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8e9c4e83fa
this checks for -AC99 or -c99 to get C99 structure init to work. It's
based on a similar macro metze did for Samba4.
the double sinclude() is weird, but I can't see any other way to use a
common config.m4 between libreplace and all the projects that use it
(This used to be commit 8d80024976)
43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
dnl C99 compiler check
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dnl -------------------------------------------------------
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dnl Copyright (C) Stefan (metze) Metzmacher 2004,2005
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dnl Released under the GNU GPL
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dnl -------------------------------------------------------
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dnl
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dnl adapted for libreplace by Andrew Tridgell
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############################################
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# Check if the compiler handles c99 struct initialization, and if not try -AC99 and -c99 flags
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# Usage: LIBREPLACE_CC_SUPPORTS_C99_STRUCT_INIT(success-action,failure-action)
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# changes CFLAGS to add -AC99 or -c99 if needed
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AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT],
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[
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AC_MSG_CHECKING(for C99 designated initializers)
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saved_CFLAGS="$CFLAGS";
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AC_TRY_COMPILE([#include <stdio.h>],
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[ struct foo {int x;char y;};
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struct foo bar = { .y = 'X', .x = 1 };
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],
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[AC_MSG_RESULT(yes); c99_init=yes; $1], [c99_init=no; AC_MSG_RESULT(no)])
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if test x"$c99_init" = x"no"; then
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AC_MSG_CHECKING(for C99 designated initializers with -AC99)
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CFLAGS="$saved_CFLAGS -AC99";
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AC_TRY_COMPILE([#include <stdio.h>],
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[ struct foo {int x;char y;};
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struct foo bar = { .y = 'X', .x = 1 };
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],
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[AC_MSG_RESULT(yes); c99_init=yes; $1],[AC_MSG_RESULT(no)])
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fi
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if test x"$c99_init" = x"no"; then
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AC_MSG_CHECKING(for C99 designated initializers with -c99)
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CFLAGS="$saved_CFLAGS -c99"
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AC_TRY_COMPILE([#include <stdio.h>],
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[ struct foo {int x;char y;};
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struct foo bar = { .y = 'X', .x = 1 };
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],
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[AC_MSG_RESULT(yes); $1],[AC_MSG_RESULT(no);CFLAGS="$saved_CFLAGS"; $2])
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fi
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])
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