rpi-userland: set rpath properly via cmake.

srcpkgs/rpi-userland/template

@@ -4,10 +4,11 @@ _gitshort="${_githash:0:7}"
 
 pkgname=rpi-userland
 version=20160205
-revision=2
+revision=3
 wrksrc="userland-${_githash}"
 build_style=cmake
 hostmakedepends="cmake"
+configure_args="-DCMAKE_INSTALL_RPATH=/opt/vc/lib"
 short_desc="Raspberry Pi GPU userland libraries and utilities (git ${_gitshort})"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
 license="3-clause-BSD"
@@ -15,8 +16,7 @@ homepage="https://github.com/raspberrypi/userland"
 distfiles="https://github.com/raspberrypi/userland/archive/${_githash}.tar.gz"
 checksum=5c25eb4de5feb11fdf74d58779f4cc615cda6623b81648ae15ae5e4ddf94c5ce
 
-LDFLAGS="-Wl,--no-as-needed -Wl,-rpath /opt/vc/lib"
-
+LDFLAGS="-Wl,--no-as-needed"
 only_for_archs="armv6l armv6l-musl armv7l armv7l-musl"
 
 shlib_provides="
@@ -37,9 +37,6 @@ shlib_provides="
  libGLESv2.so
  libEGL.so"
 
-post_extract() {
-	mkdir -p /opt/vc/lib
-}
 post_install() {
 	vmkdir usr/lib/pkgconfig
 	vcopy ${FILESDIR}/*.pc usr/lib/pkgconfig