-{bison,flex}.
>  
> -ifeq ($(shell which bison 2>/dev/null),)
> +ifeq ($(shell $(SHELL) -c "command -v bison 2>/dev/null"),)
>  BR2_BISON_HOST_DEPENDENCY = host-bison
>  endif
>  
> -ifeq ($(shell which flex 2>/dev/null),)
> +ifeq ($(shell $(SHELL) -c "command -v flex 2>/dev/null"),)
>  BR2_FLEX_HOST_DEPENDENCY = host-flex
>  endif
> diff --git a/support/dependencies/check-host-cmake.sh b/support/dependencies/check-host-cmake.sh
> index fadeae9f6b..f202d72a98 100755
> --- a/support/dependencies/check-host-cmake.sh
> +++ b/support/dependencies/check-host-cmake.sh
> @@ -11,7 +11,7 @@ shift
>  for candidate; do
>  
>      # Try to locate the candidate. Discard it if not located.
> -    cmake=`which "${candidate}" 2>/dev/null`
> +    cmake=`command -v "${candidate}" 2>/dev/null`
>      [ -n "${cmake}" ] || continue
>  
>      # Extract version X.Y from versions in the form X.Y or X.Y.Z
> diff --git a/support/dependencies/check-host-gzip.sh b/support/dependencies/check-host-gzip.sh
> index 5f344c5f9b..4dbce72676 100755
> --- a/support/dependencies/check-host-gzip.sh
> +++ b/support/dependencies/check-host-gzip.sh
> @@ -2,7 +2,7 @@
>  
>  candidate="$1" # ignored
>  
> -gzip="$(which gzip)"
> +gzip="$(command -v gzip)"
>  if [ ! -x "${gzip}" ]; then
>      # echo nothing: no suitable gzip found
>      exit 1
> diff --git a/support/dependencies/check-host-lzip.sh b/support/dependencies/check-host-lzip.sh
> index 4f8a2ba3de..5cdfb8252a 100755
> --- a/support/dependencies/check-host-lzip.sh
> +++ b/support/dependencies/check-host-lzip.sh
> @@ -2,9 +2,9 @@
>  
>  candidate="$1"
>  
> -lzip=`which $candidate 2>/dev/null`
> +lzip=`command -v "$candidate" 2>/dev/null`
>  if [ ! -x "$lzip" ]; then
> -	lzip=`which lzip 2>/dev/null`
> +	lzip=`command -v lzip 2>/dev/null`
>  	if [ ! -x "$lzip" ]; then
>  		# echo nothing: no suitable lzip found
>  		exit 1
> diff --git a/support/dependencies/check-host-python3.sh b/support/dependencies/check-host-python3.sh
> index 17cafd2883..ca504da6ac 100755
> --- a/support/dependencies/check-host-python3.sh
> +++ b/support/dependencies/check-host-python3.sh
> @@ -14,7 +14,7 @@ shift
>  # a more recent version.
>  
>  for candidate in "${@}" ; do
> -	python3=`which $candidate 2>/dev/null`
> +	python3=`command -v "$candidate" 2>/dev/null`
>  	if [ ! -x "$python3" ]; then
>  		continue
>  	fi
> diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh
> index b7d607a47a..0f0f80038d 100755
> --- a/support/dependencies/check-host-tar.sh
> +++ b/support/dependencies/check-host-tar.sh
> @@ -2,9 +2,9 @@
>  
>  candidate="$1"
>  
> -tar=`which $candidate`
> +tar=`command -v "$candidate"`
>  if [ ! -x "$tar" ]; then
> -	tar=`which tar`
> +	tar=`command -v tar`
>  	if [ ! -x "$tar" ]; then
>  		# echo nothing: no suitable tar found
>  		exit 1
> diff --git a/support/dependencies/check-host-xzcat.sh b/support/dependencies/check-host-xzcat.sh
> index 10f1c4562a..a022c64faf 100755
> --- a/support/dependencies/check-host-xzcat.sh
> +++ b/support/dependencies/check-host-xzcat.sh
> @@ -2,9 +2,9 @@
>  
>  candidate="$1"
>  
> -xzcat=`which $candidate 2>/dev/null`
> +xzcat=`command -v "$candidate" 2>/dev/null`
>  if [ ! -x "$xzcat" ]; then
> -	xzcat=`which xzcat 2>/dev/null`
> +	xzcat=`command -v xzcat 2>/dev/null`
>  	if [ ! -x "$xzcat" ]; then
>  		# echo nothing: no suitable xzcat found
>  		exit 1
> diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
> index c604a9efcc..e720e9372e 100755
> --- a/support/dependencies/dependencies.sh
> +++ b/support/dependencies/dependencies.sh
> @@ -58,7 +58,7 @@ fi
>  check_prog_host()
>  {
>  	prog="$1"
> -	if ! which $prog > /dev/null ; then
> +	if ! command -v "$prog" > /dev/null ; then
>  		echo >&2
>  		echo "You must install '$prog' on your build machine" >&2
>  		exit 1
> @@ -75,7 +75,7 @@ check_prog_host "sed"
>  check_prog_host "/usr/bin/file"
>  
>  # Check make
> -MAKE=$(which make 2> /dev/null)
> +MAKE=$(command -v make 2> /dev/null)
>  if [ -z "$MAKE" ] ; then
>  	echo
>  	echo "You must install 'make' on your build machine";
> @@ -96,9 +96,9 @@ if [ $MAKE_MAJOR -lt 3 ] || [ $MAKE_MAJOR -eq 3 -a $MAKE_MINOR -lt 81 ] ; then
>  fi;
>  
>  # Check host gcc
> -COMPILER=$(which $HOSTCC_NOCCACHE 2> /dev/null)
> +COMPILER=$(command -v "$HOSTCC_NOCCACHE" 2> /dev/null)
>  if [ -z "$COMPILER" ] ; then
> -	COMPILER=$(which cc 2> /dev/null)
> +	COMPILER=$(command -v cc 2> /dev/null)
>  fi;
>  if [ -z "$COMPILER" ] ; then
>  	echo
> @@ -122,9 +122,9 @@ if [ $COMPILER_MAJOR -lt 4 -o $COMPILER_MAJOR -eq 4 -a $COMPILER_MINOR -lt 8 ] ;
>  fi;
>  
>  # check for host CXX
> -CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
> +CXXCOMPILER=$(command -v "$HOSTCXX_NOCCACHE" 2> /dev/null)
>  if [ -z "$CXXCOMPILER" ] ; then
> -	CXXCOMPILER=$(which c++ 2> /dev/null)
> +	CXXCOMPILER=$(command -v c++ 2> /dev/null)
>  fi
>  
>  if [ -z "$CXXCOMPILER" ] ; then
> @@ -164,7 +164,7 @@ fi
>  # Check that a few mandatory programs are installed
>  missing_progs="no"
>  for prog in perl tar wget cpio unzip rsync bc ${DL_TOOLS} ; do
> -	if ! which $prog > /dev/null ; then
> +	if ! command -v "$prog" > /dev/null ; then
>  		echo "You must install '$prog' on your build machine";
>  		missing_progs="yes"
>  		if test $prog = "svn" ; then
> @@ -198,7 +198,7 @@ if [ "${PATCH_MAJOR}" -lt 2 ] || [ "${PATCH_MAJOR}" -eq 2 -a "${PATCH_MINOR}" -l
>  fi
>  
>  if grep ^BR2_NEEDS_HOST_UTF8_LOCALE=y $BR2_CONFIG > /dev/null; then
> -	if ! which locale > /dev/null ; then
> +	if ! command -v locale > /dev/null ; then
>  		echo
>  		echo "You need locale support on your build machine to build a toolchain supporting locales"
>  		exit 1 ;
> diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
> index 68d7a3fe21..2d9d9a5d49 100644
> --- a/toolchain/toolchain-external/pkg-toolchain-external.mk
> +++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
> @@ -74,7 +74,7 @@ endif
>  ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
>  ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
>  # if no path set, figure it out from path
> -TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
> +TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell $(SHELL) -c "command -v '$(TOOLCHAIN_EXTERNAL_PREFIX)-gcc)'")
>  endif
>  else
>  TOOLCHAIN_EXTERNAL_REL_BIN_PATH = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_REL_BIN_PATH))
> -- 
> 2.33.0
> 
> _______________________________________________
> buildroot mailing list
> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 561 099 427 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
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Re: [Buildroot] [RFC PATCH 1/3] make: support: use `command -v' instead of `which'

[Petr Vorel]

Hi Yann,

> Petr, All,

> On 2021-10-12 00:00 +0200, Petr Vorel spake thusly:
> > `which' has been discontinued after 2.21 release in 2015 due this (git
> > repository is empty [1]) and version shipped in Debian produces warning
> > [2]:

> > /usr/bin/which: this version of `which' is deprecated; use `command -v' in scripts instead.

