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c4b681fd LC |
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 | ]) |