meson: generate pkg-config -uninstalled pc files

Generating those files is useful for users building the GStreamer stack
using meson and having to link it to another project which is still
using the autotools.

https://bugzilla.gnome.org/show_bug.cgi?id=776810

pkgconfig/Makefile.am

@@ -36,7 +36,21 @@ cp_verbose_0 = @echo "  CP     $@";
 %-@GST_API_VERSION@.pc: %.pc
 	$(cp_verbose_0)cp $< $@
 %-@GST_API_VERSION@-uninstalled.pc: %-uninstalled.pc
-	$(cp_verbose_0)cp $< $@
+### the uninstalled libdir is depend of the build system used so set it here
+### rather than hardcoding it in the file directly.
+	$(AM_V_GEN) sed \
+		-e "s|[@]allocatorslibdir[@]|$(abs_top_builddir)/gst-libs/gst/allocators/.libs|" \
+		-e "s|[@]audiolibdir[@]|$(abs_top_builddir)/gst-libs/gst/audio/.libs|" \
+		-e "s|[@]applibdir[@]|$(abs_top_builddir)/gst-libs/gst/app/.libs|" \
+		-e "s|[@]fftlibdir[@]|$(abs_top_builddir)/gst-libs/gst/fft/.libs|" \
+		-e "s|[@]pbutilslibdir[@]|$(abs_top_builddir)/gst-libs/gst/pbutils/.libs|" \
+		-e "s|[@]rifflibdir[@]|$(abs_top_builddir)/gst-libs/gst/riff/.libs|" \
+		-e "s|[@]rtplibdir[@]|$(abs_top_builddir)/gst-libs/gst/rtp/.libs|" \
+		-e "s|[@]rtsplibdir[@]|$(abs_top_builddir)/gst-libs/gst/rtsp/.libs|" \
+		-e "s|[@]sdplibdir[@]|$(abs_top_builddir)/gst-libs/gst/sdp/.libs|" \
+		-e "s|[@]taglibdir[@]|$(abs_top_builddir)/gst-libs/gst/tag/.libs|" \
+		-e "s|[@]videolibdir[@]|$(abs_top_builddir)/gst-libs/gst/video/.libs|" \
+		$< > $@.tmp && mv $@.tmp $@
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = $(pcverfiles)

pkgconfig/gstreamer-allocators-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/allocators/.libs
+libdir=@allocatorslibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/allocators

pkgconfig/gstreamer-app-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/app/.libs
+libdir=@applibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/app

pkgconfig/gstreamer-audio-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/audio/.libs
+libdir=@audiolibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/audio

pkgconfig/gstreamer-fft-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/fft/.libs
+libdir=@fftlibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/fft

pkgconfig/gstreamer-pbutils-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/pbutils/.libs
+libdir=@pbutilslibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/pbutils

pkgconfig/gstreamer-plugins-base-uninstalled.pc.in

@@ -10,7 +10,7 @@ Name: GStreamer Base Plugins Libraries, Uninstalled
 Description: Streaming media framework, base plugins libraries, uninstalled
 Version: @VERSION@
 Requires: gstreamer-@GST_API_VERSION@
-Libs: -L@abs_top_builddir@/gst-libs/gst/allocators/.libs -L@abs_top_builddir@/gst-libs/gst/app/.libs -L@abs_top_builddir@/gst-libs/gst/audio/.libs -L@abs_top_builddir@/gst-libs/gst/fft/.libs -L@abs_top_builddir@/gst-libs/gst/pbutils/.libs -L@abs_top_builddir@/gst-libs/gst/riff/.libs -L@abs_top_builddir@/gst-libs/gst/rtp/.libs -L@abs_top_builddir@/gst-libs/gst/rtsp/.libs -L@abs_top_builddir@/gst-libs/gst/sdp/.libs -L@abs_top_builddir@/gst-libs/gst/tag/.libs -L@abs_top_builddir@/gst-libs/gst/video/.libs
+Libs: -L@allocatorslibdir@ -L@applibdir@ -L@audiolibdir@ -L@fftlibdir@ -L@pbutilslibdir@ -L@rifflibdir@ -L@rtplibdir@ -L@rtsplibdir@ -L@sdplibdir@ -L@taglibdir@ -L@videolibdir@
 Cflags: -I@abs_top_srcdir@/gst-libs -I@abs_top_builddir@/gst-libs
 
 libraries=allocators app audio fft pbutils riff rtp rtsp sdp tag video

pkgconfig/gstreamer-riff-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/riff/.libs
+libdir=@rifflibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/riff

pkgconfig/gstreamer-rtp-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/rtp/.libs
+libdir=@rtplibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/rtp

pkgconfig/gstreamer-rtsp-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/rtsp/.libs
+libdir=@rtsplibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/rtsp

pkgconfig/gstreamer-sdp-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/sdp/.libs
+libdir=@sdplibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/sdp

pkgconfig/gstreamer-tag-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/tag/.libs
+libdir=@taglibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/tag

pkgconfig/gstreamer-video-uninstalled.pc.in

@@ -1,7 +1,7 @@
 # the standard variables don't make sense for an uninstalled copy
 prefix=
 exec_prefix=
-libdir=@abs_top_builddir@/gst-libs/gst/video/.libs
+libdir=@videolibdir@
 # includedir is builddir because it is used to find gstconfig.h in places
 includedir=@abs_top_builddir@/gst-libs
 girdir=@abs_top_builddir@/gst-libs/gst/video

pkgconfig/meson.build

@@ -7,6 +7,21 @@ pkgconf.set('includedir', '${prefix}/@0@'.format(get_option('includedir')))
 pkgconf.set('GST_API_VERSION', api_version)
 pkgconf.set('VERSION', gst_version)
 
+# needed for generating -uninstalled.pc files
+pkgconf.set('abs_top_builddir', join_paths(meson.current_build_dir(), '..'))
+pkgconf.set('abs_top_srcdir', join_paths(meson.current_source_dir(), '..'))
+pkgconf.set('allocatorslibdir', join_paths(meson.build_root(), gstallocators.outdir()))
+pkgconf.set('applibdir', join_paths(meson.build_root(), gstapp.outdir()))
+pkgconf.set('audiolibdir', join_paths(meson.build_root(), gstaudio.outdir()))
+pkgconf.set('fftlibdir', join_paths(meson.build_root(), gstfft.outdir()))
+pkgconf.set('pbutilslibdir', join_paths(meson.build_root(), pbutils.outdir()))
+pkgconf.set('rifflibdir', join_paths(meson.build_root(), gstriff.outdir()))
+pkgconf.set('rtplibdir', join_paths(meson.build_root(), gst_rtp.outdir()))
+pkgconf.set('rtsplibdir', join_paths(meson.build_root(), gst_rtsp.outdir()))
+pkgconf.set('sdplibdir', join_paths(meson.build_root(), gstsdp.outdir()))
+pkgconf.set('taglibdir', join_paths(meson.build_root(), gsttag.outdir()))
+pkgconf.set('videolibdir', join_paths(meson.build_root(), gstvideo.outdir()))
+
 pkg_install_dir = '@0@/pkgconfig'.format(get_option('libdir'))
 
 pkg_files = [
@@ -32,4 +47,10 @@ foreach p : pkg_files
     output : outfile,
     configuration : pkgconf,
     install_dir : pkg_install_dir)
+
+  infile = p + '-uninstalled.pc.in'
+  outfile = p + '-1.0-uninstalled.pc'
+  configure_file(input : infile,
+    output : outfile,
+    configuration : pkgconf)
 endforeach