> In the meantime, this is supposed to have been overrdien by the
> technical committee:

>     https://lwn.net/ml/debian-ctte/handler.994275.D994275.163536015027825.ackdone@bugs.debian.org/
Yep, I've noticed this on LWN as well.

> Excerpt:

>  --8<---
>  1. The debianutils package must continue to provide the which(1) program
>     until a compatible utility is available in a package that is at least
>     transitively essential in Debian 12.

>     For the Debian 12 release, we expect which(1) to be in either an
>     Essential package or a transitively Essential package (that is, a
>     package that is depended on by an Essential package).

>  2. The which(1) program must not print any deprecation warnings.
>  --8<---

> As such, the situation is a calmer for now and is less urgent, and we
> can address it for after 2021.11 (given that Debian 11 was released only
> 3 months ago, we have a bit of time ahead of us before Debian 12 finally
> ships! ;-] )

Well, some people use Debian testing :). But sure, it was never urgent,
the issue does not break build. This time I'm quite confident it works,
but one revert was enough => it can wait till more people find time to test it.

Kind regards,
Petr

> Regards,
> Yann E. MORIN.

> > `command is POSIX [3] and supported on all common shells (bash, zsh,
> > dash, busybox sh, mksh).

> > NOTE: originally merged as ca6a2907c2, but it had to be reverted due
> > errors [4] (originally reported [5]). Problems were:

> > 1) Main problem was that make sometimes expected `command' as a
> >    binary/script and run it with execve() (or any other exec*()
> >    wrapper), instead of running it through a shell via system() [4]:

> >     $ make defconfig
> >     [...]
> >     $ make help
> >     make[1]: command: Command not found
> >     [...]

> >    Fixed by not relying to $(shell command -v ...) but shell with:
> >    $(shell $(SHELL) -c "command -v ...").

> > 2) `command -v' handles only first parameter (unlike `which') [4].
> >    Hopefully fixed with quoting variables. Quoting variables is also
> >    needed, because both `command -v' without args and `type -p' exit 0.

> > Patch tested on both bash and dash as /bin/sh on various distros with
> > having different make versions, including these previously affected
> > (4.2.1, 4.0, 3.81).

> > [1] https://git.savannah.gnu.org/cgit/which.git
> > [2] https://salsa.debian.org/debian/debianutils/-/commit/3a8dd10b4502f7bae8fc6973c13ce23fc9da7efb
> > [3] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
> > [4] https://lore.kernel.org/buildroot/20210930200402.GO1504958@scaer/
> > [5] https://lore.kernel.org/buildroot/YVTIghzHs82uFBIe@pevik/T/#m95c17eb8374e4e3dd6eee700d397aa12cca0739e

> > Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
> > ---
> >  Makefile                                      | 22 +++++++++----------
> >  package/Makefile.in                           |  8 +++----
> >  support/dependencies/check-host-bison-flex.mk |  4 ++--
> >  support/dependencies/check-host-cmake.sh      |  2 +-
> >  support/dependencies/check-host-gzip.sh       |  2 +-
> >  support/dependencies/check-host-lzip.sh       |  4 ++--
> >  support/dependencies/check-host-python3.sh    |  2 +-
> >  support/dependencies/check-host-tar.sh        |  4 ++--
> >  support/dependencies/check-host-xzcat.sh      |  4 ++--
> >  support/dependencies/dependencies.sh          | 16 +++++++-------
> >  .../pkg-toolchain-external.mk                 |  2 +-
> >  11 files changed, 35 insertions(+), 35 deletions(-)

> > diff --git a/Makefile b/Makefile
> > index c960b53a6d..2317655272 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -284,12 +284,12 @@ HOSTAS := as
> >  endif
> >  ifndef HOSTCC
> >  HOSTCC := gcc
> > -HOSTCC := $(shell which $(HOSTCC) || type -p $(HOSTCC) || echo gcc)
> > +HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p '$(HOSTCC)' || echo gcc")
> >  endif
> >  HOSTCC_NOCCACHE := $(HOSTCC)
> >  ifndef HOSTCXX
> >  HOSTCXX := g++
> > -HOSTCXX := $(shell which $(HOSTCXX) || type -p $(HOSTCXX) || echo g++)
> > +HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p '$(HOSTCXX)' || echo g++")
> >  endif
> >  HOSTCXX_NOCCACHE := $(HOSTCXX)
> >  ifndef HOSTCPP
> > @@ -310,15 +310,15 @@ endif
> >  ifndef HOSTRANLIB
> >  HOSTRANLIB := ranlib
> >  endif
> > -HOSTAR := $(shell which $(HOSTAR) || type -p $(HOSTAR) || echo ar)
> > -HOSTAS := $(shell which $(HOSTAS) || type -p $(HOSTAS) || echo as)
> > -HOSTCPP := $(shell which $(HOSTCPP) || type -p $(HOSTCPP) || echo cpp)
> > -HOSTLD := $(shell which $(HOSTLD) || type -p $(HOSTLD) || echo ld)
> > -HOSTLN := $(shell which $(HOSTLN) || type -p $(HOSTLN) || echo ln)
> > -HOSTNM := $(shell which $(HOSTNM) || type -p $(HOSTNM) || echo nm)
> > -HOSTOBJCOPY := $(shell which $(HOSTOBJCOPY) || type -p $(HOSTOBJCOPY) || echo objcopy)
> > -HOSTRANLIB := $(shell which $(HOSTRANLIB) || type -p $(HOSTRANLIB) || echo ranlib)
> > -SED := $(shell which sed || type -p sed) -i -e
> > +HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p '$(HOSTAR)' || echo ar")
> > +HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
> > +HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' || echo cpp")
> > +HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
> > +HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln")
> > +HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
> > +HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
> > +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib")
> > +SED := $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e

> >  export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
> >  export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
> > diff --git a/package/Makefile.in b/package/Makefile.in
> > index 86db62ba5b..2ba4d8b381 100644
> > --- a/package/Makefile.in
> > +++ b/package/Makefile.in
> > @@ -4,7 +4,7 @@ endif
> >  ifndef HOSTMAKE
> >  HOSTMAKE = $(MAKE)
> >  endif
> > -HOSTMAKE := $(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)
> > +HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")

> >  # If BR2_JLEVEL is 0, scale the maximum concurrency with the number of
> >  # CPUs. An additional job is used in order to keep processors busy
> > @@ -222,8 +222,8 @@ else
> >  TARGET_STRIP = /bin/true
> >  STRIPCMD = $(TARGET_STRIP)
> >  endif
> > -INSTALL := $(shell which install || type -p install)
> > -UNZIP := $(shell which unzip || type -p unzip) -q
> > +INSTALL := $(shell $(SHELL) -c "command -v install || type -p install")
> > +UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p unzip") -q

> >  APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH support/scripts/apply-patches.sh $(if $(QUIET),-s)

> > @@ -237,7 +237,7 @@ HOST_LDFLAGS  += -L$(HOST_DIR)/lib -Wl,-rpath,$(HOST_DIR)/lib
> >  # the path to the system perl, before a host-perl built by Buildroot
> >  # might get installed into $(HOST_DIR)/bin and therefore appears
> >  # in our PATH. This system perl will be used as INTLTOOL_PERL.
> > -export PERL=$(shell which perl)
> > +export PERL=$(shell $(SHELL) -c "command -v perl")

> >  # host-intltool needs libxml-parser-perl, which Buildroot installs in
> >  # $(HOST_DIR)/lib/perl, so we must make sure that the system perl
> > diff --git a/support/dependencies/check-host-bison-flex.mk b/support/dependencies/check-host-bison-flex.mk
> > index 14a232fd44..b6cec369f1 100644
> > --- a/support/dependencies/check-host-bison-flex.mk
> > +++ b/support/dependencies/check-host-bison-flex.mk
> > @@ -5,10 +5,10 @@
> >  # that runs on host, e.g. Kconfig. To build code for target use plain
> >  # host-{bison,flex}.

