Some of the latest compiler warnings flags are not available on older compilers so this adds macros to test they are supported Signed-off-by: Justin Mitchell <jumitche@xxxxxxxxxx> --- configure.ac | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/configure.ac b/configure.ac index f4eba1f..e0c9039 100644 --- a/configure.ac +++ b/configure.ac @@ -550,7 +550,6 @@ my_am_cflags="\ -Werror=strict-prototypes \ -Werror=missing-prototypes \ -Werror=missing-declarations \ - -Werror=format-overflow=2 \ -Werror=format=2 \ -Werror=undef \ -Werror=missing-include-dirs \ @@ -560,15 +559,29 @@ my_am_cflags="\ -Werror=return-type \ -Werror=switch \ -Werror=overflow \ - -Werror=int-conversion \ -Werror=parentheses \ - -Werror=incompatible-pointer-types \ - -Werror=misleading-indentation \ -Werror=aggregate-return \ -Werror=unused-result \ -fno-strict-aliasing \ " +AC_DEFUN([CHECK_CCSUPPORT], [ + my_save_cflags="$CFLAGS" + CFLAGS=$1 + AC_MSG_CHECKING([whether CC supports $1]) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + [AC_MSG_RESULT([yes])] + [$2+=$1], + [AC_MSG_RESULT([no])] + ) + CFLAGS="$my_save_cflags" +]) + +CHECK_CCSUPPORT([-Werror=format-overflow=2], [my_am_cflags]) +CHECK_CCSUPPORT([-Werror=int-conversion], [my_am_cflags]) +CHECK_CCSUPPORT([-Werror=incompatible-pointer-types], [my_am_cflags]) +CHECK_CCSUPPORT([-Werror=misleading-indentation], [my_am_cflags]) + AC_SUBST([AM_CFLAGS], ["$my_am_cflags"]) # Make sure that $ACLOCAL_FLAGS are used during a rebuild -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
