[Buildroot] [PATCH v3 0/2] Portability fixes for "make menuconfig"

[Buildroot] [PATCH v3 0/2] Portability fixes for "make menuconfig"

[Bjørn Forsman]

Hi,

Here are two portability fixes needed to be able to run "make menuconfig" on
NixOS[1].

[1]: http://nixos.org/

Bj?rn Forsman (2):
  Makefile: pass host PKG_CONFIG_PATH at "make menuconfig" time
  kconfig/lxdialog: get ncurses CFLAGS with pkg-config

 Makefile                                           |  4 +-
 support/kconfig/lxdialog/check-lxdialog.sh         |  6 ++-
 ...dialog-get-ncurses-CFLAGS-with-pkg-config.patch | 50 ++++++++++++++++++++++
 support/kconfig/patches/series                     |  1 +
 4 files changed, 59 insertions(+), 2 deletions(-)
 mode change 100644 => 100755 support/kconfig/lxdialog/check-lxdialog.sh
 create mode 100644 support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch

Changes v2 -> v3:
  - fixup kconfig/lxdialog patch a/... b/... sub-paths (kconfig is located in
    different sub-directories in linux and buildroot) and apply the patch
    with quilt. (I apparently didn't test v2 properly; I thought the patch
    series were automatically applied by Buildroot, but it has to be applied
    manually and then committed.)
  - address comments from Yann:
    - use immediate assignment for HOST_PKG_CONFIG_PATH
    - drop unneeded export of HOST_PKG_CONFIG_PATH
    - drop unneeded sub-shell, place PKG_CONFIG_PATH in front of $(MAKE) instead
    - re-order patches
  - add quotes around expansion of $HOST_PKG_CONFIG_PATH

Changes v1 -> v2:
  - make the kconfig/lxdialog patch a separate patch file, instead of modifying
    the kconfig sources (which are synced with linux from time to time).
    Suggested by Thomas P.

-- 
2.1.3

[Buildroot] [PATCH v3 1/2] Makefile: pass host PKG_CONFIG_PATH at "make menuconfig" time

[Bjørn Forsman]

Buildroot unexports PKG_CONFIG_PATH in the top-level Makefile for purity
reasons. But it has an unfortunate side-effect in that "make menuconfig"
will not (necessarily) be able to pick up ncurses via host pkg-config,
breaking "make menuconfig" on systems where ncurses is installed in a
non-standard location.

This patch saves the original PKG_CONFIG_PATH variable in
HOST_PKG_CONFIG_PATH and restores the original PKG_CONFIG_PATH variable
only in the sub-processes that builds the various menuconfig/nconfig/...
targets.

(PKG_CONFIG_PATH has to be placed in front of the make command so that it
propagates to sub-processes. If given as an argument, it doesn't work.)

Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>
---
 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 5e0b4f2..0112853 100644
--- a/Makefile
+++ b/Makefile
@@ -264,6 +264,7 @@ export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTFC HOSTLD
 export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
 
 # Make sure pkg-config doesn't look outside the buildroot tree
+HOST_PKG_CONFIG_PATH := $(PKG_CONFIG_PATH)
 unexport PKG_CONFIG_PATH
 unexport PKG_CONFIG_SYSROOT_DIR
 unexport PKG_CONFIG_LIBDIR
@@ -692,7 +693,8 @@ export HOSTCFLAGS
 
 $(BUILD_DIR)/buildroot-config/%onf:
 	mkdir -p $(@D)/lxdialog
-	$(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)
+	PKG_CONFIG_PATH="$(HOST_PKG_CONFIG_PATH)" $(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" \
+	    obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)
 
 DEFCONFIG = $(call qstrip,$(BR2_DEFCONFIG))
 
-- 
2.1.3

[Buildroot] [PATCH v3 2/2] kconfig/lxdialog: get ncurses CFLAGS with pkg-config

[Bjørn Forsman]

This makes "make menuconfig" also work on systems where ncurses is not
installed in a standard location (such as on NixOS).

This patch changes ccflags() so that it tries pkg-config first, and only
if pkg-config fails does it go back to the fallback/manual checks. This
is the same algorithm that ldflags() already uses.