> > -ifeq ($(shell which bison 2>/dev/null),)
> > +ifeq ($(shell $(SHELL) -c "command -v bison 2>/dev/null"),)
> >  BR2_BISON_HOST_DEPENDENCY = host-bison
> >  endif

> > -ifeq ($(shell which flex 2>/dev/null),)
> > +ifeq ($(shell $(SHELL) -c "command -v flex 2>/dev/null"),)
> >  BR2_FLEX_HOST_DEPENDENCY = host-flex
> >  endif
> > diff --git a/support/dependencies/check-host-cmake.sh b/support/dependencies/check-host-cmake.sh
> > index fadeae9f6b..f202d72a98 100755
> > --- a/support/dependencies/check-host-cmake.sh
> > +++ b/support/dependencies/check-host-cmake.sh
> > @@ -11,7 +11,7 @@ shift
> >  for candidate; do

> >      # Try to locate the candidate. Discard it if not located.
> > -    cmake=`which "${candidate}" 2>/dev/null`
> > +    cmake=`command -v "${candidate}" 2>/dev/null`
> >      [ -n "${cmake}" ] || continue

> >      # Extract version X.Y from versions in the form X.Y or X.Y.Z
> > diff --git a/support/dependencies/check-host-gzip.sh b/support/dependencies/check-host-gzip.sh
> > index 5f344c5f9b..4dbce72676 100755
> > --- a/support/dependencies/check-host-gzip.sh
> > +++ b/support/dependencies/check-host-gzip.sh
> > @@ -2,7 +2,7 @@

> >  candidate="$1" # ignored

> > -gzip="$(which gzip)"
> > +gzip="$(command -v gzip)"
> >  if [ ! -x "${gzip}" ]; then
> >      # echo nothing: no suitable gzip found
> >      exit 1
> > diff --git a/support/dependencies/check-host-lzip.sh b/support/dependencies/check-host-lzip.sh
> > index 4f8a2ba3de..5cdfb8252a 100755
> > --- a/support/dependencies/check-host-lzip.sh
> > +++ b/support/dependencies/check-host-lzip.sh
> > @@ -2,9 +2,9 @@

> >  candidate="$1"

> > -lzip=`which $candidate 2>/dev/null`
> > +lzip=`command -v "$candidate" 2>/dev/null`
> >  if [ ! -x "$lzip" ]; then
> > -	lzip=`which lzip 2>/dev/null`
> > +	lzip=`command -v lzip 2>/dev/null`
> >  	if [ ! -x "$lzip" ]; then
> >  		# echo nothing: no suitable lzip found
> >  		exit 1
> > diff --git a/support/dependencies/check-host-python3.sh b/support/dependencies/check-host-python3.sh
> > index 17cafd2883..ca504da6ac 100755
> > --- a/support/dependencies/check-host-python3.sh
> > +++ b/support/dependencies/check-host-python3.sh
> > @@ -14,7 +14,7 @@ shift
> >  # a more recent version.

> >  for candidate in "${@}" ; do
> > -	python3=`which $candidate 2>/dev/null`
> > +	python3=`command -v "$candidate" 2>/dev/null`
> >  	if [ ! -x "$python3" ]; then
> >  		continue
> >  	fi
> > diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh
> > index b7d607a47a..0f0f80038d 100755
> > --- a/support/dependencies/check-host-tar.sh
> > +++ b/support/dependencies/check-host-tar.sh
> > @@ -2,9 +2,9 @@

> >  candidate="$1"

> > -tar=`which $candidate`
> > +tar=`command -v "$candidate"`
> >  if [ ! -x "$tar" ]; then
> > -	tar=`which tar`
> > +	tar=`command -v tar`
> >  	if [ ! -x "$tar" ]; then
> >  		# echo nothing: no suitable tar found
> >  		exit 1
> > diff --git a/support/dependencies/check-host-xzcat.sh b/support/dependencies/check-host-xzcat.sh
> > index 10f1c4562a..a022c64faf 100755
> > --- a/support/dependencies/check-host-xzcat.sh
> > +++ b/support/dependencies/check-host-xzcat.sh
> > @@ -2,9 +2,9 @@

> >  candidate="$1"

> > -xzcat=`which $candidate 2>/dev/null`
> > +xzcat=`command -v "$candidate" 2>/dev/null`
> >  if [ ! -x "$xzcat" ]; then
> > -	xzcat=`which xzcat 2>/dev/null`
> > +	xzcat=`command -v xzcat 2>/dev/null`
> >  	if [ ! -x "$xzcat" ]; then
> >  		# echo nothing: no suitable xzcat found
> >  		exit 1
> > diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
> > index c604a9efcc..e720e9372e 100755
> > --- a/support/dependencies/dependencies.sh
> > +++ b/support/dependencies/dependencies.sh
> > @@ -58,7 +58,7 @@ fi
> >  check_prog_host()
> >  {
> >  	prog="$1"
> > -	if ! which $prog > /dev/null ; then
> > +	if ! command -v "$prog" > /dev/null ; then
> >  		echo >&2
> >  		echo "You must install '$prog' on your build machine" >&2
> >  		exit 1
> > @@ -75,7 +75,7 @@ check_prog_host "sed"
> >  check_prog_host "/usr/bin/file"

> >  # Check make
> > -MAKE=$(which make 2> /dev/null)
> > +MAKE=$(command -v make 2> /dev/null)
> >  if [ -z "$MAKE" ] ; then
> >  	echo
> >  	echo "You must install 'make' on your build machine";
> > @@ -96,9 +96,9 @@ if [ $MAKE_MAJOR -lt 3 ] || [ $MAKE_MAJOR -eq 3 -a $MAKE_MINOR -lt 81 ] ; then
> >  fi;

> >  # Check host gcc
> > -COMPILER=$(which $HOSTCC_NOCCACHE 2> /dev/null)
> > +COMPILER=$(command -v "$HOSTCC_NOCCACHE" 2> /dev/null)
> >  if [ -z "$COMPILER" ] ; then
> > -	COMPILER=$(which cc 2> /dev/null)
> > +	COMPILER=$(command -v cc 2> /dev/null)
> >  fi;
> >  if [ -z "$COMPILER" ] ; then
> >  	echo
> > @@ -122,9 +122,9 @@ if [ $COMPILER_MAJOR -lt 4 -o $COMPILER_MAJOR -eq 4 -a $COMPILER_MINOR -lt 8 ] ;
> >  fi;

> >  # check for host CXX
> > -CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
> > +CXXCOMPILER=$(command -v "$HOSTCXX_NOCCACHE" 2> /dev/null)
> >  if [ -z "$CXXCOMPILER" ] ; then
> > -	CXXCOMPILER=$(which c++ 2> /dev/null)
> > +	CXXCOMPILER=$(command -v c++ 2> /dev/null)
> >  fi

> >  if [ -z "$CXXCOMPILER" ] ; then
> > @@ -164,7 +164,7 @@ fi
> >  # Check that a few mandatory programs are installed
> >  missing_progs="no"
> >  for prog in perl tar wget cpio unzip rsync bc ${DL_TOOLS} ; do
> > -	if ! which $prog > /dev/null ; then
> > +	if ! command -v "$prog" > /dev/null ; then
> >  		echo "You must install '$prog' on your build machine";
> >  		missing_progs="yes"
> >  		if test $prog = "svn" ; then
> > @@ -198,7 +198,7 @@ if [ "${PATCH_MAJOR}" -lt 2 ] || [ "${PATCH_MAJOR}" -eq 2 -a "${PATCH_MINOR}" -l
> >  fi

> >  if grep ^BR2_NEEDS_HOST_UTF8_LOCALE=y $BR2_CONFIG > /dev/null; then
> > -	if ! which locale > /dev/null ; then
> > +	if ! command -v locale > /dev/null ; then
> >  		echo
> >  		echo "You need locale support on your build machine to build a toolchain supporting locales"
> >  		exit 1 ;
> > diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
> > index 68d7a3fe21..2d9d9a5d49 100644
> > --- a/toolchain/toolchain-external/pkg-toolchain-external.mk
> > +++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
> > @@ -74,7 +74,7 @@ endif
> >  ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
> >  ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
> >  # if no path set, figure it out from path
> > -TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
> > +TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell $(SHELL) -c "command -v '$(TOOLCHAIN_EXTERNAL_PREFIX)-gcc)'")
> >  endif
> >  else
> >  TOOLCHAIN_EXTERNAL_REL_BIN_PATH = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_REL_BIN_PATH))
> > -- 
> > 2.33.0

> > _______________________________________________
> > buildroot mailing list
> > buildroot@buildroot.org
> > https://lists.buildroot.org/mailman/listinfo/buildroot
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Re: [Buildroot] [RFC PATCH 1/3] make: support: use `command -v' instead of `which'

[Arnout Vandecappelle]

On 12/11/2021 22:55, Petr Vorel wrote:
> Hi Yann,
> 
>> Petr, All,
> 
>> On 2021-10-12 00:00 +0200, Petr Vorel spake thusly:
>>> `which' has been discontinued after 2.21 release in 2015 due this (git
>>> repository is empty [1]) and version shipped in Debian produces warning
>>> [2]:
> 
>>> /usr/bin/which: this version of `which' is deprecated; use `command -v' in scripts instead.
> 
>> In the meantime, this is supposed to have been overrdien by the
>> technical committee:
> 
>>      https://lwn.net/ml/debian-ctte/handler.994275.D994275.163536015027825.ackdone@bugs.debian.org/
> Yep, I've noticed this on LWN as well.
> 
>> Excerpt:
> 
>>   --8<---
>>   1. The debianutils package must continue to provide the which(1) program
>>      until a compatible utility is available in a package that is at least
>>      transitively essential in Debian 12.
> 
>>      For the Debian 12 release, we expect which(1) to be in either an
>>      Essential package or a transitively Essential package (that is, a
>>      package that is depended on by an Essential package).
> 
>>   2. The which(1) program must not print any deprecation warnings.
>>   --8<---
> 
>> As such, the situation is a calmer for now and is less urgent, and we
>> can address it for after 2021.11 (given that Debian 11 was released only
>> 3 months ago, we have a bit of time ahead of us before Debian 12 finally
>> ships! ;-] )
> 
> Well, some people use Debian testing :). But sure, it was never urgent,
> the issue does not break build. This time I'm quite confident it works,
> but one revert was enough => it can wait till more people find time to test it.

