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
diff --git a/configure b/configure
index c1e9ace..ab3936d 100755
--- 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
