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[gnupg.git] / m4 / inttypes_h.m4
1 # inttypes_h.m4 serial 7
2 dnl Copyright (C) 1997-2004, 2006 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
6
7 dnl From Paul Eggert.
8
9 # Define HAVE_INTTYPES_H_WITH_UINTMAX if <inttypes.h> exists,
10 # doesn't clash with <sys/types.h>, and declares uintmax_t.
11
12 AC_DEFUN([gl_AC_HEADER_INTTYPES_H],
13 [
14   AC_CACHE_CHECK([for inttypes.h], gl_cv_header_inttypes_h,
15   [AC_TRY_COMPILE(
16     [#include <sys/types.h>
17 #include <inttypes.h>],
18     [uintmax_t i = (uintmax_t) -1; return !i;],
19     gl_cv_header_inttypes_h=yes,
20     gl_cv_header_inttypes_h=no)])
21   if test $gl_cv_header_inttypes_h = yes; then
22     AC_DEFINE_UNQUOTED(HAVE_INTTYPES_H_WITH_UINTMAX, 1,
23       [Define if <inttypes.h> exists, doesn't clash with <sys/types.h>,
24        and declares uintmax_t. ])
25   fi
26 ])