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8d80024976
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
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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