|
267
|
1 # intmax_t.m4 serial 7
|
|
|
2 dnl Copyright (C) 1997-2004, 2006-2007, 2009 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 AC_PREREQ([2.13])
|
|
|
10
|
|
|
11 # Define intmax_t to 'long' or 'long long'
|
|
|
12 # if it is not already defined in <stdint.h> or <inttypes.h>.
|
|
|
13
|
|
|
14 AC_DEFUN([gl_AC_TYPE_INTMAX_T],
|
|
|
15 [
|
|
|
16 dnl For simplicity, we assume that a header file defines 'intmax_t' if and
|
|
|
17 dnl only if it defines 'uintmax_t'.
|
|
|
18 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
|
|
|
19 AC_REQUIRE([gl_AC_HEADER_STDINT_H])
|
|
|
20 if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then
|
|
|
21 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
|
|
|
22 test $ac_cv_type_long_long_int = yes \
|
|
|
23 && ac_type='long long' \
|
|
|
24 || ac_type='long'
|
|
|
25 AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
|
|
|
26 [Define to long or long long if <inttypes.h> and <stdint.h> don't define.])
|
|
|
27 else
|
|
|
28 AC_DEFINE([HAVE_INTMAX_T], [1],
|
|
|
29 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
|
|
|
30 fi
|
|
|
31 ])
|
|
|
32
|
|
|
33 dnl An alternative would be to explicitly test for 'intmax_t'.
|
|
|
34
|
|
|
35 AC_DEFUN([gt_AC_TYPE_INTMAX_T],
|
|
|
36 [
|
|
|
37 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
|
|
|
38 AC_REQUIRE([gl_AC_HEADER_STDINT_H])
|
|
|
39 AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
|
|
|
40 [AC_TRY_COMPILE([
|
|
|
41 #include <stddef.h>
|
|
|
42 #include <stdlib.h>
|
|
|
43 #if HAVE_STDINT_H_WITH_UINTMAX
|
|
|
44 #include <stdint.h>
|
|
|
45 #endif
|
|
|
46 #if HAVE_INTTYPES_H_WITH_UINTMAX
|
|
|
47 #include <inttypes.h>
|
|
|
48 #endif
|
|
|
49 ], [intmax_t x = -1; return !x;], gt_cv_c_intmax_t=yes, gt_cv_c_intmax_t=no)])
|
|
|
50 if test $gt_cv_c_intmax_t = yes; then
|
|
|
51 AC_DEFINE([HAVE_INTMAX_T], [1],
|
|
|
52 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
|
|
|
53 else
|
|
|
54 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
|
|
|
55 test $ac_cv_type_long_long_int = yes \
|
|
|
56 && ac_type='long long' \
|
|
|
57 || ac_type='long'
|
|
|
58 AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
|
|
|
59 [Define to long or long long if <stdint.h> and <inttypes.h> don't define.])
|
|
|
60 fi
|
|
|
61 ])
|
