3 dnl Copyright (C) 2006-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl From Derek Price, Bruno Haible.
9 dnl Test whether <inttypes.h> is supported or must be substituted.
11 AC_DEFUN_ONCE([gl_INTTYPES_H],
13 AC_REQUIRE([gl_INTTYPES_INCOMPLETE])
17 AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],
19 AC_REQUIRE([gl_STDINT_H])
20 AC_CHECK_HEADERS_ONCE([inttypes.h])
22 dnl Override <inttypes.h> always, so that the portability warnings work.
23 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
24 gl_CHECK_NEXT_HEADERS([inttypes.h])
26 AC_REQUIRE([gl_MULTIARCH])
28 dnl Check for declarations of anything we want to poison if the
29 dnl corresponding gnulib module is not in use.
30 gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>
31 ]], [imaxabs imaxdiv strtoimax strtoumax])
33 AC_REQUIRE([AC_C_RESTRICT])
36 # Ensure that the PRI* and SCN* macros are defined appropriately.
37 AC_DEFUN([gl_INTTYPES_PRI_SCN],
40 if $GL_GENERATE_STDINT_H; then
41 dnl Using the gnulib <stdint.h>. It defines intptr_t to 'long' or
42 dnl 'long long', depending on _WIN64.
50 [PRIPTR_PREFIX='"l"'],
51 [PRIPTR_PREFIX='"ll"'])
53 dnl Using the system's <stdint.h>.
54 for glpfx in '' l ll I64; do
57 l) gltype1='long int';;
58 ll) gltype1='long long int';;
59 I64) gltype1='__int64';;
62 [AC_LANG_PROGRAM([[#include <stdint.h>
64 extern $gltype1 foo;]])],
65 [PRIPTR_PREFIX='"'$glpfx'"'])
66 test -n "$PRIPTR_PREFIX" && break
69 AC_SUBST([PRIPTR_PREFIX])
71 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
72 [INT32_MAX_LT_INTMAX_MAX],
73 [defined INT32_MAX && defined INTMAX_MAX],
74 [INT32_MAX < INTMAX_MAX],
75 [sizeof (int) < sizeof (long long int)])
76 if test $APPLE_UNIVERSAL_BUILD = 0; then
77 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
78 [INT64_MAX_EQ_LONG_MAX],
80 [INT64_MAX == LONG_MAX],
81 [sizeof (long long int) == sizeof (long int)])
83 INT64_MAX_EQ_LONG_MAX=-1
85 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
86 [UINT32_MAX_LT_UINTMAX_MAX],
87 [defined UINT32_MAX && defined UINTMAX_MAX],
88 [UINT32_MAX < UINTMAX_MAX],
89 [sizeof (unsigned int) < sizeof (unsigned long long int)])
90 if test $APPLE_UNIVERSAL_BUILD = 0; then
91 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
92 [UINT64_MAX_EQ_ULONG_MAX],
94 [UINT64_MAX == ULONG_MAX],
95 [sizeof (unsigned long long int) == sizeof (unsigned long int)])
97 UINT64_MAX_EQ_ULONG_MAX=-1
101 # Define the symbol $1 to be 1 if the condition is true, 0 otherwise.
102 # If $2 is true, the condition is $3; otherwise if long long int is supported
103 # approximate the condition with $4; otherwise, assume the condition is false.
104 # The condition should work on all C99 platforms; the approximations should be
105 # good enough to work on all practical pre-C99 platforms.
106 # $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.
107 AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
109 AC_CACHE_CHECK([whether $3],
113 [[/* Work also in C++ mode. */
114 #define __STDC_LIMIT_MACROS 1
116 /* Work if build is not clean. */
117 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
125 #define CONDITION ($3)
127 #define CONDITION ($4)
129 int test[CONDITION ? 1 : -1];]])],
131 [gl_cv_test_$1=no])])
132 if test $gl_cv_test_$1 = yes; then
140 # gl_INTTYPES_MODULE_INDICATOR([modulename])
141 # sets the shell variable that indicates the presence of the given module
142 # to a C preprocessor expression that will evaluate to 1.
143 # This macro invocation must not occur in macros that are AC_REQUIREd.
144 AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],
146 dnl Ensure to expand the default settings once only.
147 gl_INTTYPES_H_REQUIRE_DEFAULTS
148 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
151 # Initializes the default values for AC_SUBSTed shell variables.
152 # This macro must not be AC_REQUIREd. It must only be invoked, and only
153 # outside of macros or in macros that are not AC_REQUIREd.
154 AC_DEFUN([gl_INTTYPES_H_REQUIRE_DEFAULTS],
156 m4_defun(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS], [
157 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXABS])
158 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXDIV])
159 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOIMAX])
160 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOUMAX])
162 m4_require(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS])
163 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
166 AC_DEFUN([gl_INTTYPES_H_DEFAULTS],
168 dnl Assume proper GNU behavior unless another module says otherwise.
169 HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS])
170 HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV])
171 HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])
172 HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])
173 HAVE_IMAXDIV_T=1; AC_SUBST([HAVE_IMAXDIV_T])
174 HAVE_IMAXABS=1; AC_SUBST([HAVE_IMAXABS])
175 HAVE_IMAXDIV=1; AC_SUBST([HAVE_IMAXDIV])
176 REPLACE_IMAXABS=0; AC_SUBST([REPLACE_IMAXABS])
177 REPLACE_IMAXDIV=0; AC_SUBST([REPLACE_IMAXDIV])
178 REPLACE_STRTOIMAX=0; AC_SUBST([REPLACE_STRTOIMAX])
179 REPLACE_STRTOUMAX=0; AC_SUBST([REPLACE_STRTOUMAX])
180 INT32_MAX_LT_INTMAX_MAX=1; AC_SUBST([INT32_MAX_LT_INTMAX_MAX])
181 INT64_MAX_EQ_LONG_MAX='defined _LP64'; AC_SUBST([INT64_MAX_EQ_LONG_MAX])
182 PRIPTR_PREFIX=__PRIPTR_PREFIX; AC_SUBST([PRIPTR_PREFIX])
183 UINT32_MAX_LT_UINTMAX_MAX=1; AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])
184 UINT64_MAX_EQ_ULONG_MAX='defined _LP64'; AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])