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| 1 # inttypes.m4 serial 12 |
| 2 dnl Copyright (C) 2006-2008 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], |
| 11 [ |
| 12 AC_REQUIRE([gl_STDINT_H]) |
| 13 AC_REQUIRE([gt_INTTYPES_PRI]) |
| 14 AC_CHECK_DECLS_ONCE([imaxabs]) |
| 15 AC_CHECK_DECLS_ONCE([imaxdiv]) |
| 16 AC_CHECK_DECLS_ONCE([strtoimax]) |
| 17 AC_CHECK_DECLS_ONCE([strtoumax]) |
| 18 |
| 19 dnl Now see if we need a substitute <inttypes.h>. |
| 20 dnl A complete <inttypes.h> requires |
| 21 dnl - a complete <stdint.h>, |
| 22 dnl - the existence of an <inttypes.h>, |
| 23 dnl - that imaxabs, imaxdiv, strtoimax, strtoumax are declared, |
| 24 dnl - some additional tests. |
| 25 AC_CACHE_CHECK([whether inttypes.h conforms to C99], |
| 26 [gl_cv_header_working_inttypes_h], |
| 27 [gl_cv_header_working_inttypes_h=no |
| 28 if test "$gl_cv_header_working_stdint_h" = yes \ |
| 29 && test $ac_cv_header_inttypes_h = yes \ |
| 30 && test "$ac_cv_have_decl_imaxabs" = yes \ |
| 31 && test "$ac_cv_have_decl_imaxdiv" = yes \ |
| 32 && test "$ac_cv_have_decl_strtoimax" = yes \ |
| 33 && test "$ac_cv_have_decl_strtoumax" = yes; then |
| 34 AC_COMPILE_IFELSE([ |
| 35 AC_LANG_PROGRAM([[ |
| 36 #include <stddef.h> |
| 37 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */ |
| 38 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */ |
| 39 #define __STDC_FORMAT_MACROS 1 /* to make it work also in C++ mode */ |
| 40 #define _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H /* work if build isn't clean */ |
| 41 #include <inttypes.h> |
| 42 |
| 43 /* No need to duplicate the tests of stdint.m4; they are subsumed by |
| 44 $gl_cv_header_working_stdint_h = yes. */ |
| 45 |
| 46 /* Tests for macros supposed to be defined in inttypes.h. */ |
| 47 |
| 48 const char *k = /* implicit string concatenation */ |
| 49 #ifdef INT8_MAX |
| 50 PRId8 PRIi8 |
| 51 #endif |
| 52 #ifdef UINT8_MAX |
| 53 PRIo8 PRIu8 PRIx8 PRIX8 |
| 54 #endif |
| 55 #ifdef INT16_MAX |
| 56 PRId16 PRIi16 |
| 57 #endif |
| 58 #ifdef UINT16_MAX |
| 59 PRIo16 PRIu16 PRIx16 PRIX16 |
| 60 #endif |
| 61 #ifdef INT32_MAX |
| 62 PRId32 PRIi32 |
| 63 #endif |
| 64 #ifdef UINT32_MAX |
| 65 PRIo32 PRIu32 PRIx32 PRIX32 |
| 66 #endif |
| 67 #ifdef INT64_MAX |
| 68 PRId64 PRIi64 |
| 69 #endif |
| 70 #ifdef UINT64_MAX |
| 71 PRIo64 PRIu64 PRIx64 PRIX64 |
| 72 #endif |
| 73 PRIdLEAST8 PRIiLEAST8 PRIoLEAST8 PRIuLEAST8 PRIxLEAST8 PRIXLEAST8 |
| 74 PRIdLEAST16 PRIiLEAST16 PRIoLEAST16 PRIuLEAST16 PRIxLEAST16 PRIXLEAST16 |
| 75 PRIdLEAST32 PRIiLEAST32 PRIoLEAST32 PRIuLEAST32 PRIxLEAST32 PRIXLEAST32 |
| 76 PRIdLEAST64 PRIiLEAST64 |
| 77 PRIoLEAST64 PRIuLEAST64 PRIxLEAST64 PRIXLEAST64 |
| 78 PRIdFAST8 PRIiFAST8 PRIoFAST8 PRIuFAST8 PRIxFAST8 PRIXFAST8 |
| 79 PRIdFAST16 PRIiFAST16 PRIoFAST16 PRIuFAST16 PRIxFAST16 PRIXFAST16 |
| 80 PRIdFAST32 PRIiFAST32 PRIoFAST32 PRIuFAST32 PRIxFAST32 PRIXFAST32 |
| 81 PRIdFAST64 PRIiFAST64 |
| 82 PRIoFAST64 PRIuFAST64 PRIxFAST64 PRIXFAST64 |
| 83 PRIdMAX PRIiMAX PRIoMAX PRIuMAX PRIxMAX PRIXMAX |