[This patch is already applied upstream (is part of linux v3.18):
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be8af2d54a66911693eddc556e4f7a866670082b

I'm adding this instead of doing a full upstream kconfig sync because
there was a conflict in one of the Buildroot kconfig patches (against
linux 3.18-rc1), which I was unable to resolve. Just drop this patch next time
Buildroot kconfig is synced against upstream.
]

Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>
---
 support/kconfig/lxdialog/check-lxdialog.sh         |  6 ++-
 ...dialog-get-ncurses-CFLAGS-with-pkg-config.patch | 50 ++++++++++++++++++++++
 support/kconfig/patches/series                     |  1 +
 3 files changed, 56 insertions(+), 1 deletion(-)
 mode change 100644 => 100755 support/kconfig/lxdialog/check-lxdialog.sh
 create mode 100644 support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch

diff --git a/support/kconfig/lxdialog/check-lxdialog.sh b/support/kconfig/lxdialog/check-lxdialog.sh
old mode 100644
new mode 100755
index 4789b72..3ce0a23
--- a/support/kconfig/lxdialog/check-lxdialog.sh
+++ b/support/kconfig/lxdialog/check-lxdialog.sh
@@ -21,7 +21,11 @@ ldflags()
 # Where is ncurses.h?
 ccflags()
 {
-	if [ -f /usr/include/ncursesw/curses.h ]; then
+	if pkg-config --cflags ncursesw 2>/dev/null; then
+		echo '-DCURSES_LOC="<ncurses.h>" -DNCURSES_WIDECHAR=1'
+	elif pkg-config --cflags ncurses 2>/dev/null; then
+		echo '-DCURSES_LOC="<ncurses.h>"'
+	elif [ -f /usr/include/ncursesw/curses.h ]; then
 		echo '-I/usr/include/ncursesw -DCURSES_LOC="<curses.h>"'
 		echo ' -DNCURSES_WIDECHAR=1'
 	elif [ -f /usr/include/ncurses/ncurses.h ]; then
diff --git a/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch b/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
new file mode 100644
index 0000000..1eb48ef
--- /dev/null
+++ b/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
@@ -0,0 +1,50 @@
+From be8af2d54a66911693eddc556e4f7a866670082b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
+Date: Sun, 14 Sep 2014 12:57:50 +0200
+Subject: [PATCH] kconfig/lxdialog: get ncurses CFLAGS with pkg-config
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This makes "make menuconfig" also work on systems where ncurses is not
+installed in a standard location (such as on NixOS).
+
+This patch changes ccflags() so that it tries pkg-config first, and only
+if pkg-config fails does it go back to the fallback/manual checks. This
+is the same algorithm that ldflags() already uses.
+
+Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>
+Signed-off-by: Michal Marek <mmarek@suse.cz>
+---
+[This patch is already applied upstream (is part of linux v3.18):
+https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be8af2d54a66911693eddc556e4f7a866670082b
+
+I'm adding this instead of doing a full upstream kconfig sync because
+there was a conflict in one of the Buildroot kconfig patches (against
+linux 3.18-rc1), which I was unable to resolve. Just drop this patch next time
+Buildroot kconfig is synced against upstream.
+]
+
+ scripts/kconfig/lxdialog/check-lxdialog.sh | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh
+index 9d2a4c5..5075ebf 100755
+--- a/lxdialog/check-lxdialog.sh
++++ b/lxdialog/check-lxdialog.sh
+@@ -21,7 +21,11 @@ ldflags()
+ # Where is ncurses.h?
+ ccflags()
+ {
+-	if [ -f /usr/include/ncursesw/curses.h ]; then
++	if pkg-config --cflags ncursesw 2>/dev/null; then
++		echo '-DCURSES_LOC="<ncurses.h>" -DNCURSES_WIDECHAR=1'
++	elif pkg-config --cflags ncurses 2>/dev/null; then
++		echo '-DCURSES_LOC="<ncurses.h>"'
++	elif [ -f /usr/include/ncursesw/curses.h ]; then
+ 		echo '-I/usr/include/ncursesw -DCURSES_LOC="<curses.h>"'
+ 		echo ' -DNCURSES_WIDECHAR=1'
+ 	elif [ -f /usr/include/ncurses/ncurses.h ]; then
+-- 
+2.1.3
+
diff --git a/support/kconfig/patches/series b/support/kconfig/patches/series
index 9154d83..e25375e 100644
--- a/support/kconfig/patches/series
+++ b/support/kconfig/patches/series
@@ -6,3 +6,4 @@
 14-support-out-of-tree-config.patch
 15-fix-qconf-moc-rule.patch
 16-fix-space-to-de-select-options.patch
+17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
-- 
2.1.3

[Buildroot] [PATCH v3 1/2] Makefile: pass host PKG_CONFIG_PATH at "make menuconfig" time

[Yann E. MORIN]

Bj?rn, All,

On 2015-01-03 00:58 +0100, Bj?rn Forsman spake thusly:
> Buildroot unexports PKG_CONFIG_PATH in the top-level Makefile for purity
> reasons. But it has an unfortunate side-effect in that "make menuconfig"
> will not (necessarily) be able to pick up ncurses via host pkg-config,
> breaking "make menuconfig" on systems where ncurses is installed in a
> non-standard location.
> 
> This patch saves the original PKG_CONFIG_PATH variable in
> HOST_PKG_CONFIG_PATH and restores the original PKG_CONFIG_PATH variable
> only in the sub-processes that builds the various menuconfig/nconfig/...
> targets.
> 
> (PKG_CONFIG_PATH has to be placed in front of the make command so that it
> propagates to sub-processes. If given as an argument, it doesn't work.)
> 
> Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>

Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Regards,
Yann E. MORIN.

