shithub: libvpx

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Generate a vpx.pc file for pkg-config.

Rules are added to libs.mk to generate a vpx.pc, which is
installed as pkgconfig/vpx.pc under the target library directory.
This also requires the install path prefix be exported directly
in config.mk.

Some systems use a tool called pkg-config to query information
about intalled libraries or other resources, based on database
files provided by the packages themselves at install time.

Providing such a file for libvpx simplifies integration with
other build systems, and provides an easy avenue for developers
to test against their own builds of the library.

Change-Id: I4e32a8fbb53fc331aa95eb207c63dd70a76d18ed

--- a/configure

+++ b/configure

@@ -386,6 +386,8 @@

         VERSION_MAJOR=${ver%.*}

     fi

     enabled child || cat <<EOF >> config.mk

+

+PREFIX=${prefix}

 ifeq (\$(MAKECMDGOALS),dist)

 DIST_DIR?=${DIST_DIR}

 else

--- a/libs.mk

+++ b/libs.mk

@@ -204,6 +204,26 @@

 INSTALL-LIBS-$(CONFIG_SHARED) += $(LIBVPX_SO_SYMLINKS)

 INSTALL-LIBS-$(CONFIG_SHARED) += $(LIBSUBDIR)/$(LIBVPX_SO)

+

+LIBS-$(BUILD_LIBVPX) += vpx.pc

+vpx.pc: config.mk libs.mk

+	@echo "    [CREATE] $@"

+	$(qexec)echo '# pkg-config file from libvpx $(VERSION_STRING)' > $@

+	$(qexec)echo 'prefix=$(PREFIX)' >> $@

+	$(qexec)echo 'exec_prefix=$${prefix}' >> $@

+	$(qexec)echo 'libdir=$${prefix}/lib' >> $@

+	$(qexec)echo 'includedir=$${prefix}/include' >> $@

+	$(qexec)echo '' >> $@

+	$(qexec)echo 'Name: vpx' >> $@

+	$(qexec)echo 'Description: WebM Project VPx codec implementation' >> $@

+	$(qexec)echo 'Version: $(VERSION_MAJOR).$(VERSION_MINOR).$(VERSION_PATCH)' >> $@

+	$(qexec)echo 'Requires:' >> $@

+	$(qexec)echo 'Conflicts:' >> $@

+	$(qexec)echo 'Libs: -L$${libdir} -lvpx' >> $@

+	$(qexec)echo 'Cflags: -I$${includedir}' >> $@

+INSTALL-LIBS-yes += $(LIBSUBDIR)/pkgconfig/vpx.pc

+INSTALL_MAPS += $(LIBSUBDIR)/pkgconfig/%.pc %.pc

+CLEAN-OBJS += vpx.pc

 endif

 LIBS-$(LIPO_LIBVPX) += libvpx.a