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Diffstat (limited to 'gl/m4/inttypes.m4')
-rw-r--r-- | gl/m4/inttypes.m4 | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/gl/m4/inttypes.m4 b/gl/m4/inttypes.m4 new file mode 100644 index 0000000..bf2eab2 --- /dev/null +++ b/gl/m4/inttypes.m4 | |||
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1 | # inttypes.m4 serial 36 | ||
2 | dnl Copyright (C) 2006-2023 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 Derek Price, Bruno Haible. | ||
8 | dnl Test whether <inttypes.h> is supported or must be substituted. | ||
9 | |||
10 | AC_DEFUN_ONCE([gl_INTTYPES_H], | ||
11 | [ | ||
12 | AC_REQUIRE([gl_INTTYPES_INCOMPLETE]) | ||
13 | gl_INTTYPES_PRI_SCN | ||
14 | ]) | ||
15 | |||
16 | AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE], | ||
17 | [ | ||
18 | AC_REQUIRE([gl_STDINT_H]) | ||
19 | AC_CHECK_HEADERS_ONCE([inttypes.h]) | ||
20 | |||
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]) | ||
24 | |||
25 | AC_REQUIRE([gl_MULTIARCH]) | ||
26 | |||
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]) | ||
31 | |||
32 | AC_REQUIRE([AC_C_RESTRICT]) | ||
33 | ]) | ||
34 | |||
35 | # Ensure that the PRI* and SCN* macros are defined appropriately. | ||
36 | AC_DEFUN([gl_INTTYPES_PRI_SCN], | ||
37 | [ | ||
38 | PRIPTR_PREFIX= | ||
39 | if $GL_GENERATE_STDINT_H; then | ||
40 | dnl Using the gnulib <stdint.h>. It defines intptr_t to 'long' or | ||
41 | dnl 'long long', depending on _WIN64. | ||
42 | AC_COMPILE_IFELSE( | ||
43 | [AC_LANG_PROGRAM([[ | ||
44 | #ifdef _WIN64 | ||
45 | LLP64 | ||
46 | #endif | ||
47 | ]]) | ||
48 | ], | ||
49 | [PRIPTR_PREFIX='"l"'], | ||
50 | [PRIPTR_PREFIX='"ll"']) | ||
51 | else | ||
52 | dnl Using the system's <stdint.h>. | ||
53 | for glpfx in '' l ll I64; do | ||
54 | case $glpfx in | ||
55 | '') gltype1='int';; | ||
56 | l) gltype1='long int';; | ||
57 | ll) gltype1='long long int';; | ||
58 | I64) gltype1='__int64';; | ||
59 | esac | ||
60 | AC_COMPILE_IFELSE( | ||
61 | [AC_LANG_PROGRAM([[#include <stdint.h> | ||
62 | extern intptr_t foo; | ||
63 | extern $gltype1 foo;]])], | ||
64 | [PRIPTR_PREFIX='"'$glpfx'"']) | ||
65 | test -n "$PRIPTR_PREFIX" && break | ||
66 | done | ||
67 | fi | ||
68 | AC_SUBST([PRIPTR_PREFIX]) | ||
69 | |||
70 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | ||
71 | [INT32_MAX_LT_INTMAX_MAX], | ||
72 | [defined INT32_MAX && defined INTMAX_MAX], | ||
73 | [INT32_MAX < INTMAX_MAX], | ||
74 | [sizeof (int) < sizeof (long long int)]) | ||
75 | if test $APPLE_UNIVERSAL_BUILD = 0; then | ||
76 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | ||
77 | [INT64_MAX_EQ_LONG_MAX], | ||
78 | [defined INT64_MAX], | ||
79 | [INT64_MAX == LONG_MAX], | ||
80 | [sizeof (long long int) == sizeof (long int)]) | ||
81 | else | ||
82 | INT64_MAX_EQ_LONG_MAX=-1 | ||
83 | fi | ||
84 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | ||
85 | [UINT32_MAX_LT_UINTMAX_MAX], | ||
86 | [defined UINT32_MAX && defined UINTMAX_MAX], | ||
87 | [UINT32_MAX < UINTMAX_MAX], | ||
88 | [sizeof (unsigned int) < sizeof (unsigned long long int)]) | ||
89 | if test $APPLE_UNIVERSAL_BUILD = 0; then | ||
90 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | ||
91 | [UINT64_MAX_EQ_ULONG_MAX], | ||
92 | [defined UINT64_MAX], | ||
93 | [UINT64_MAX == ULONG_MAX], | ||
94 | [sizeof (unsigned long long int) == sizeof (unsigned long int)]) | ||
95 | else | ||
96 | UINT64_MAX_EQ_ULONG_MAX=-1 | ||
97 | fi | ||
98 | ]) | ||
99 | |||
100 | # Define the symbol $1 to be 1 if the condition is true, 0 otherwise. | ||
101 | # If $2 is true, the condition is $3; otherwise if long long int is supported | ||