> ---
>  Makefile | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 5e0b4f2..0112853 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -264,6 +264,7 @@ export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTFC HOSTLD
>  export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
>  
>  # Make sure pkg-config doesn't look outside the buildroot tree
> +HOST_PKG_CONFIG_PATH := $(PKG_CONFIG_PATH)
>  unexport PKG_CONFIG_PATH
>  unexport PKG_CONFIG_SYSROOT_DIR
>  unexport PKG_CONFIG_LIBDIR
> @@ -692,7 +693,8 @@ export HOSTCFLAGS
>  
>  $(BUILD_DIR)/buildroot-config/%onf:
>  	mkdir -p $(@D)/lxdialog
> -	$(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)
> +	PKG_CONFIG_PATH="$(HOST_PKG_CONFIG_PATH)" $(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" \
> +	    obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)
>  
>  DEFCONFIG = $(call qstrip,$(BR2_DEFCONFIG))
>  
> -- 
> 2.1.3
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH v3 2/2] kconfig/lxdialog: get ncurses CFLAGS with pkg-config

[Yann E. MORIN]

Bj?rn, All,

On 2015-01-03 00:58 +0100, Bj?rn Forsman spake thusly:
> This makes "make menuconfig" also work on systems where ncurses is not
> installed in a standard location (such as on NixOS).
> 
> This patch changes ccflags() so that it tries pkg-config first, and only
> if pkg-config fails does it go back to the fallback/manual checks. This
> is the same algorithm that ldflags() already uses.
> 
> [This patch is already applied upstream (is part of linux v3.18):
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be8af2d54a66911693eddc556e4f7a866670082b
> 
> I'm adding this instead of doing a full upstream kconfig sync because
> there was a conflict in one of the Buildroot kconfig patches (against
> linux 3.18-rc1), which I was unable to resolve. Just drop this patch next time
> Buildroot kconfig is synced against upstream.
> ]
> 
> Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>

Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Regards,
Yann E. MORIN.

