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dnl C99 compiler check
dnl -------------------------------------------------------
dnl Copyright (C) Stefan (metze) Metzmacher 2004,2005
dnl Released under the GNU GPL
dnl -------------------------------------------------------
dnl
dnl adapted for libreplace by Andrew Tridgell
############################################
# Check if the compiler handles c99 struct initialization, and if not try -AC99 and -c99 flags
# Usage: LIBREPLACE_C99_STRUCT_INIT(success-action,failure-action)
# changes CFLAGS to add -AC99 or -c99 if needed
AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT],
[
saved_CFLAGS="$CFLAGS";
c99_init=no
if test x"$c99_init" = x"no"; then
AC_MSG_CHECKING(for C99 designated initializers)
CFLAGS="$saved_CFLAGS";
AC_TRY_COMPILE([#include <stdio.h>],
[ struct foo {int x;char y;};
struct foo bar = { .y = 'X', .x = 1 };
],
[AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
AC_MSG_CHECKING(for C99 designated initializers with -AC99)
CFLAGS="$saved_CFLAGS -AC99";
AC_TRY_COMPILE([#include <stdio.h>],
[ struct foo {int x;char y;};
struct foo bar = { .y = 'X', .x = 1 };
],
[AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
AC_MSG_CHECKING(for C99 designated initializers with -c99)
CFLAGS="$saved_CFLAGS -c99"
AC_TRY_COMPILE([#include <stdio.h>],
[ struct foo {int x;char y;};
struct foo bar = { .y = 'X', .x = 1 };
],
[AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"yes"; then
saved_CFLAGS=""
$1
else
CFLAGS="$saved_CFLAGS"
saved_CFLAGS=""
$2
fi
])
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