libmusicbrainz5: fix cross

srcpkgs/libmusicbrainz5/template

@@ -1,7 +1,7 @@
 # Template file for 'libmusicbrainz5'
 pkgname=libmusicbrainz5
 version=5.1.0
-revision=2
+revision=3
 build_style=cmake
 wrksrc="libmusicbrainz-${version}"
 hostmakedepends="pkg-config"
@@ -13,6 +13,24 @@ homepage="http://musicbrainz.org/"
 distfiles="https://github.com/metabrainz/libmusicbrainz/releases/download/release-${version}/libmusicbrainz-${version}.tar.gz"
 checksum=6749259e89bbb273f3f5ad7acdffb7c47a2cf8fcaeab4c4695484cef5f4c6b46
 
+if [ "$CROSS_BUILD" ]; then
+	hostmakedepends+=" ${makedepends}"
+fi
+
+pre_configure() {
+	# Building for the host architecture is needed to generate C interface source files
+	# see https://github.com/metabrainz/libmusicbrainz/blob/master/INSTALL.txt
+	if [ "$CROSS_BUILD" ]; then
+		mkdir build-native
+		cd build-native
+	        CC=${CC_host} CFLAGS=${XBPS_CFLAGS} CXX=${CXX_host} \
+		CXXFLAGS=${XBPS_CXXFLAGS} LDFLAGS=${XBPS_LDFLAGS} cmake ..
+		make -j ${makejobs} make-c-interface
+		configure_args+=" -DIMPORT_EXECUTABLES=../build-native/ImportExecutables.cmake"
+		cd ..
+	fi
+}
+
 libmusicbrainz5-devel_package() {
 	depends="${makedepends} ${sourcepkg}>=${version}_${revision}"
 	short_desc+=" -- development files"