1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
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_CC_SUPPORTS_C99_STRUCT_INIT(success-action,failure-action)
# changes CFLAGS to add -AC99 or -c99 if needed
AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT],
[
AC_MSG_CHECKING(for C99 designated initializers)
saved_CFLAGS="$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; $1], [c99_init=no; AC_MSG_RESULT(no)])
if test x"$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; $1],[AC_MSG_RESULT(no)])
fi
if test x"$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); $1],[AC_MSG_RESULT(no);CFLAGS="$saved_CFLAGS"; $2])
fi
])
|
