libGL: fix cross build for ppc* from x86_64*

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/libGL/template

@@ -47,8 +47,8 @@ ppc*)
 	# Enable all ppc drivers.
 	configure_args+=" -Dgallium-drivers=r300,r600,radeonsi,swrast,nouveau,virgl"
 	configure_args+=" -Ddri-drivers=r100,r200,nouveau"
-	configure_args+=" -Dvulkan-drivers=amd"
 	configure_args+=" -Dgallium-xa=false -Ddri3=true -Dgallium-opencl=icd"
+	configure_args+=" -Dvulkan-drivers=amd"
 	# Explicitly control power8 feature usage, disable on BE
 	case "$XBPS_TARGET_MACHINE" in
 		ppc64le*) configure_args+=" -Dpower8=true";;
@@ -103,6 +103,16 @@ case "$XBPS_TARGET_MACHINE" in
 	*) configure_args+=" -Dglx=dri";;
 esac
 
+post_configure() {
+	if [ "$CROSS_BUILD" ]; then
+		find -iname "*.ninja" -exec sed -i "{}" \
+			-e "s; /usr/lib/; ${XBPS_CROSS_BASE}/usr/lib/;g" \
+			-e "s;-L/usr/lib;-L${XBPS_CROSS_BASE}/usr/lib;g" \
+			-e "s;-I/usr/include;-I${XBPS_CROSS_BASE}/usr/include;g" \
+			\;
+	fi
+}
+
 post_install() {
 	vlicense docs/license.html
 	vmkdir usr/lib/xorg/modules/extensions