1 # inttypes.m4 serial 27
2 dnl Copyright (C) 2006-2018 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.
7 dnl From Derek Price, Bruno Haible.
8 dnl Test whether <inttypes.h> is supported or must be substituted.
10 AC_DEFUN([gl_INTTYPES_H],
12 AC_REQUIRE([gl_INTTYPES_INCOMPLETE])
16 AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],
18 AC_REQUIRE([gl_STDINT_H])
19 AC_CHECK_HEADERS_ONCE([inttypes.h])
21 dnl Override <inttypes.h> always, so that the portability warnings work.
22 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
23 gl_CHECK_NEXT_HEADERS([inttypes.h])
25 AC_REQUIRE([gl_MULTIARCH])
27 dnl Check for declarations of anything we want to poison if the
28 dnl corresponding gnulib module is not in use.
29 gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>
30 ]], [imaxabs imaxdiv strtoimax strtoumax])
33 # Ensure that the PRI* and SCN* macros are defined appropriately.
34 AC_DEFUN([gl_INTTYPES_PRI_SCN],
36 AC_REQUIRE([gt_INTTYPES_PRI])
39 if test -n "$STDINT_H"; then
40 dnl Using the gnulib <stdint.h>. It always defines intptr_t to 'long'.
43 dnl Using the system's <stdint.h>.
44 for glpfx in '' l ll I64; do
47 l) gltype1='long int';;
48 ll) gltype1='long long int';;
49 I64) gltype1='__int64';;
52 [AC_LANG_PROGRAM([[#include <stdint.h>
54 extern $gltype1 foo;]])],
55 [PRIPTR_PREFIX='"'$glpfx'"'])
56 test -n "$PRIPTR_PREFIX" && break
59 AC_SUBST([PRIPTR_PREFIX])
61 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
62 [INT32_MAX_LT_INTMAX_MAX],
63 [defined INT32_MAX && defined INTMAX_MAX],
64 [INT32_MAX < INTMAX_MAX],
65 [sizeof (int) < sizeof (long long int)])
66 if test $APPLE_UNIVERSAL_BUILD = 0; then
67 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
68 [INT64_MAX_EQ_LONG_MAX],
70 [INT64_MAX == LONG_MAX],
71 [sizeof (long long int) == sizeof (long int)])
73 INT64_MAX_EQ_LONG_MAX=-1
75 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
76 [UINT32_MAX_LT_UINTMAX_MAX],
77 [defined UINT32_MAX && defined UINTMAX_MAX],
78 [UINT32_MAX < UINTMAX_MAX],
79 [sizeof (unsigned int) < sizeof (unsigned long long int)])
80 if test $APPLE_UNIVERSAL_BUILD = 0; then
81 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
82 [UINT64_MAX_EQ_ULONG_MAX],
84 [UINT64_MAX == ULONG_MAX],
85 [sizeof (unsigned long long int) == sizeof (unsigned long int)])
87 UINT64_MAX_EQ_ULONG_MAX=-1
91 # Define the symbol $1 to be 1 if the condition is true, 0 otherwise.
92 # If $2 is true, the condition is $3; otherwise if long long int is supported
93 # approximate the condition with $4; otherwise, assume the condition is false.
94 # The condition should work on all C99 platforms; the approximations should be
95 # good enough to work on all practical pre-C99 platforms.
96 # $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.
97 AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
99 AC_CACHE_CHECK([whether $3],
103 [[/* Work also in C++ mode. */
104 #define __STDC_LIMIT_MACROS 1
106 /* Work if build is not clean. */
107 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
115 #define CONDITION ($3)
116 #elif HAVE_LONG_LONG_INT
117 #define CONDITION ($4)
121 int test[CONDITION ? 1 : -1];]])],
123 [gl_cv_test_$1=no])])
124 if test $gl_cv_test_$1 = yes; then
132 AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],
134 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
135 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
136 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
139 AC_DEFUN([gl_INTTYPES_H_DEFAULTS],
141 GNULIB_IMAXABS=0; AC_SUBST([GNULIB_IMAXABS])
142 GNULIB_IMAXDIV=0; AC_SUBST([GNULIB_IMAXDIV])
143 GNULIB_STRTOIMAX=0; AC_SUBST([GNULIB_STRTOIMAX])
144 GNULIB_STRTOUMAX=0; AC_SUBST([GNULIB_STRTOUMAX])
145 dnl Assume proper GNU behavior unless another module says otherwise.
146 HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS])
147 HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV])
148 HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])
149 HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])
150 HAVE_IMAXDIV_T=1; AC_SUBST([HAVE_IMAXDIV_T])
151 REPLACE_STRTOIMAX=0; AC_SUBST([REPLACE_STRTOIMAX])
152 REPLACE_STRTOUMAX=0; AC_SUBST([REPLACE_STRTOUMAX])
153 INT32_MAX_LT_INTMAX_MAX=1; AC_SUBST([INT32_MAX_LT_INTMAX_MAX])
154 INT64_MAX_EQ_LONG_MAX='defined _LP64'; AC_SUBST([INT64_MAX_EQ_LONG_MAX])
155 PRI_MACROS_BROKEN=0; AC_SUBST([PRI_MACROS_BROKEN])
156 PRIPTR_PREFIX=__PRIPTR_PREFIX; AC_SUBST([PRIPTR_PREFIX])
157 UINT32_MAX_LT_UINTMAX_MAX=1; AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])
158 UINT64_MAX_EQ_ULONG_MAX='defined _LP64'; AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])