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3870d303 | 1 | # inttypes.m4 serial 24 |
a8a2bb29 PE |
2 | dnl Copyright (C) 2006-2011 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([gl_INTTYPES_H], | |
b6f5355a PE |
11 | [ |
12 | AC_REQUIRE([gl_INTTYPES_INCOMPLETE]) | |
13 | gl_INTTYPES_PRI_SCN | |
14 | ]) | |
15 | ||
3870d303 | 16 | AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE], |
a8a2bb29 PE |
17 | [ |
18 | AC_REQUIRE([gl_STDINT_H]) | |
03eb7af5 | 19 | AC_CHECK_HEADERS_ONCE([inttypes.h]) |
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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 | ||
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25 | AC_REQUIRE([gl_MULTIARCH]) |
26 | ||
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27 | dnl Ensure that <stdint.h> defines the limit macros, since gnulib's |
28 | dnl <inttypes.h> relies on them. This macro is only needed when a | |
29 | dnl C++ compiler is in use; it has no effect for a C compiler. | |
30 | dnl Also be careful to define __STDC_LIMIT_MACROS only when gnulib's | |
31 | dnl <inttypes.h> is going to be created, and to avoid redefinition warnings | |
32 | dnl if the __STDC_LIMIT_MACROS is already defined through the CPPFLAGS. | |
33 | AC_DEFINE([GL_TRIGGER_STDC_LIMIT_MACROS], [1], | |
34 | [Define to make the limit macros in <stdint.h> visible.]) | |
35 | AH_VERBATIM([__STDC_LIMIT_MACROS_ZZZ], | |
36 | [/* Ensure that <stdint.h> defines the limit macros, since gnulib's | |
37 | <inttypes.h> relies on them. */ | |
38 | #if defined __cplusplus && !defined __STDC_LIMIT_MACROS && GL_TRIGGER_STDC_LIMIT_MACROS | |
39 | # define __STDC_LIMIT_MACROS 1 | |
40 | #endif | |
41 | ]) | |
42 | ||
a8a2bb29 PE |
43 | dnl Check for declarations of anything we want to poison if the |
44 | dnl corresponding gnulib module is not in use. | |
45 | gl_WARN_ON_USE_PREPARE([[#include <inttypes.h> | |
46 | ]], [imaxabs imaxdiv strtoimax strtoumax]) | |
47 | ]) | |
48 | ||
b6f5355a PE |
49 | # Ensure that the PRI* and SCN* macros are defined appropriately. |
50 | AC_DEFUN([gl_INTTYPES_PRI_SCN], | |
51 | [ | |
52 | AC_REQUIRE([gt_INTTYPES_PRI]) | |
53 | ||
54 | PRIPTR_PREFIX= | |
55 | if test -n "$STDINT_H"; then | |
56 | dnl Using the gnulib <stdint.h>. It always defines intptr_t to 'long'. | |
57 | PRIPTR_PREFIX='"l"' | |
58 | else | |
59 | dnl Using the system's <stdint.h>. | |
60 | for glpfx in '' l ll I64; do | |
61 | case $glpfx in | |
62 | '') gltype1='int';; | |
63 | l) gltype1='long int';; | |
64 | ll) gltype1='long long int';; | |
65 | I64) gltype1='__int64';; | |
66 | esac | |
67 | AC_COMPILE_IFELSE( | |
68 | [AC_LANG_PROGRAM([[#include <stdint.h> | |
69 | extern intptr_t foo; | |
70 | extern $gltype1 foo;]])], | |
71 | [PRIPTR_PREFIX='"'$glpfx'"']) | |
72 | test -n "$PRIPTR_PREFIX" && break | |
73 | done | |
74 | fi | |
75 | AC_SUBST([PRIPTR_PREFIX]) | |
76 | ||
77 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | |
78 | [INT32_MAX_LT_INTMAX_MAX], | |
79 | [defined INT32_MAX && defined INTMAX_MAX], | |
80 | [INT32_MAX < INTMAX_MAX], | |
81 | [sizeof (int) < sizeof (long long int)]) | |
82 | if test $APPLE_UNIVERSAL_BUILD = 0; then | |
83 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | |
84 | [INT64_MAX_EQ_LONG_MAX], | |
85 | [defined INT64_MAX], | |
86 | [INT64_MAX == LONG_MAX], | |
87 | [sizeof (long long int) == sizeof (long int)]) | |
88 | else | |
89 | INT64_MAX_EQ_LONG_MAX=-1 | |
90 | fi | |
91 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | |
