[Mesa-dev] [PATCH 1/2] configure.ac: append to existing MSVC compat flags

[Emil Velikov]

From: Emil Velikov <emil.velikov at collabora.com>

Currently we were overwriting the existing warning flags, instead of
adding new [as applicable].

Fixes e4b2b69e828 ("configure: Add and use AX_CHECK_COMPILE_FLAG")
Cc: Matt Turner <mattst88 at gmail.com>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
 configure.ac | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index efc653ad7fa..1bba6c5b208 100644
--- a/configure.ac
+++ b/configure.ac
@@ -309,11 +309,11 @@ AC_LANG_POP([C++])
 # - non-Linux/Posix OpenGL portions needs to build on MSVC 2013 (which
 #   supports most of C99)
 # - the rest has no compiler compiler restrictions
-AX_CHECK_COMPILE_FLAG([-Werror=pointer-arith],                 [MSVC2013_COMPAT_CFLAGS="-Werror=pointer-arith"])
-AX_CHECK_COMPILE_FLAG([-Werror=vla],                           [MSVC2013_COMPAT_CFLAGS="-Werror=vla"])
+AX_CHECK_COMPILE_FLAG([-Werror=pointer-arith],                 [MSVC2013_COMPAT_CFLAGS="$MSVC2013_COMPAT_CFLAGS-Werror=pointer-arith"])
+AX_CHECK_COMPILE_FLAG([-Werror=vla],                           [MSVC2013_COMPAT_CFLAGS="$MSVC2013_COMPAT_CFLAGS -Werror=vla"])
 AC_LANG_PUSH([C++])
-AX_CHECK_COMPILE_FLAG([-Werror=pointer-arith],                 [MSVC2013_COMPAT_CXXFLAGS="-Werror=pointer-arith"])
-AX_CHECK_COMPILE_FLAG([-Werror=vla],                           [MSVC2013_COMPAT_CXXFLAGS="-Werror=vla"])
+AX_CHECK_COMPILE_FLAG([-Werror=pointer-arith],                 [MSVC2013_COMPAT_CXXFLAGS="$MSVC2013_COMPAT_CXXFLAGS -Werror=pointer-arith"])
+AX_CHECK_COMPILE_FLAG([-Werror=vla],                           [MSVC2013_COMPAT_CXXFLAGS="$MSVC2013_COMPAT_CXXFLAGS -Werror=vla"])
 AC_LANG_POP([C++])
 
 AC_SUBST([MSVC2013_COMPAT_CFLAGS])
-- 
2.14.1