102 | # approximate the condition with $4; otherwise, assume the condition is false. | ||
103 | # The condition should work on all C99 platforms; the approximations should be | ||
104 | # good enough to work on all practical pre-C99 platforms. | ||
105 | # $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants. | ||
106 | AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION], | ||
107 | [ | ||
108 | AC_CACHE_CHECK([whether $3], | ||
109 | [gl_cv_test_$1], | ||
110 | [AC_COMPILE_IFELSE( | ||
111 | [AC_LANG_PROGRAM( | ||
112 | [[/* Work also in C++ mode. */ | ||
113 | #define __STDC_LIMIT_MACROS 1 | ||
114 | |||
115 | /* Work if build is not clean. */ | ||
116 | #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H | ||
117 | |||
118 | #include <limits.h> | ||
119 | #if HAVE_STDINT_H | ||
120 | #include <stdint.h> | ||
121 | #endif | ||
122 | |||
123 | #if $2 | ||
124 | #define CONDITION ($3) | ||
125 | #else | ||
126 | #define CONDITION ($4) | ||
127 | #endif | ||
128 | int test[CONDITION ? 1 : -1];]])], | ||
129 | [gl_cv_test_$1=yes], | ||
130 | [gl_cv_test_$1=no])]) | ||
131 | if test $gl_cv_test_$1 = yes; then | ||
132 | $1=1; | ||
133 | else | ||
134 | $1=0; | ||
135 | fi | ||
136 | AC_SUBST([$1]) | ||
137 | ]) | ||
138 | |||
139 | # gl_INTTYPES_MODULE_INDICATOR([modulename]) | ||
140 | # sets the shell variable that indicates the presence of the given module | ||
141 | # to a C preprocessor expression that will evaluate to 1. | ||
142 | # This macro invocation must not occur in macros that are AC_REQUIREd. | ||
143 | AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR], | ||
144 | [ | ||
145 | dnl Ensure to expand the default settings once only. | ||
146 | gl_INTTYPES_H_REQUIRE_DEFAULTS | ||
147 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | ||
148 | ]) | ||
149 | |||
150 | # Initializes the default values for AC_SUBSTed shell variables. | ||
151 | # This macro must not be AC_REQUIREd. It must only be invoked, and only | ||
152 | # outside of macros or in macros that are not AC_REQUIREd. | ||
153 | AC_DEFUN([gl_INTTYPES_H_REQUIRE_DEFAULTS], | ||
154 | [ | ||
155 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS], [ | ||
156 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXABS]) | ||
157 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXDIV]) | ||
158 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOIMAX]) | ||
159 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOUMAX]) | ||
160 | ]) | ||
161 | m4_require(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS]) | ||
162 | AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) | ||
163 | ]) | ||
164 | |||
165 | AC_DEFUN([gl_INTTYPES_H_DEFAULTS], | ||
166 | [ | ||
167 | dnl Assume proper GNU behavior unless another module says otherwise. | ||
168 | HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS]) | ||
169 | HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV]) | ||
170 | HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX]) | ||
171 | HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX]) | ||
172 | HAVE_IMAXDIV_T=1; AC_SUBST([HAVE_IMAXDIV_T]) | ||
173 | REPLACE_STRTOIMAX=0; AC_SUBST([REPLACE_STRTOIMAX]) | ||
174 | REPLACE_STRTOUMAX=0; AC_SUBST([REPLACE_STRTOUMAX]) | ||
175 | INT32_MAX_LT_INTMAX_MAX=1; AC_SUBST([INT32_MAX_LT_INTMAX_MAX]) | ||
176 | INT64_MAX_EQ_LONG_MAX='defined _LP64'; AC_SUBST([INT64_MAX_EQ_LONG_MAX]) | ||
177 | PRIPTR_PREFIX=__PRIPTR_PREFIX; AC_SUBST([PRIPTR_PREFIX]) | ||
178 | UINT32_MAX_LT_UINTMAX_MAX=1; AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX]) | ||
179 | UINT64_MAX_EQ_ULONG_MAX='defined _LP64'; AC_SUBST([UINT64_MAX_EQ_ULONG_MAX]) | ||
180 | ]) | ||