92 | [UINT32_MAX_LT_UINTMAX_MAX], | |
93 | [defined UINT32_MAX && defined UINTMAX_MAX], | |
94 | [UINT32_MAX < UINTMAX_MAX], | |
95 | [sizeof (unsigned int) < sizeof (unsigned long long int)]) | |
96 | if test $APPLE_UNIVERSAL_BUILD = 0; then | |
97 | gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( | |
98 | [UINT64_MAX_EQ_ULONG_MAX], | |
99 | [defined UINT64_MAX], | |
100 | [UINT64_MAX == ULONG_MAX], | |
101 | [sizeof (unsigned long long int) == sizeof (unsigned long int)]) | |
102 | else | |
103 | UINT64_MAX_EQ_ULONG_MAX=-1 | |
104 | fi | |
105 | ]) | |
106 | ||
107 | # Define the symbol $1 to be 1 if the condition is true, 0 otherwise. | |
108 | # If $2 is true, the condition is $3; otherwise if long long int is supported | |
109 | # approximate the condition with $4; otherwise, assume the condition is false. | |
110 | # The condition should work on all C99 platforms; the approximations should be | |
111 | # good enough to work on all practical pre-C99 platforms. | |
112 | # $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants. | |
113 | AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION], | |
114 | [ | |
115 | AC_CACHE_CHECK([whether $3], | |
116 | [gl_cv_test_$1], | |
117 | [AC_COMPILE_IFELSE( | |
118 | [AC_LANG_PROGRAM( | |
119 | [[/* Work also in C++ mode. */ | |
120 | #define __STDC_LIMIT_MACROS 1 | |
121 | ||
122 | /* Work if build is not clean. */ | |
123 | #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H | |
124 | ||
125 | #include <limits.h> | |
126 | #if HAVE_STDINT_H | |
127 | #include <stdint.h> | |
128 | #endif | |
129 | ||
130 | #if $2 | |
131 | #define CONDITION ($3) | |
132 | #elif HAVE_LONG_LONG_INT | |
133 | #define CONDITION ($4) | |
134 | #else | |
135 | #define CONDITION 0 | |
136 | #endif | |
137 | int test[CONDITION ? 1 : -1];]])], | |
138 | [gl_cv_test_$1=yes], | |
139 | [gl_cv_test_$1=no])]) | |
140 | if test $gl_cv_test_$1 = yes; then | |
141 | $1=1; | |
142 | else | |
143 | $1=0; | |
144 | fi | |
145 | AC_SUBST([$1]) | |
146 | ]) | |
147 | ||
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148 | AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR], |
149 | [ | |
150 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
151 | AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) | |
152 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | |
153 | ]) | |
154 | ||
155 | AC_DEFUN([gl_INTTYPES_H_DEFAULTS], | |
156 | [ | |
157 | GNULIB_IMAXABS=0; AC_SUBST([GNULIB_IMAXABS]) | |
158 | GNULIB_IMAXDIV=0; AC_SUBST([GNULIB_IMAXDIV]) | |
159 | GNULIB_STRTOIMAX=0; AC_SUBST([GNULIB_STRTOIMAX]) | |
160 | GNULIB_STRTOUMAX=0; AC_SUBST([GNULIB_STRTOUMAX]) | |
161 | dnl Assume proper GNU behavior unless another module says otherwise. | |
162 | HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS]) | |
163 | HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV]) | |
164 | HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX]) | |
165 | HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX]) | |
b6f5355a | 166 | INT32_MAX_LT_INTMAX_MAX=1; AC_SUBST([INT32_MAX_LT_INTMAX_MAX]) |
aaa93559 PE |
167 | INT64_MAX_EQ_LONG_MAX='defined _LP64'; AC_SUBST([INT64_MAX_EQ_LONG_MAX]) |
168 | PRI_MACROS_BROKEN=0; AC_SUBST([PRI_MACROS_BROKEN]) | |
169 | PRIPTR_PREFIX=__PRIPTR_PREFIX; AC_SUBST([PRIPTR_PREFIX]) | |
b6f5355a | 170 | UINT32_MAX_LT_UINTMAX_MAX=1; AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX]) |
aaa93559 | 171 | UINT64_MAX_EQ_ULONG_MAX='defined _LP64'; AC_SUBST([UINT64_MAX_EQ_ULONG_MAX]) |
a8a2bb29 | 172 | ]) |