package/grub: add a prereq check for 32 bits host development files when building on x86_64 (closes: #7753)

SVN-Revision: 22667

package/grub/Makefile

@@ -88,5 +88,16 @@ define Package/grub/install
 	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/* $(1)/usr/sbin/
 endef
 
+ifeq ($(HOST_ARCH),x86_64)
+  define Require/working-gcc-m32
+	echo 'int main(int argc, char **argv) { return 0; }' | \
+		gcc -x c -o $(TMP_DIR)/a.out - -m32 -lc
+  endef
+endif
+
+$(eval $(call Require,working-gcc-m32, \
+	Please install 32 bits development files. (gcc-multilib on Debian/Ubuntu, gcc.i686 and libgcc.i686 on CentOS/Fedora/RHEL) \
+))
+
 $(eval $(call HostBuild))
 $(eval $(call BuildPackage,grub))