[Buildroot] [PATCH v5 2/4] Makefile: export PATH including the Buildroot host bindirs

[Arnout Vandecappelle <arnout@mind.be>]

On 01/03/14 20:59, Samuel Martin wrote:
> This patch exports the PATH variable containing the factorized content
> of TARGET_PATH and HOST_PATH (because they were fairly similar).
> 
> TARGET_PATH and HOST_PATH are now set using only the PATH variable.
> 
> Signed-off-by: Samuel Martin <s.martin49@gmail.com>

 Looks good to me.

 Except... I'm having second thoughts about the principle of this patch.
When debugging failing builds, I often copy&paste the build command line
if I want to drill down to the details of the error. But if PATH is
exported (and TARGET_PATH is removed, in 4/4), it is no longer visible on
the command line... So I have to remember to set it myself...

 A workaround would be to add a 'make shell' target, that drops you into
an interactive shell. I don't really like it very much, but it would
solve other issues with exported variables.

 Regards,
 Arnout


> 
> ---
> changes v4 -> v5:
> - make my call: export PATH
>   - merge patch 7/7 into this one, so:
>   - do not use intermediate BR_PATH variable, just export PATH with th
>     right content
>   - now, HOST_PATH and TARGET_PATH are just $PATH
> - remove unrelevant comments (Arnout)
> 
> changes v3 -> v4:
> - rebase
> - rename BR2_PATH -> BR_PATH
> 
> changes v2 -> v3:
> - rebase
> 
> changes v1 -> v2:
> - rebase
> ---
>  Makefile            | 4 ++++
>  package/Makefile.in | 7 ++++---
>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index ae868da..97f9983 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -356,6 +356,10 @@ export STAGING_DIR
>  export HOST_DIR
>  export BINARIES_DIR
>  export BASE_DIR
> +# * Export the PATH including the Buildroot host bindirs with immediate
> +#   assignation to avoid recursive variable referencing issues triggered by make.
> +# * Quotes are needed for spaces and all in the original PATH content.
> +export PATH := "$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(HOST_DIR)/usr/sbin:$(PATH)"
>  
>  ################################################################################
>  #
> diff --git a/package/Makefile.in b/package/Makefile.in
> index 454f614..0ec237d 100644
> --- a/package/Makefile.in
> +++ b/package/Makefile.in
> @@ -144,8 +144,8 @@ else
>  TARGET_CROSS=$(HOST_DIR)/usr/bin/$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))-
>  endif
>  
> -# Quotes are needed for spaces et al in path components.
> -TARGET_PATH="$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(HOST_DIR)/usr/sbin/:$(PATH)"
> +# PATH already contains Buildroot host bindirs
> +TARGET_PATH = $(PATH)
>  
>  # Define TARGET_xx variables for all common binutils/gcc
>  TARGET_AR       = $(TARGET_CROSS)ar
> @@ -200,7 +200,8 @@ HOST_CFLAGS   ?= -O2
>  HOST_CFLAGS   += $(HOST_CPPFLAGS)
>  HOST_CXXFLAGS += $(HOST_CFLAGS)
>  HOST_LDFLAGS  += -L$(HOST_DIR)/lib -L$(HOST_DIR)/usr/lib -Wl,-rpath,$(HOST_DIR)/usr/lib
> -HOST_PATH=$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(PATH)
> +# PATH already contains Buildroot host bindirs
> +HOST_PATH = $(PATH)
>  
>  # hostcc version as an integer - E.G. 4.3.2 => 432
>  HOSTCC_VERSION:=$(shell $(HOSTCC_NOCCACHE) --version | \
> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F