gst-libav: fix cross build for arm*

srcpkgs/gst-libav/template

@@ -1,7 +1,7 @@
 # Template file for 'gst-libav'
 pkgname=gst-libav
 version=1:1.4.5
-revision=3
+revision=4
 lib32disabled=yes
 wrksrc="${pkgname}-${version#*:}"
 build_style=gnu-configure
@@ -16,5 +16,12 @@ homepage="http://gstreamer.freedesktop.org"
 distfiles="${homepage}/src/${pkgname}/${pkgname}-${version#*:}.tar.xz"
 checksum=605c62624604f3bb5c870844cc1f2711779cc533b004c2aa1d8c0d58557afbbc
 
-# Required by musl for M_SQRT1_2
-CFLAGS="-D_XOPEN_SOURCE"
+case "$XBPS_TARGET_MACHINE" in
+	*-musl) # Required by musl for M_SQRT1_2
+		CFLAGS="-D_XOPEN_SOURCE"
+esac
+pre_configure() {
+	# Fix cross compiling for arm* where os=linuxeabihf
+	sed -i ${wrksrc}/gst-libs/ext/libav/configure \
+	 	-e "s;linux);linux*);"
+}