  In the end, it got reverted in debian testing as well, so we can drop this 
series (for now). I've marked them as Rejected in patchwork.

  Regards,
  Arnout

> 
> Kind regards,
> Petr
> 
>> Regards,
>> Yann E. MORIN.
> 
>>> `command is POSIX [3] and supported on all common shells (bash, zsh,
>>> dash, busybox sh, mksh).
> 
>>> NOTE: originally merged as ca6a2907c2, but it had to be reverted due
>>> errors [4] (originally reported [5]). Problems were:
> 
>>> 1) Main problem was that make sometimes expected `command' as a
>>>     binary/script and run it with execve() (or any other exec*()
>>>     wrapper), instead of running it through a shell via system() [4]:
> 
>>>      $ make defconfig
>>>      [...]
>>>      $ make help
>>>      make[1]: command: Command not found
>>>      [...]
> 
>>>     Fixed by not relying to $(shell command -v ...) but shell with:
>>>     $(shell $(SHELL) -c "command -v ...").
> 
>>> 2) `command -v' handles only first parameter (unlike `which') [4].
>>>     Hopefully fixed with quoting variables. Quoting variables is also
>>>     needed, because both `command -v' without args and `type -p' exit 0.
> 
>>> Patch tested on both bash and dash as /bin/sh on various distros with
>>> having different make versions, including these previously affected
>>> (4.2.1, 4.0, 3.81).
> 
>>> [1] https://git.savannah.gnu.org/cgit/which.git
>>> [2] https://salsa.debian.org/debian/debianutils/-/commit/3a8dd10b4502f7bae8fc6973c13ce23fc9da7efb
>>> [3] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
>>> [4] https://lore.kernel.org/buildroot/20210930200402.GO1504958@scaer/
>>> [5] https://lore.kernel.org/buildroot/YVTIghzHs82uFBIe@pevik/T/#m95c17eb8374e4e3dd6eee700d397aa12cca0739e
> 
>>> Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
>>> ---
>>>   Makefile                                      | 22 +++++++++----------
>>>   package/Makefile.in                           |  8 +++----
>>>   support/dependencies/check-host-bison-flex.mk |  4 ++--
>>>   support/dependencies/check-host-cmake.sh      |  2 +-
>>>   support/dependencies/check-host-gzip.sh       |  2 +-
>>>   support/dependencies/check-host-lzip.sh       |  4 ++--
>>>   support/dependencies/check-host-python3.sh    |  2 +-
>>>   support/dependencies/check-host-tar.sh        |  4 ++--
>>>   support/dependencies/check-host-xzcat.sh      |  4 ++--
>>>   support/dependencies/dependencies.sh          | 16 +++++++-------
>>>   .../pkg-toolchain-external.mk                 |  2 +-
>>>   11 files changed, 35 insertions(+), 35 deletions(-)
> 
>>> diff --git a/Makefile b/Makefile
>>> index c960b53a6d..2317655272 100644
>>> --- a/Makefile
>>> +++ b/Makefile
>>> @@ -284,12 +284,12 @@ HOSTAS := as
>>>   endif
>>>   ifndef HOSTCC
>>>   HOSTCC := gcc
>>> -HOSTCC := $(shell which $(HOSTCC) || type -p $(HOSTCC) || echo gcc)
>>> +HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p '$(HOSTCC)' || echo gcc")
>>>   endif
>>>   HOSTCC_NOCCACHE := $(HOSTCC)
>>>   ifndef HOSTCXX
>>>   HOSTCXX := g++
>>> -HOSTCXX := $(shell which $(HOSTCXX) || type -p $(HOSTCXX) || echo g++)
>>> +HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p '$(HOSTCXX)' || echo g++")
>>>   endif
>>>   HOSTCXX_NOCCACHE := $(HOSTCXX)
>>>   ifndef HOSTCPP
>>> @@ -310,15 +310,15 @@ endif
>>>   ifndef HOSTRANLIB
>>>   HOSTRANLIB := ranlib
>>>   endif
>>> -HOSTAR := $(shell which $(HOSTAR) || type -p $(HOSTAR) || echo ar)
>>> -HOSTAS := $(shell which $(HOSTAS) || type -p $(HOSTAS) || echo as)
>>> -HOSTCPP := $(shell which $(HOSTCPP) || type -p $(HOSTCPP) || echo cpp)
>>> -HOSTLD := $(shell which $(HOSTLD) || type -p $(HOSTLD) || echo ld)
>>> -HOSTLN := $(shell which $(HOSTLN) || type -p $(HOSTLN) || echo ln)
>>> -HOSTNM := $(shell which $(HOSTNM) || type -p $(HOSTNM) || echo nm)
>>> -HOSTOBJCOPY := $(shell which $(HOSTOBJCOPY) || type -p $(HOSTOBJCOPY) || echo objcopy)
>>> -HOSTRANLIB := $(shell which $(HOSTRANLIB) || type -p $(HOSTRANLIB) || echo ranlib)
>>> -SED := $(shell which sed || type -p sed) -i -e
>>> +HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p '$(HOSTAR)' || echo ar")
>>> +HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
>>> +HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' || echo cpp")
>>> +HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
>>> +HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln")
>>> +HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
>>> +HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
>>> +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib")
>>> +SED := $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e
> 
>>>   export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
>>>   export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
>>> diff --git a/package/Makefile.in b/package/Makefile.in
>>> index 86db62ba5b..2ba4d8b381 100644
>>> --- a/package/Makefile.in
>>> +++ b/package/Makefile.in
>>> @@ -4,7 +4,7 @@ endif
>>>   ifndef HOSTMAKE
>>>   HOSTMAKE = $(MAKE)
>>>   endif
>>> -HOSTMAKE := $(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)
>>> +HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")
> 
>>>   # If BR2_JLEVEL is 0, scale the maximum concurrency with the number of
>>>   # CPUs. An additional job is used in order to keep processors busy
>>> @@ -222,8 +222,8 @@ else
>>>   TARGET_STRIP = /bin/true
>>>   STRIPCMD = $(TARGET_STRIP)
>>>   endif
>>> -INSTALL := $(shell which install || type -p install)
>>> -UNZIP := $(shell which unzip || type -p unzip) -q
>>> +INSTALL := $(shell $(SHELL) -c "command -v install || type -p install")
>>> +UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p unzip") -q
> 
>>>   APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH support/scripts/apply-patches.sh $(if $(QUIET),-s)
> 
>>> @@ -237,7 +237,7 @@ HOST_LDFLAGS  += -L$(HOST_DIR)/lib -Wl,-rpath,$(HOST_DIR)/lib
>>>   # the path to the system perl, before a host-perl built by Buildroot
>>>   # might get installed into $(HOST_DIR)/bin and therefore appears
>>>   # in our PATH. This system perl will be used as INTLTOOL_PERL.
>>> -export PERL=$(shell which perl)
>>> +export PERL=$(shell $(SHELL) -c "command -v perl")
> 
>>>   # host-intltool needs libxml-parser-perl, which Buildroot installs in
>>>   # $(HOST_DIR)/lib/perl, so we must make sure that the system perl
>>> diff --git a/support/dependencies/check-host-bison-flex.mk b/support/dependencies/check-host-bison-flex.mk
>>> index 14a232fd44..b6cec369f1 100644
>>> --- a/support/dependencies/check-host-bison-flex.mk
>>> +++ b/support/dependencies/check-host-bison-flex.mk
>>> @@ -5,10 +5,10 @@
>>>   # that runs on host, e.g. Kconfig. To build code for target use plain
>>>   # host-{bison,flex}.
> 
>>> -ifeq ($(shell which bison 2>/dev/null),)
>>> +ifeq ($(shell $(SHELL) -c "command -v bison 2>/dev/null"),)
>>>   BR2_BISON_HOST_DEPENDENCY = host-bison
>>>   endif
> 
>>> -ifeq ($(shell which flex 2>/dev/null),)
>>> +ifeq ($(shell $(SHELL) -c "command -v flex 2>/dev/null"),)
>>>   BR2_FLEX_HOST_DEPENDENCY = host-flex
>>>   endif
>>> diff --git a/support/dependencies/check-host-cmake.sh b/support/dependencies/check-host-cmake.sh
>>> index fadeae9f6b..f202d72a98 100755
>>> --- a/support/dependencies/check-host-cmake.sh
