[Buildroot] [RFCv3 01/15] pkgconf: use relative path to STAGING_DIR instead of absolute path

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2017-12-01 21:53 +0100, Thomas Petazzoni spake thusly:
> The pkg-config wrapper script is currently generated with absolute
> paths to $(STAGING_DIR). However, this will not work properly with
> per-package SDK, and each package will be built with a different
> STAGING_DIR value.
> 
> In order to fix this, we adjust how the pkg-config wrapper script is
> generated, so that it uses a relative path to itself: the sysroot (i.e
> STAGING_DIR) is always located in $(path of
> pkg-config)/../$(STAGING_SUBDIR).
> 
> This change is independent from the per-package SDK work, and could be
> applied independently from it.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

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

Regards,
Yann E. MORIN.

> ---
> Changes since v2:
>  - None
> Changes since v1:
>  - As suggested by Arnout, simplify the generation of the pkg-config
>    script by doing only a replacement on @STAGING_SUBDIR@, the rest
>    being encoded inside the pkg-config script.
> ---
>  package/pkgconf/pkg-config.in | 5 ++++-
>  package/pkgconf/pkgconf.mk    | 3 +--
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/package/pkgconf/pkg-config.in b/package/pkgconf/pkg-config.in
> index 4dec48789a..b9ce0935cc 100644
> --- a/package/pkgconf/pkg-config.in
> +++ b/package/pkgconf/pkg-config.in
> @@ -1,2 +1,5 @@
>  #!/bin/sh
> -PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR:- at PKG_CONFIG_LIBDIR@} PKG_CONFIG_SYSROOT_DIR=${PKG_CONFIG_SYSROOT_DIR:- at STAGING_DIR@} $(dirname $0)/pkgconf @STATIC@ $@
> +PKGCONFDIR=$(dirname $0)
> +DEFAULT_PKG_CONFIG_LIBDIR=${PKGCONFDIR}/../@STAGING_SUBDIR@/usr/lib/pkgconfig:${PKGCONFDIR}/../@STAGING_SUBDIR@/usr/share/pkgconfig
> +DEFAULT_PKG_CONFIG_SYSROOT_DIR=${PKGCONFDIR}/../@STAGING_SUBDIR@
> +PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR:-${DEFAULT_PKG_CONFIG_LIBDIR}} PKG_CONFIG_SYSROOT_DIR=${PKG_CONFIG_SYSROOT_DIR:-${DEFAULT_PKG_CONFIG_SYSROOT_DIR}} ${PKGCONFDIR}/pkgconf @STATIC@ $@
> diff --git a/package/pkgconf/pkgconf.mk b/package/pkgconf/pkgconf.mk
> index cc190d26da..00b2d017ee 100644
> --- a/package/pkgconf/pkgconf.mk
> +++ b/package/pkgconf/pkgconf.mk
> @@ -19,8 +19,7 @@ endef
>  define HOST_PKGCONF_INSTALL_WRAPPER
>  	$(INSTALL) -m 0755 -D package/pkgconf/pkg-config.in \
>  		$(HOST_DIR)/bin/pkg-config
> -	$(SED) 's, at PKG_CONFIG_LIBDIR@,$(STAGING_DIR)/usr/lib/pkgconfig:$(STAGING_DIR)/usr/share/pkgconfig,' \
> -		-e 's, at STAGING_DIR@,$(STAGING_DIR),' \
> +	$(SED) 's, at STAGING_SUBDIR@,$(STAGING_SUBDIR),g' \
>  		$(HOST_DIR)/bin/pkg-config
>  endef
>  
> -- 
> 2.13.6
> 

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