When cross compiling a target gcc, target flags may be used on the host Configure identifies a number of warning flags (WARN_CFLAGS and WARN_CXXFLAGS) from the $CC value. The cross compiler may be different from the host compiler and may not support the same set of flags. This leads to problems such as: cc1plus: error: unrecognized command line option "-Wno-narrowing" cc1plus: error: unrecognized command line option "-Wno-overlength-strings" Work around this problem by removing the warning flags from the BUILD_CXXFLAGS value, in a way similar to the BUILD_CFLAGS. Upstream-Status: Pending Signed-off-by: Mark Hatle <mark.hatle@windriver.com> Index: gcc-4.8.0/gcc/configure =================================================================== --- gcc-4.8.0.orig/gcc/configure +++ gcc-4.8.0/gcc/configure @@ -11720,6 +10581,7 @@ STMP_FIXINC=stmp-fixinc if test x$build != x$host || test "x$coverage_flags" != x then BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)' + BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)' BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)' fi Index: gcc-4.8.0/gcc/configure.ac =================================================================== --- gcc-4.8.0.orig/gcc/configure.ac +++ gcc-4.8.0/gcc/configure.ac @@ -1901,6 +1901,7 @@ STMP_FIXINC=stmp-fixinc AC_SUBST(STMP_F if test x$build != x$host || test "x$coverage_flags" != x then BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)' + BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)' BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)' fi