>>> +++ b/support/dependencies/check-host-cmake.sh
>>> @@ -11,7 +11,7 @@ shift
>>>   for candidate; do
> 
>>>       # Try to locate the candidate. Discard it if not located.
>>> -    cmake=`which "${candidate}" 2>/dev/null`
>>> +    cmake=`command -v "${candidate}" 2>/dev/null`
>>>       [ -n "${cmake}" ] || continue
> 
>>>       # Extract version X.Y from versions in the form X.Y or X.Y.Z
>>> diff --git a/support/dependencies/check-host-gzip.sh b/support/dependencies/check-host-gzip.sh
>>> index 5f344c5f9b..4dbce72676 100755
>>> --- a/support/dependencies/check-host-gzip.sh
>>> +++ b/support/dependencies/check-host-gzip.sh
>>> @@ -2,7 +2,7 @@
> 
>>>   candidate="$1" # ignored
> 
>>> -gzip="$(which gzip)"
>>> +gzip="$(command -v gzip)"
>>>   if [ ! -x "${gzip}" ]; then
>>>       # echo nothing: no suitable gzip found
>>>       exit 1
>>> diff --git a/support/dependencies/check-host-lzip.sh b/support/dependencies/check-host-lzip.sh
>>> index 4f8a2ba3de..5cdfb8252a 100755
>>> --- a/support/dependencies/check-host-lzip.sh
>>> +++ b/support/dependencies/check-host-lzip.sh
>>> @@ -2,9 +2,9 @@
> 
>>>   candidate="$1"
> 
>>> -lzip=`which $candidate 2>/dev/null`
>>> +lzip=`command -v "$candidate" 2>/dev/null`
>>>   if [ ! -x "$lzip" ]; then
>>> -	lzip=`which lzip 2>/dev/null`
>>> +	lzip=`command -v lzip 2>/dev/null`
>>>   	if [ ! -x "$lzip" ]; then
>>>   		# echo nothing: no suitable lzip found
>>>   		exit 1
>>> diff --git a/support/dependencies/check-host-python3.sh b/support/dependencies/check-host-python3.sh
>>> index 17cafd2883..ca504da6ac 100755
>>> --- a/support/dependencies/check-host-python3.sh
>>> +++ b/support/dependencies/check-host-python3.sh
>>> @@ -14,7 +14,7 @@ shift
>>>   # a more recent version.
> 
>>>   for candidate in "${@}" ; do
>>> -	python3=`which $candidate 2>/dev/null`
>>> +	python3=`command -v "$candidate" 2>/dev/null`
>>>   	if [ ! -x "$python3" ]; then
>>>   		continue
>>>   	fi
>>> diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh
>>> index b7d607a47a..0f0f80038d 100755
>>> --- a/support/dependencies/check-host-tar.sh
>>> +++ b/support/dependencies/check-host-tar.sh
>>> @@ -2,9 +2,9 @@
> 
>>>   candidate="$1"
> 
>>> -tar=`which $candidate`
>>> +tar=`command -v "$candidate"`
>>>   if [ ! -x "$tar" ]; then
>>> -	tar=`which tar`
>>> +	tar=`command -v tar`
>>>   	if [ ! -x "$tar" ]; then
>>>   		# echo nothing: no suitable tar found
>>>   		exit 1
>>> diff --git a/support/dependencies/check-host-xzcat.sh b/support/dependencies/check-host-xzcat.sh
>>> index 10f1c4562a..a022c64faf 100755
>>> --- a/support/dependencies/check-host-xzcat.sh
>>> +++ b/support/dependencies/check-host-xzcat.sh
>>> @@ -2,9 +2,9 @@
> 
>>>   candidate="$1"
> 
>>> -xzcat=`which $candidate 2>/dev/null`
>>> +xzcat=`command -v "$candidate" 2>/dev/null`
>>>   if [ ! -x "$xzcat" ]; then
>>> -	xzcat=`which xzcat 2>/dev/null`
>>> +	xzcat=`command -v xzcat 2>/dev/null`
>>>   	if [ ! -x "$xzcat" ]; then
>>>   		# echo nothing: no suitable xzcat found
>>>   		exit 1
>>> diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
>>> index c604a9efcc..e720e9372e 100755
>>> --- a/support/dependencies/dependencies.sh
>>> +++ b/support/dependencies/dependencies.sh
>>> @@ -58,7 +58,7 @@ fi
>>>   check_prog_host()
>>>   {
>>>   	prog="$1"
>>> -	if ! which $prog > /dev/null ; then
>>> +	if ! command -v "$prog" > /dev/null ; then
>>>   		echo >&2
>>>   		echo "You must install '$prog' on your build machine" >&2
>>>   		exit 1
>>> @@ -75,7 +75,7 @@ check_prog_host "sed"
>>>   check_prog_host "/usr/bin/file"
> 
>>>   # Check make
>>> -MAKE=$(which make 2> /dev/null)
>>> +MAKE=$(command -v make 2> /dev/null)
>>>   if [ -z "$MAKE" ] ; then
>>>   	echo
>>>   	echo "You must install 'make' on your build machine";
>>> @@ -96,9 +96,9 @@ if [ $MAKE_MAJOR -lt 3 ] || [ $MAKE_MAJOR -eq 3 -a $MAKE_MINOR -lt 81 ] ; then
>>>   fi;
> 
>>>   # Check host gcc
>>> -COMPILER=$(which $HOSTCC_NOCCACHE 2> /dev/null)
>>> +COMPILER=$(command -v "$HOSTCC_NOCCACHE" 2> /dev/null)
>>>   if [ -z "$COMPILER" ] ; then
>>> -	COMPILER=$(which cc 2> /dev/null)
>>> +	COMPILER=$(command -v cc 2> /dev/null)
>>>   fi;
>>>   if [ -z "$COMPILER" ] ; then
>>>   	echo
>>> @@ -122,9 +122,9 @@ if [ $COMPILER_MAJOR -lt 4 -o $COMPILER_MAJOR -eq 4 -a $COMPILER_MINOR -lt 8 ] ;
>>>   fi;
> 
>>>   # check for host CXX
>>> -CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
>>> +CXXCOMPILER=$(command -v "$HOSTCXX_NOCCACHE" 2> /dev/null)
>>>   if [ -z "$CXXCOMPILER" ] ; then
>>> -	CXXCOMPILER=$(which c++ 2> /dev/null)
>>> +	CXXCOMPILER=$(command -v c++ 2> /dev/null)
>>>   fi
> 
>>>   if [ -z "$CXXCOMPILER" ] ; then
>>> @@ -164,7 +164,7 @@ fi
>>>   # Check that a few mandatory programs are installed
>>>   missing_progs="no"
>>>   for prog in perl tar wget cpio unzip rsync bc ${DL_TOOLS} ; do
>>> -	if ! which $prog > /dev/null ; then
>>> +	if ! command -v "$prog" > /dev/null ; then
>>>   		echo "You must install '$prog' on your build machine";
>>>   		missing_progs="yes"
>>>   		if test $prog = "svn" ; then
>>> @@ -198,7 +198,7 @@ if [ "${PATCH_MAJOR}" -lt 2 ] || [ "${PATCH_MAJOR}" -eq 2 -a "${PATCH_MINOR}" -l
>>>   fi
> 
>>>   if grep ^BR2_NEEDS_HOST_UTF8_LOCALE=y $BR2_CONFIG > /dev/null; then
>>> -	if ! which locale > /dev/null ; then
>>> +	if ! command -v locale > /dev/null ; then
>>>   		echo
>>>   		echo "You need locale support on your build machine to build a toolchain supporting locales"
>>>   		exit 1 ;
>>> diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
>>> index 68d7a3fe21..2d9d9a5d49 100644
>>> --- a/toolchain/toolchain-external/pkg-toolchain-external.mk
>>> +++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
>>> @@ -74,7 +74,7 @@ endif
>>>   ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
>>>   ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
>>>   # if no path set, figure it out from path
>>> -TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
>>> +TOOLCHAIN_EXTERNAL_BIN := $(dir $(shell $(SHELL) -c "command -v '$(TOOLCHAIN_EXTERNAL_PREFIX)-gcc)'")
>>>   endif
>>>   else
>>>   TOOLCHAIN_EXTERNAL_REL_BIN_PATH = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_REL_BIN_PATH))
>>> -- 
>>> 2.33.0
> 
>>> _______________________________________________
>>> buildroot mailing list
>>> buildroot@buildroot.org
>>> https://lists.buildroot.org/mailman/listinfo/buildroot
> _______________________________________________
> buildroot mailing list
> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot
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Re: [Buildroot] [RFC PATCH 1/3] make: support: use `command -v' instead of `which'

[Petr Vorel]

[-- Attachment #1.1: Type: text/plain, Size: 631 bytes --]

Hi all,


> > Well, some people use Debian testing :). But sure, it was never urgent,
> > the issue does not break build. This time I'm quite confident it works,
> > but one revert was enough => it can wait till more people find time to
> test it.
>
>   In the end, it got reverted in debian testing as well, so we can drop
> this
> series (for now). I've marked them as Rejected in patchwork.
>
> Thanks, I haven't noticed myself. The revert [1] was released
in debianutils 5.6 [1].

