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mesa/autoconf: attempt to use gnu99 on older gcc compilers 

anonymous structs/union don't work with c99 but do work with gnu99
on gcc 4.4.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2015-01-21 16:40:26 +10:00
parent 2e2087a9eb
commit ea9ae5d51a
1 changed files with 11 additions and 1 deletions
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12
configure.ac
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@ -145,6 +145,7 @@ AC_MSG_RESULT([$acv_mesa_CLANG])
dnl If we're using GCC, make sure that it is at least version 4.2.0. Older dnl If we're using GCC, make sure that it is at least version 4.2.0. Older
dnl versions are explictly not supported. dnl versions are explictly not supported.
GEN_ASM_OFFSETS=no GEN_ASM_OFFSETS=no
USE_GNU99=no
if test "x$GCC" = xyes -a "x$acv_mesa_CLANG" = xno; then if test "x$GCC" = xyes -a "x$acv_mesa_CLANG" = xno; then
AC_MSG_CHECKING([whether gcc version is sufficient]) AC_MSG_CHECKING([whether gcc version is sufficient])
major=0 major=0
@ -163,6 +164,9 @@ if test "x$GCC" = xyes -a "x$acv_mesa_CLANG" = xno; then
AC_MSG_RESULT([yes]) AC_MSG_RESULT([yes])
fi fi
if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 6 ; then
USE_GNU99=yes
fi
if test "x$cross_compiling" = xyes; then if test "x$cross_compiling" = xyes; then
GEN_ASM_OFFSETS=yes GEN_ASM_OFFSETS=yes
fi fi
@ -221,7 +225,13 @@ esac
dnl Add flags for gcc and g++ dnl Add flags for gcc and g++
if test "x$GCC" = xyes; then if test "x$GCC" = xyes; then
CFLAGS="$CFLAGS -Wall -std=c99" CFLAGS="$CFLAGS -Wall"
if test "x$USE_GNU99" = xyes; then
CFLAGS="$CFLAGS -std=gnu99"
else
CFLAGS="$CFLAGS -std=c99"
fi
# Enable -Werror=implicit-function-declaration and # Enable -Werror=implicit-function-declaration and
# -Werror=missing-prototypes, if available, or otherwise, just # -Werror=missing-prototypes, if available, or otherwise, just