> ---
>  support/kconfig/lxdialog/check-lxdialog.sh         |  6 ++-
>  ...dialog-get-ncurses-CFLAGS-with-pkg-config.patch | 50 ++++++++++++++++++++++
>  support/kconfig/patches/series                     |  1 +
>  3 files changed, 56 insertions(+), 1 deletion(-)
>  mode change 100644 => 100755 support/kconfig/lxdialog/check-lxdialog.sh
>  create mode 100644 support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
> 
> diff --git a/support/kconfig/lxdialog/check-lxdialog.sh b/support/kconfig/lxdialog/check-lxdialog.sh
> old mode 100644
> new mode 100755
> index 4789b72..3ce0a23
> --- a/support/kconfig/lxdialog/check-lxdialog.sh
> +++ b/support/kconfig/lxdialog/check-lxdialog.sh
> @@ -21,7 +21,11 @@ ldflags()
>  # Where is ncurses.h?
>  ccflags()
>  {
> -	if [ -f /usr/include/ncursesw/curses.h ]; then
> +	if pkg-config --cflags ncursesw 2>/dev/null; then
> +		echo '-DCURSES_LOC="<ncurses.h>" -DNCURSES_WIDECHAR=1'
> +	elif pkg-config --cflags ncurses 2>/dev/null; then
> +		echo '-DCURSES_LOC="<ncurses.h>"'
> +	elif [ -f /usr/include/ncursesw/curses.h ]; then
>  		echo '-I/usr/include/ncursesw -DCURSES_LOC="<curses.h>"'
>  		echo ' -DNCURSES_WIDECHAR=1'
>  	elif [ -f /usr/include/ncurses/ncurses.h ]; then
> diff --git a/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch b/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
> new file mode 100644
> index 0000000..1eb48ef
> --- /dev/null
> +++ b/support/kconfig/patches/17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
> @@ -0,0 +1,50 @@
> +From be8af2d54a66911693eddc556e4f7a866670082b Mon Sep 17 00:00:00 2001
> +From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
> +Date: Sun, 14 Sep 2014 12:57:50 +0200
> +Subject: [PATCH] kconfig/lxdialog: get ncurses CFLAGS with pkg-config
> +MIME-Version: 1.0
> +Content-Type: text/plain; charset=UTF-8
> +Content-Transfer-Encoding: 8bit
> +
> +This makes "make menuconfig" also work on systems where ncurses is not
> +installed in a standard location (such as on NixOS).
> +
> +This patch changes ccflags() so that it tries pkg-config first, and only
> +if pkg-config fails does it go back to the fallback/manual checks. This
> +is the same algorithm that ldflags() already uses.
> +
> +Signed-off-by: Bj?rn Forsman <bjorn.forsman@gmail.com>
> +Signed-off-by: Michal Marek <mmarek@suse.cz>
> +---
> +[This patch is already applied upstream (is part of linux v3.18):
> +https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be8af2d54a66911693eddc556e4f7a866670082b
> +
> +I'm adding this instead of doing a full upstream kconfig sync because
> +there was a conflict in one of the Buildroot kconfig patches (against
> +linux 3.18-rc1), which I was unable to resolve. Just drop this patch next time
> +Buildroot kconfig is synced against upstream.
> +]
> +
> + scripts/kconfig/lxdialog/check-lxdialog.sh | 6 +++++-
> + 1 file changed, 5 insertions(+), 1 deletion(-)
> +
> +diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh
> +index 9d2a4c5..5075ebf 100755
> +--- a/lxdialog/check-lxdialog.sh
> ++++ b/lxdialog/check-lxdialog.sh
> +@@ -21,7 +21,11 @@ ldflags()
> + # Where is ncurses.h?
> + ccflags()
> + {
> +-	if [ -f /usr/include/ncursesw/curses.h ]; then
> ++	if pkg-config --cflags ncursesw 2>/dev/null; then
> ++		echo '-DCURSES_LOC="<ncurses.h>" -DNCURSES_WIDECHAR=1'
> ++	elif pkg-config --cflags ncurses 2>/dev/null; then
> ++		echo '-DCURSES_LOC="<ncurses.h>"'
> ++	elif [ -f /usr/include/ncursesw/curses.h ]; then
> + 		echo '-I/usr/include/ncursesw -DCURSES_LOC="<curses.h>"'
> + 		echo ' -DNCURSES_WIDECHAR=1'
> + 	elif [ -f /usr/include/ncurses/ncurses.h ]; then
> +-- 
> +2.1.3
> +
> diff --git a/support/kconfig/patches/series b/support/kconfig/patches/series
> index 9154d83..e25375e 100644
> --- a/support/kconfig/patches/series
> +++ b/support/kconfig/patches/series
> @@ -6,3 +6,4 @@
>  14-support-out-of-tree-config.patch
>  15-fix-qconf-moc-rule.patch
>  16-fix-space-to-de-select-options.patch
> +17-kconfig-lxdialog-get-ncurses-CFLAGS-with-pkg-config.patch
> -- 
> 2.1.3
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH v3 0/2] Portability fixes for "make menuconfig"

[Thomas Petazzoni]

Dear Bj?rn Forsman,

On Sat,  3 Jan 2015 00:58:46 +0100, Bj?rn Forsman wrote:

> Bj?rn Forsman (2):
>   Makefile: pass host PKG_CONFIG_PATH at "make menuconfig" time
>   kconfig/lxdialog: get ncurses CFLAGS with pkg-config

Both patches applied, thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] [PATCH v3 0/2] Portability fixes for "make menuconfig"

[Bjørn Forsman]

On 7 January 2015 at 22:28, Thomas Petazzoni
<thomas.petazzoni@free-electrons.com> wrote:
> Dear Bj?rn Forsman,
>
> On Sat,  3 Jan 2015 00:58:46 +0100, Bj?rn Forsman wrote:
>
>> Bj?rn Forsman (2):
>>   Makefile: pass host PKG_CONFIG_PATH at "make menuconfig" time
>>   kconfig/lxdialog: get ncurses CFLAGS with pkg-config
>
> Both patches applied, thanks!

Weee! Thanks.

It is one year and seven days since I first posted that
kconfig/lxdialog patch to the upstream linux kbuild mailing list. Now
finally it is merged both upstream and in Buildroot :-)

Best regards,
Bj?rn Forsman

[Buildroot] [PATCH v3 0/2] Portability fixes for "make menuconfig"

[Thomas Petazzoni]

Dear Bj?rn Forsman,

On Wed, 7 Jan 2015 22:52:06 +0100, Bj?rn Forsman wrote:

> Weee! Thanks.
> 
> It is one year and seven days since I first posted that
> kconfig/lxdialog patch to the upstream linux kbuild mailing list. Now
> finally it is merged both upstream and in Buildroot :-)

Yeah, sorry for the long delay, thanks a lot for your persistence!

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com