Kind regards,
Petr

[1]
https://salsa.debian.org/debian/debianutils/-/commit/3694cf60572a6c231f2e931f4d075950113599d4


>   Regards,
>   Arnout
>

[-- Attachment #1.2: Type: text/html, Size: 1218 bytes --]

[-- Attachment #2: Type: text/plain, Size: 150 bytes --]

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[Buildroot] [RFC PATCH 2/3] make: Drop `type -p ...' fallback

[Petr Vorel]

`command -v' is good enough as it's POSIX.
For easier debugging previous problems removed separately.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
 Makefile            | 22 +++++++++++-----------
 package/Makefile.in |  6 +++---
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 2317655272..81b7173974 100644
--- a/Makefile
+++ b/Makefile
@@ -284,12 +284,12 @@ HOSTAS := as
 endif
 ifndef HOSTCC
 HOSTCC := gcc
-HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p '$(HOSTCC)' || echo gcc")
+HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || echo gcc")
 endif
 HOSTCC_NOCCACHE := $(HOSTCC)
 ifndef HOSTCXX
 HOSTCXX := g++
-HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p '$(HOSTCXX)' || echo g++")
+HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || echo g++")
 endif
 HOSTCXX_NOCCACHE := $(HOSTCXX)
 ifndef HOSTCPP
@@ -310,15 +310,15 @@ endif
 ifndef HOSTRANLIB
 HOSTRANLIB := ranlib
 endif
-HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p '$(HOSTAR)' || echo ar")
-HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
-HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' || echo cpp")
-HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
-HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln")
-HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
-HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
-HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib")
-SED := $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e
+HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || echo ar")
+HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || echo as")
+HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || echo cpp")
+HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || echo ld")
+HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || echo ln")
+HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || echo nm")
+HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || echo objcopy")
+HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)' || echo ranlib")
+SED := $(shell $(SHELL) -c "command -v sed") -i -e
 
 export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
 export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
diff --git a/package/Makefile.in b/package/Makefile.in
index 2ba4d8b381..4e993ecd5f 100644
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -4,7 +4,7 @@ endif
 ifndef HOSTMAKE
 HOSTMAKE = $(MAKE)
 endif
-HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")
+HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || echo make")
 
 # If BR2_JLEVEL is 0, scale the maximum concurrency with the number of
 # CPUs. An additional job is used in order to keep processors busy
@@ -222,8 +222,8 @@ else
 TARGET_STRIP = /bin/true
 STRIPCMD = $(TARGET_STRIP)
 endif
-INSTALL := $(shell $(SHELL) -c "command -v install || type -p install")
-UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p unzip") -q
+INSTALL := $(shell $(SHELL) -c "command -v install")
+UNZIP := $(shell $(SHELL) -c "command -v unzip") -q
 
 APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH support/scripts/apply-patches.sh $(if $(QUIET),-s)
 
-- 
2.33.0

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Re: [Buildroot] [RFC PATCH 2/3] make: Drop `type -p ...' fallback

[Cyril Bur]

On Tue, 12 Oct 2021 00:00:24 +0200
Petr Vorel <petr.vorel@gmail.com> wrote:

> `command -v' is good enough as it's POSIX.
> For easier debugging previous problems removed separately.
> 

On doing some reading[1] I've discovered that this is a minefield.
Having said that, I'm pretty sure what currently happens isn't
good either.

My only concern might be that theres old RHEL (its always RHEL ;))
systems out there which could break. Some of my coleagues use old RHEL
VMs for their build machines. I'm going to try and see if I can get
access but I wouldn't hold up the patch waiting.

I've given this patch applied with the previous one a test and is
working fine on my system. I'm wondering if my tested by tag is
appropriate for the previous patch since I haven't tested it in
isolation.

uname -a
Linux 5.14.12-arch1-1 #1 SMP PREEMPT Wed, 13 Oct 2021 16:58:16
+0000 x86_64 GNU/Linux

make --version
GNU Make 4.3
Built for x86_64-pc-linux-gnu

/bin/sh --version
GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)

[1]
https://unix.stackexchange.com/questions/85249/why-not-use-which-what-to-use-then

Tested-by: Cyril Bur <cyrilbur@gmail.com>
Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
> Signed-off-by: Petr Vorel <petr.vorel@gmail.com>



> ---
>  Makefile            | 22 +++++++++++-----------
>  package/Makefile.in |  6 +++---
>  2 files changed, 14 insertions(+), 14 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 2317655272..81b7173974 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -284,12 +284,12 @@ HOSTAS := as
>  endif
>  ifndef HOSTCC
>  HOSTCC := gcc
> -HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p
> '$(HOSTCC)' || echo gcc") +HOSTCC := $(shell $(SHELL) -c "command -v
> '$(HOSTCC)' || echo gcc") endif
>  HOSTCC_NOCCACHE := $(HOSTCC)
>  ifndef HOSTCXX
>  HOSTCXX := g++
> -HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p
> '$(HOSTCXX)' || echo g++") +HOSTCXX := $(shell $(SHELL) -c "command
> -v '$(HOSTCXX)' || echo g++") endif
>  HOSTCXX_NOCCACHE := $(HOSTCXX)
>  ifndef HOSTCPP
> @@ -310,15 +310,15 @@ endif
>  ifndef HOSTRANLIB
>  HOSTRANLIB := ranlib
>  endif
> -HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p
> '$(HOSTAR)' || echo ar") -HOSTAS := $(shell '$(SHELL)' -c "command -v
> '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as") -HOSTCPP := $(shell
> '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' ||
> echo cpp") -HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)'
> || type -p '$(HOSTLD)' || echo ld") -HOSTLN := $(shell '$(SHELL)' -c
> "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln") -HOSTNM
> := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p
> '$(HOSTNM)' || echo nm") -HOSTOBJCOPY := $(shell '$(SHELL)' -c
> "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo
> objcopy") -HOSTRANLIB := $(shell '$(SHELL)' -c "command -v
> '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib") -SED :=
> $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e +HOSTAR :=
> $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || echo ar") +HOSTAS :=
> $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || echo as") +HOSTCPP
> := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || echo cpp")
> +HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || echo ld")
> +HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || echo ln")
> +HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || echo nm")
> +HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' ||
> echo objcopy") +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v
> '$(HOSTRANLIB)' || echo ranlib") +SED := $(shell $(SHELL) -c "command
> -v sed") -i -e export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD export
> HOSTCC_NOCCACHE HOSTCXX_NOCCACHE diff --git a/package/Makefile.in
> b/package/Makefile.in index 2ba4d8b381..4e993ecd5f 100644 ---
> a/package/Makefile.in +++ b/package/Makefile.in @@ -4,7 +4,7 @@ endif
>  ifndef HOSTMAKE
>  HOSTMAKE = $(MAKE)
>  endif
> -HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p
> '$(HOSTMAKE)' || echo make") +HOSTMAKE := $(shell $(SHELL) -c
> "command -v '$(HOSTMAKE)' || echo make") 
>  # If BR2_JLEVEL is 0, scale the maximum concurrency with the number
> of # CPUs. An additional job is used in order to keep processors busy
> @@ -222,8 +222,8 @@ else
>  TARGET_STRIP = /bin/true
>  STRIPCMD = $(TARGET_STRIP)
>  endif
> -INSTALL := $(shell $(SHELL) -c "command -v install || type -p
> install") -UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p
> unzip") -q +INSTALL := $(shell $(SHELL) -c "command -v install")
> +UNZIP := $(shell $(SHELL) -c "command -v unzip") -q
>  
>  APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH
> support/scripts/apply-patches.sh $(if $(QUIET),-s) 

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Re: [Buildroot] [RFC PATCH 2/3] make: Drop `type -p ...' fallback

[Petr Vorel]

Hi Cyril,

> On Tue, 12 Oct 2021 00:00:24 +0200
> Petr Vorel <petr.vorel@gmail.com> wrote:

> > `command -v' is good enough as it's POSIX.
> > For easier debugging previous problems removed separately.


> On doing some reading[1] I've discovered that this is a minefield.
> Having said that, I'm pretty sure what currently happens isn't
> good either.

> My only concern might be that theres old RHEL (its always RHEL ;))
> systems out there which could break. Some of my coleagues use old RHEL
> VMs for their build machines. I'm going to try and see if I can get
> access but I wouldn't hold up the patch waiting.
Thanks a lot for pointing this out. Which RHEL version do you mean?
Testing it would save me time to install CentOS (if you mean CentOS 6).

