cross-*: restrict building only on native builds.

srcpkgs/cross-arm-linux-gnueabihf/template

@@ -35,6 +35,9 @@ depends="${pkgname}-libc-${version}_${revision}"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 only_for_archs="i686 x86_64"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
 
 _apply_patch() {
 	local pname="$(basename $1)"

srcpkgs/cross-arm-linux-gnueabihf7/template

@@ -35,6 +35,9 @@ depends="${pkgname}-libc-${version}_${revision}"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 only_for_archs="i686 x86_64"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
 
 _apply_patch() {
 	local pname="$(basename $1)"

srcpkgs/cross-arm-linux-musleabi/template

@@ -34,6 +34,10 @@ makedepends="libfl-devel zlib-devel gmp-devel mpfr-devel libmpc-devel"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 depends="${pkgname}-libc-${version}_${revision}"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
+
 _apply_patch() {
 	local pname="$(basename $1)"
 

srcpkgs/cross-i686-linux-musl/template

@@ -31,11 +31,10 @@ hostmakedepends="perl flex"
 makedepends="libfl-devel zlib-devel gmp-devel mpfr-devel libmpc-devel"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 depends="${pkgname}-libc-${version}_${revision}"
+only_for_archs="i686 x86_64 x86_64-musl"
 
-if [ "$XBPS_TARGET_MACHINE" = "i686-musl" ]; then
+if [ "$CROSS_BUILD" ]; then
-	# No need to build a cross compiler if we are running x86_64-musl.
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
-	msg_normal "${pkgname}-${version}: cannot be built on $XBPS_TARGET_MACHINE\n"
-	exit 0
 fi
 
 _apply_patch() {

srcpkgs/cross-i686-pc-linux-gnu/template

@@ -34,6 +34,10 @@ makedepends="zlib-devel gmp-devel mpfr-devel libmpc-devel"
 depends="${pkgname}-libc-${version}_${revision}"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
+
 _apply_patch() {
 	local pname="$(basename $1)"
 

srcpkgs/cross-mips-softfloat-linux-gnu/template

@@ -34,6 +34,10 @@ makedepends="zlib-devel gmp-devel mpfr-devel libmpc-devel"
 depends="${pkgname}-libc-${version}_${revision}"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
+
 _apply_patch() {
 	local pname="$(basename $1)"
 

srcpkgs/cross-mipsel-softfloat-linux-gnu/template

@@ -34,6 +34,10 @@ makedepends="zlib-devel gmp-devel mpfr-devel libmpc-devel"
 depends="${pkgname}-libc-${version}_${revision}"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 
+if [ "$CROSS_BUILD" ]; then
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
+fi
+
 _apply_patch() {
 	local pname="$(basename $1)"
 

srcpkgs/cross-x86_64-linux-musl/template

@@ -31,12 +31,12 @@ hostmakedepends="perl flex"
 makedepends="libfl-devel zlib-devel gmp-devel mpfr-devel libmpc-devel"
 nostrip_files="libgcc.a libgcov.a libgcc_eh.a"
 depends="${pkgname}-libc-${version}_${revision}"
+only_for_archs="i686 i686-musl x86_64"
 
-if [ "$XBPS_TARGET_MACHINE" = "x86_64-musl" ]; then
+if [ "$CROSS_BUILD" ]; then
-	# No need to build a cross compiler if we are running x86_64-musl.
+	msg_error "${pkgname}-${version}: cannot be cross compiled.\n"
-	msg_normal "${pkgname}-${version}: cannot be built on $XBPS_TARGET_MACHINE\n"
-	exit 0
 fi
+
 _apply_patch() {
 	local pname="$(basename $1)"