From: Emil Velikov <emil.veli...@collabora.com> From the manual: Warn if an undefined identifier is evaluated in an `#if' directive.
This is something we want to know and address. Otherwise we can end up with subtle issues, in the less commonly used codepaths. Note: this will trigger a lot of extra warnings, with ~60 of those being unique. Once all those are resolved we'd want to promote the warning to an error. Cc: Matt Turner <matts...@gmail.com> Signed-off-by: Emil Velikov <emil.veli...@collabora.com> --- configure.ac | 2 ++ 1 file changed, 2 insertions(+) diff --git a/configure.ac b/configure.ac index 1344c12884f..ba7dda7b575 100644 --- a/configure.ac +++ b/configure.ac @@ -291,6 +291,7 @@ dnl dnl Check compiler flags dnl AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"]) +AX_CHECK_COMPILE_FLAG([-Wundef], [CFLAGS="$CFLAGS -Wundef"]) AX_CHECK_COMPILE_FLAG([-Werror=implicit-function-declaration], [CFLAGS="$CFLAGS -Werror=implicit-function-declaration"]) AX_CHECK_COMPILE_FLAG([-Werror=missing-prototypes], [CFLAGS="$CFLAGS -Werror=missing-prototypes"]) AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes], [CFLAGS="$CFLAGS -Wmissing-prototypes"]) @@ -303,6 +304,7 @@ dnl Check C++ compiler flags dnl AC_LANG_PUSH([C++]) AX_CHECK_COMPILE_FLAG([-Wall], [CXXFLAGS="$CXXFLAGS -Wall"]) +AX_CHECK_COMPILE_FLAG([-Wundef], [CXXFLAGS="$CXXFLAGS -Wundef"]) AX_CHECK_COMPILE_FLAG([-fno-math-errno], [CXXFLAGS="$CXXFLAGS -fno-math-errno"]) AX_CHECK_COMPILE_FLAG([-fno-trapping-math], [CXXFLAGS="$CXXFLAGS -fno-trapping-math"]) AX_CHECK_COMPILE_FLAG([-fvisibility=hidden], [VISIBILITY_CXXFLAGS="-fvisibility=hidden"]) -- 2.14.1 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