> I've given this patch applied with the previous one a test and is
> working fine on my system. I'm wondering if my tested by tag is
> appropriate for the previous patch since I haven't tested it in
> isolation.
Well, if this (i.e. second) patch works previous version should work as well.

> uname -a
> Linux 5.14.12-arch1-1 #1 SMP PREEMPT Wed, 13 Oct 2021 16:58:16
> +0000 x86_64 GNU/Linux

> make --version
> GNU Make 4.3
> Built for x86_64-pc-linux-gnu

> /bin/sh --version
> GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)

I tested it on similar environment. Tested it also on older distros (Debian
buster (oldstable) and Cent0S 7.

> [1]
> https://unix.stackexchange.com/questions/85249/why-not-use-which-what-to-use-then

> Tested-by: Cyril Bur <cyrilbur@gmail.com>
> Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
> > Signed-off-by: Petr Vorel <petr.vorel@gmail.com>

<snip>

Kind regards,
Petr
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Re: [Buildroot] [RFC PATCH 2/3] make: Drop `type -p ...' fallback

[Yann E. MORIN]

Cyril, All,

On 2021-10-28 14:52 +0100, Cyril Bur spake thusly:
> On Tue, 12 Oct 2021 00:00:24 +0200
> Petr Vorel <petr.vorel@gmail.com> wrote:
> 
> > `command -v' is good enough as it's POSIX.
> > For easier debugging previous problems removed separately.
> > 
> 
> On doing some reading[1] I've discovered that this is a minefield.

Hmm.. A very long history lesson. Thanks! :-)

> Having said that, I'm pretty sure what currently happens isn't
> good either.
> 
> My only concern might be that theres old RHEL (its always RHEL ;))

**jiggles**

> systems out there which could break. Some of my coleagues use old RHEL
> VMs for their build machines. I'm going to try and see if I can get
> access but I wouldn't hold up the patch waiting.
> 
> I've given this patch applied with the previous one a test and is
> working fine on my system. I'm wondering if my tested by tag is
> appropriate for the previous patch since I haven't tested it in
> isolation.

A tested-by tag is always welcome: it means some people were interested
enough that they went off their daily lives and took time to test the
patch.

Thaks!

Regards,
Yann E. MORIN.

> uname -a
> Linux 5.14.12-arch1-1 #1 SMP PREEMPT Wed, 13 Oct 2021 16:58:16
> +0000 x86_64 GNU/Linux
> 
> make --version
> GNU Make 4.3
> Built for x86_64-pc-linux-gnu
> 
> /bin/sh --version
> GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)
> 
> [1]
> https://unix.stackexchange.com/questions/85249/why-not-use-which-what-to-use-then
> 
> Tested-by: Cyril Bur <cyrilbur@gmail.com>
> Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
> > Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
> 
> 
> 
> > ---
> >  Makefile            | 22 +++++++++++-----------
> >  package/Makefile.in |  6 +++---
> >  2 files changed, 14 insertions(+), 14 deletions(-)
> > 
> > diff --git a/Makefile b/Makefile
> > index 2317655272..81b7173974 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -284,12 +284,12 @@ HOSTAS := as
> >  endif
> >  ifndef HOSTCC
> >  HOSTCC := gcc
> > -HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p
> > '$(HOSTCC)' || echo gcc") +HOSTCC := $(shell $(SHELL) -c "command -v
> > '$(HOSTCC)' || echo gcc") endif
> >  HOSTCC_NOCCACHE := $(HOSTCC)
> >  ifndef HOSTCXX
> >  HOSTCXX := g++
> > -HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type -p
> > '$(HOSTCXX)' || echo g++") +HOSTCXX := $(shell $(SHELL) -c "command
> > -v '$(HOSTCXX)' || echo g++") endif
> >  HOSTCXX_NOCCACHE := $(HOSTCXX)
> >  ifndef HOSTCPP
> > @@ -310,15 +310,15 @@ endif
> >  ifndef HOSTRANLIB
> >  HOSTRANLIB := ranlib
> >  endif
> > -HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type -p
> > '$(HOSTAR)' || echo ar") -HOSTAS := $(shell '$(SHELL)' -c "command -v
> > '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as") -HOSTCPP := $(shell
> > '$(SHELL)' -c "command -v '$(HOSTCPP)' || type -p '$(HOSTCPP)' ||
> > echo cpp") -HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)'
> > || type -p '$(HOSTLD)' || echo ld") -HOSTLN := $(shell '$(SHELL)' -c
> > "command -v '$(HOSTLN)' || type -p '$(HOSTLN)' || echo ln") -HOSTNM
> > := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || type -p
> > '$(HOSTNM)' || echo nm") -HOSTOBJCOPY := $(shell '$(SHELL)' -c
> > "command -v '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo
> > objcopy") -HOSTRANLIB := $(shell '$(SHELL)' -c "command -v
> > '$(HOSTRANLIB)' || type -p '$(HOSTRANLIB)' || echo ranlib") -SED :=
> > $(shell $(SHELL) -c "command -v sed || type -p sed") -i -e +HOSTAR :=
> > $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || echo ar") +HOSTAS :=
> > $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || echo as") +HOSTCPP
> > := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' || echo cpp")
> > +HOSTLD := $(shell '$(SHELL)' -c "command -v '$(HOSTLD)' || echo ld")
> > +HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || echo ln")
> > +HOSTNM := $(shell '$(SHELL)' -c "command -v '$(HOSTNM)' || echo nm")
> > +HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' ||
> > echo objcopy") +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v
> > '$(HOSTRANLIB)' || echo ranlib") +SED := $(shell $(SHELL) -c "command
> > -v sed") -i -e export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD export
> > HOSTCC_NOCCACHE HOSTCXX_NOCCACHE diff --git a/package/Makefile.in
> > b/package/Makefile.in index 2ba4d8b381..4e993ecd5f 100644 ---
> > a/package/Makefile.in +++ b/package/Makefile.in @@ -4,7 +4,7 @@ endif
> >  ifndef HOSTMAKE
> >  HOSTMAKE = $(MAKE)
> >  endif
> > -HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' || type -p
> > '$(HOSTMAKE)' || echo make") +HOSTMAKE := $(shell $(SHELL) -c
> > "command -v '$(HOSTMAKE)' || echo make") 
> >  # If BR2_JLEVEL is 0, scale the maximum concurrency with the number
> > of # CPUs. An additional job is used in order to keep processors busy
> > @@ -222,8 +222,8 @@ else
> >  TARGET_STRIP = /bin/true
> >  STRIPCMD = $(TARGET_STRIP)
> >  endif
> > -INSTALL := $(shell $(SHELL) -c "command -v install || type -p
> > install") -UNZIP := $(shell $(SHELL) -c "command -v unzip || type -p
> > unzip") -q +INSTALL := $(shell $(SHELL) -c "command -v install")
> > +UNZIP := $(shell $(SHELL) -c "command -v unzip") -q
> >  
> >  APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH
> > support/scripts/apply-patches.sh $(if $(QUIET),-s) 
> 
> _______________________________________________
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> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 561 099 427 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'
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Re: [Buildroot] [RFC PATCH 2/3] make: Drop `type -p ...' fallback

[Cyril Bur]

On Thu, 11 Nov 2021 09:13:39 +0100
"Yann E. MORIN" <yann.morin.1998@free.fr> wrote:

> Cyril, All,
> 
> On 2021-10-28 14:52 +0100, Cyril Bur spake thusly:
> > On Tue, 12 Oct 2021 00:00:24 +0200
> > Petr Vorel <petr.vorel@gmail.com> wrote:
> >   
> > > `command -v' is good enough as it's POSIX.
> > > For easier debugging previous problems removed separately.
> > >   
> > 
> > On doing some reading[1] I've discovered that this is a minefield.  
> 
> Hmm.. A very long history lesson. Thanks! :-)
> 
> > Having said that, I'm pretty sure what currently happens isn't
> > good either.
> > 
> > My only concern might be that theres old RHEL (its always RHEL ;))  
> 
> **jiggles**


I'll add that I have tried to test on the old RHEL VM that colleagues
insist on still using and the build doesn't work, no fault of BR though.
I suspect that all working directories are actualy mounted on top of a
FAT or some funky windows share (I can't see the underlying store) so
`cp -p ...` fails because the unlieing store (whatever it is) can't do
the correct permissions (educated guess). I can't remember which
package (I think perhaps libc) uses these copies so they fail.

Yes I did try to run out of a tmpfs but didn't have access to one big
enough.

I don't expect a fix, just thought I'd make you aware. Also, just to be
clear those problems are obviously nothing to do with this patch or
series!

> 
> > systems out there which could break. Some of my coleagues use old
> > RHEL VMs for their build machines. I'm going to try and see if I
> > can get access but I wouldn't hold up the patch waiting.
> > 
> > I've given this patch applied with the previous one a test and is
> > working fine on my system. I'm wondering if my tested by tag is
> > appropriate for the previous patch since I haven't tested it in
> > isolation.  
> 
> A tested-by tag is always welcome: it means some people were
> interested enough that they went off their daily lives and took time
> to test the patch.
> 

Glad to be of assistance.

