[Buildroot] [PATCH 1/2] meson: add entry for libgcrypt-config in cross file

[Peter Seiderer <ps.report@gmx.net>]

Hello J?rg, Thomas,

On Sat, 13 Apr 2019 18:24:22 +0200, Thomas Petazzoni <thomas.petazzoni@bootlin.com> wrote:

> Hello J?rg,
> 
> +Peter Seiderer in Cc.
> 
> On Wed,  3 Apr 2019 20:32:01 +0200
> J?rg Krause <joerg.krause@embedded.rocks> wrote:
> 
> > Since version 0.49.0 the Meson build system has native support for
> > looking for `libgcrypt-config` if no pkg-config file is found. As the
> > latest version 1.8.4 of libgcrypt does not provide a .pc file, using
> > `libgcrypt-config` is the only way for detecting the required libraries
> > when linking agains libgrypt.
> > 
> > The `libgcrypt-config` entry is necessary for updating package mpd,
> > which switched from the Autotools to the Meson build system when bumping
> > from version 0.20 to 0.21.
> > 
> > Signed-off-by: J?rg Krause <joerg.krause@embedded.rocks>  
> 
> As I said in my previous reply, I'm not too happy with this
> libgcrypt-config variable creeping into the global cross-compilation
> file. Can we instead look at extending what Peter Seiderer is doing in
> http://patchwork.ozlabs.org/patch/1081486/ and allow some per-package
> additions to the per-package cross-compilation file ? Peter's patch
> does it for CFLAGS/CXXFLAGS/LDFLAGS, we could perhaps do the same with
> arbitrary program paths ?

Something like the following (draft) should work:

diff --git a/package/meson/cross-compilation.conf.in b/package/meson/cross-compilation.conf.in
index 4056c2b2f4..7cd372128e 100644
--- a/package/meson/cross-compilation.conf.in
+++ b/package/meson/cross-compilation.conf.in
@@ -9,6 +9,7 @@ cpp = '@TARGET_CROSS at g++'
 ar = '@TARGET_CROSS at ar'
 strip = '@TARGET_CROSS at strip'
 pkgconfig = '@HOST_DIR@/usr/bin/pkg-config'
+ at PKG_TARGET_BINARIES@
 
 [properties]
 needs_exe_wrapper = true
diff --git a/package/meson/meson.mk b/package/meson/meson.mk
index 70128f6bad..e550c80c9d 100644
--- a/package/meson/meson.mk
+++ b/package/meson/meson.mk
@@ -60,6 +60,7 @@ define HOST_MESON_INSTALL_CROSS_CONF
            -e "s%@TARGET_CFLAGS@%$(HOST_MESON_SED_CFLAGS)%g" \
            -e "s%@TARGET_LDFLAGS@%$(HOST_MESON_SED_LDFLAGS)%g" \
            -e "s%@TARGET_CXXFLAGS@%$(HOST_MESON_SED_CXXFLAGS)%g" \
+           -e "s%@PKG_TARGET_BINARIES@%%g" \
            -e "s%@PKG_TARGET_CFLAGS@%%g" \
            -e "s%@PKG_TARGET_LDFLAGS@%%g" \
            -e "s%@PKG_TARGET_CXXFLAGS@%%g" \
diff --git a/package/pkg-meson.mk b/package/pkg-meson.mk
index 9974b1e513..93df43fe3e 100644
--- a/package/pkg-meson.mk
+++ b/package/pkg-meson.mk
@@ -74,6 +74,7 @@ define $(2)_CONFIGURE_CMDS
            -e "s%@TARGET_CFLAGS@%$$(HOST_MESON_SED_CFLAGS)%g" \
            -e "s%@TARGET_LDFLAGS@%$$(HOST_MESON_SED_LDFLAGS)%g" \
            -e "s%@TARGET_CXXFLAGS@%$$(HOST_MESON_SED_CXXFLAGS)%g" \
+           -e "s%@PKG_TARGET_BINARIES@%$$($$(PKG)_MESON_BINARIES)%g" \
            -e "s%@PKG_TARGET_CFLAGS@%$$($$(PKG)_MESON_SED_CFLAGS)%g" \
            -e "s%@PKG_TARGET_LDFLAGS@%$$($$(PKG)_MESON_SED_LDFLAGS)%g" \
            -e "s%@PKG_TARGET_CXXFLAGS@%$$($$(PKG)_MESON_SED_CXXFLAGS)%g" \


and with: 

MPD_MESON_BINARIES = libgcrypt-config = '$(STAGING_DIR)/usr/bin/libgcrypt-config'

Regards,
Peter

> 
> Thanks!
> 
> Thomas