Cyril

> Thaks!
> 
> Regards,
> Yann E. MORIN.
> 
> > uname -a
> > Linux 5.14.12-arch1-1 #1 SMP PREEMPT Wed, 13 Oct 2021 16:58:16
> > +0000 x86_64 GNU/Linux
> > 
> > make --version
> > GNU Make 4.3
> > Built for x86_64-pc-linux-gnu
> > 
> > /bin/sh --version
> > GNU bash, version 5.1.8(1)-release (x86_64-pc-linux-gnu)
> > 
> > [1]
> > https://unix.stackexchange.com/questions/85249/why-not-use-which-what-to-use-then
> > 
> > Tested-by: Cyril Bur <cyrilbur@gmail.com>
> > Reviewed-by: Cyril Bur <cyrilbur@gmail.com>  
> > > Signed-off-by: Petr Vorel <petr.vorel@gmail.com>  
> > 
> > 
> >   
> > > ---
> > >  Makefile            | 22 +++++++++++-----------
> > >  package/Makefile.in |  6 +++---
> > >  2 files changed, 14 insertions(+), 14 deletions(-)
> > > 
> > > diff --git a/Makefile b/Makefile
> > > index 2317655272..81b7173974 100644
> > > --- a/Makefile
> > > +++ b/Makefile
> > > @@ -284,12 +284,12 @@ HOSTAS := as
> > >  endif
> > >  ifndef HOSTCC
> > >  HOSTCC := gcc
> > > -HOSTCC := $(shell $(SHELL) -c "command -v '$(HOSTCC)' || type -p
> > > '$(HOSTCC)' || echo gcc") +HOSTCC := $(shell $(SHELL) -c "command
> > > -v '$(HOSTCC)' || echo gcc") endif
> > >  HOSTCC_NOCCACHE := $(HOSTCC)
> > >  ifndef HOSTCXX
> > >  HOSTCXX := g++
> > > -HOSTCXX := $(shell $(SHELL) -c "command -v '$(HOSTCXX)' || type
> > > -p '$(HOSTCXX)' || echo g++") +HOSTCXX := $(shell $(SHELL) -c
> > > "command -v '$(HOSTCXX)' || echo g++") endif
> > >  HOSTCXX_NOCCACHE := $(HOSTCXX)
> > >  ifndef HOSTCPP
> > > @@ -310,15 +310,15 @@ endif
> > >  ifndef HOSTRANLIB
> > >  HOSTRANLIB := ranlib
> > >  endif
> > > -HOSTAR := $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || type
> > > -p '$(HOSTAR)' || echo ar") -HOSTAS := $(shell '$(SHELL)' -c
> > > "command -v '$(HOSTAS)' || type -p '$(HOSTAS)' || echo as")
> > > -HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)' ||
> > > type -p '$(HOSTCPP)' || echo cpp") -HOSTLD := $(shell '$(SHELL)'
> > > -c "command -v '$(HOSTLD)' || type -p '$(HOSTLD)' || echo ld")
> > > -HOSTLN := $(shell '$(SHELL)' -c "command -v '$(HOSTLN)' || type
> > > -p '$(HOSTLN)' || echo ln") -HOSTNM := $(shell '$(SHELL)' -c
> > > "command -v '$(HOSTNM)' || type -p '$(HOSTNM)' || echo nm")
> > > -HOSTOBJCOPY := $(shell '$(SHELL)' -c "command -v
> > > '$(HOSTOBJCOPY)' || type -p '$(HOSTOBJCOPY)' || echo objcopy")
> > > -HOSTRANLIB := $(shell '$(SHELL)' -c "command -v '$(HOSTRANLIB)'
> > > || type -p '$(HOSTRANLIB)' || echo ranlib") -SED := $(shell
> > > $(SHELL) -c "command -v sed || type -p sed") -i -e +HOSTAR :=
> > > $(shell '$(SHELL)' -c "command -v '$(HOSTAR)' || echo ar")
> > > +HOSTAS := $(shell '$(SHELL)' -c "command -v '$(HOSTAS)' || echo
> > > as") +HOSTCPP := $(shell '$(SHELL)' -c "command -v '$(HOSTCPP)'
> > > || echo cpp") +HOSTLD := $(shell '$(SHELL)' -c "command -v
> > > '$(HOSTLD)' || echo ld") +HOSTLN := $(shell '$(SHELL)' -c
> > > "command -v '$(HOSTLN)' || echo ln") +HOSTNM := $(shell
> > > '$(SHELL)' -c "command -v '$(HOSTNM)' || echo nm") +HOSTOBJCOPY
> > > := $(shell '$(SHELL)' -c "command -v '$(HOSTOBJCOPY)' || echo
> > > objcopy") +HOSTRANLIB := $(shell '$(SHELL)' -c "command -v
> > > '$(HOSTRANLIB)' || echo ranlib") +SED := $(shell $(SHELL) -c
> > > "command -v sed") -i -e export HOSTAR HOSTAS HOSTCC HOSTCXX
> > > HOSTLD export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE diff --git
> > > a/package/Makefile.in b/package/Makefile.in index
> > > 2ba4d8b381..4e993ecd5f 100644 --- a/package/Makefile.in +++
> > > b/package/Makefile.in @@ -4,7 +4,7 @@ endif ifndef HOSTMAKE
> > > HOSTMAKE = $(MAKE) endif -HOSTMAKE := $(shell $(SHELL) -c
> > > "command -v '$(HOSTMAKE)' || type -p '$(HOSTMAKE)' || echo make")
> > > +HOSTMAKE := $(shell $(SHELL) -c "command -v '$(HOSTMAKE)' ||
> > > echo make") # If BR2_JLEVEL is 0, scale the maximum concurrency
> > > with the number of # CPUs. An additional job is used in order to
> > > keep processors busy @@ -222,8 +222,8 @@ else
> > >  TARGET_STRIP = /bin/true
> > >  STRIPCMD = $(TARGET_STRIP)
> > >  endif
> > > -INSTALL := $(shell $(SHELL) -c "command -v install || type -p
> > > install") -UNZIP := $(shell $(SHELL) -c "command -v unzip || type
> > > -p unzip") -q +INSTALL := $(shell $(SHELL) -c "command -v
> > > install") +UNZIP := $(shell $(SHELL) -c "command -v unzip") -q
> > >  
> > >  APPLY_PATCHES = PATH=$(HOST_DIR)/bin:$$PATH
> > > support/scripts/apply-patches.sh $(if $(QUIET),-s)   
> > 
> > _______________________________________________
> > buildroot mailing list
> > buildroot@buildroot.org
> > https://lists.buildroot.org/mailman/listinfo/buildroot  
> 

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[Buildroot] [RFC PATCH 3/3] support/dependencies: don't check for `which'

[Petr Vorel]

It's requirement has been removed in previous commit.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
---
 support/dependencies/dependencies.sh | 2 --
 1 file changed, 2 deletions(-)

diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index e720e9372e..0502dcc9bb 100755
--- a/support/dependencies/dependencies.sh
+++ b/support/dependencies/dependencies.sh
@@ -65,8 +65,6 @@ check_prog_host()
 	fi
 }
 
-# Verify that which is installed
-check_prog_host "which"
 # Verify that sed is installed
 check_prog_host "sed"
 
-- 
2.33.0

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Re: [Buildroot] [RFC PATCH 0/3] make: support: use `command -v' instead of `which' *second try*

[Petr Vorel]

Hi all,

could anybody test this patchset please?

Kind regards,
Petr

> Hi all,

> this is a second attempt to introduce command -v.

> Changes v1->v2:
> * reproduced original issue and fixed by not relying to
>   $(shell command -v ...) but shell with:
>   $(shell $(SHELL) -c "command -v ...").
> * quote variables

> Tested only with make defconfig && make help >/dev/null


> Petr Vorel (3):
>   make: support: use `command -v' instead of `which'
>   make: Drop `type -p ...' fallback
>   support/dependencies: don't check for `which'

>  Makefile                                      | 22 +++++++++----------
>  package/Makefile.in                           |  8 +++----
>  support/dependencies/check-host-bison-flex.mk |  4 ++--
>  support/dependencies/check-host-cmake.sh      |  2 +-
>  support/dependencies/check-host-gzip.sh       |  2 +-
>  support/dependencies/check-host-lzip.sh       |  4 ++--
>  support/dependencies/check-host-python3.sh    |  2 +-
>  support/dependencies/check-host-tar.sh        |  4 ++--
>  support/dependencies/check-host-xzcat.sh      |  4 ++--
>  support/dependencies/dependencies.sh          | 18 +++++++--------
>  .../pkg-toolchain-external.mk                 |  2 +-
>  11 files changed, 35 insertions(+), 37 deletions(-)
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