| 84 #ifdef INTPTR_MAX |
| 85 PRIdPTR PRIiPTR |
| 86 #endif |
| 87 #ifdef UINTPTR_MAX |
| 88 PRIoPTR PRIuPTR PRIxPTR PRIXPTR |
| 89 #endif |
| 90 ; |
| 91 const char *l = /* implicit string concatenation */ |
| 92 #ifdef INT8_MAX |
| 93 SCNd8 SCNi8 |
| 94 #endif |
| 95 #ifdef UINT8_MAX |
| 96 SCNo8 SCNu8 SCNx8 |
| 97 #endif |
| 98 #ifdef INT16_MAX |
| 99 SCNd16 SCNi16 |
| 100 #endif |
| 101 #ifdef UINT16_MAX |
| 102 SCNo16 SCNu16 SCNx16 |
| 103 #endif |
| 104 #ifdef INT32_MAX |
| 105 SCNd32 SCNi32 |
| 106 #endif |
| 107 #ifdef UINT32_MAX |
| 108 SCNo32 SCNu32 SCNx32 |
| 109 #endif |
| 110 #ifdef INT64_MAX |
| 111 SCNd64 SCNi64 |
| 112 #endif |
| 113 #ifdef UINT64_MAX |
| 114 SCNo64 SCNu64 SCNx64 |
| 115 #endif |
| 116 SCNdLEAST8 SCNiLEAST8 SCNoLEAST8 SCNuLEAST8 SCNxLEAST8 |
| 117 SCNdLEAST16 SCNiLEAST16 SCNoLEAST16 SCNuLEAST16 SCNxLEAST16 |
| 118 SCNdLEAST32 SCNiLEAST32 SCNoLEAST32 SCNuLEAST32 SCNxLEAST32 |
| 119 SCNdLEAST64 SCNiLEAST64 |
| 120 SCNoLEAST64 SCNuLEAST64 SCNxLEAST64 |
| 121 SCNdFAST8 SCNiFAST8 SCNoFAST8 SCNuFAST8 SCNxFAST8 |
| 122 SCNdFAST16 SCNiFAST16 SCNoFAST16 SCNuFAST16 SCNxFAST16 |
| 123 SCNdFAST32 SCNiFAST32 SCNoFAST32 SCNuFAST32 SCNxFAST32 |
| 124 SCNdFAST64 SCNiFAST64 |
| 125 SCNoFAST64 SCNuFAST64 SCNxFAST64 |
| 126 SCNdMAX SCNiMAX SCNoMAX SCNuMAX SCNxMAX |
| 127 #ifdef INTPTR_MAX |
| 128 SCNdPTR SCNiPTR |
| 129 #endif |
| 130 #ifdef UINTPTR_MAX |
| 131 SCNoPTR SCNuPTR SCNxPTR |
| 132 #endif |
| 133 ; |
| 134 ]])], |
| 135 [gl_cv_header_working_inttypes_h=yes]) |
| 136 fi]) |
| 137 |
| 138 dnl Override <inttypes.h> always, so that the portability warnings work. |
| 139 if false && test $gl_cv_header_working_inttypes_h = yes; then |
| 140 dnl Use the existing <inttypes.h>. |
| 141 INTTYPES_H='' |
| 142 else |
| 143 |
| 144 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) |
| 145 gl_CHECK_NEXT_HEADERS([inttypes.h]) |
| 146 |
| 147 dnl Ensure that <stdint.h> defines the limit macros, since gnulib's |
| 148 dnl <inttypes.h> relies on them. This macro is only needed when a |
| 149 dnl C++ compiler is in use; it has no effect for a C compiler. |
| 150 dnl Also be careful to define __STDC_LIMIT_MACROS only when gnulib's |
| 151 dnl <inttypes.h> is going to be created, and to avoid redefinition warnings |
| 152 dnl if the __STDC_LIMIT_MACROS is already defined through the CPPFLAGS. |
| 153 AC_DEFINE([GL_TRIGGER_STDC_LIMIT_MACROS], 1, |
| 154 [Define to make the limit macros in <stdint.h> visible.]) |
| 155 AH_VERBATIM([__STDC_LIMIT_MACROS_ZZZ], |
| 156 [/* Ensure that <stdint.h> defines the limit macros, since gnulib's |
| 157 <inttypes.h> relies on them. */ |
| 158 #if defined __cplusplus && !defined __STDC_LIMIT_MACROS && GL_TRIGGER_STDC_LIMIT
_MACROS |
| 159 # define __STDC_LIMIT_MACROS 1 |
| 160 #endif |
| 161 ]) |
| 162 |
| 163 PRIPTR_PREFIX= |
| 164 if test -n "$STDINT_H"; then |
| 165 dnl Using the gnulib <stdint.h>. It always defines intptr_t to 'long'. |
| 166 PRIPTR_PREFIX='"l"' |
| 167 else |
| 168 dnl Using the system's <stdint.h>. |
| 169 for glpfx in '' l ll I64; do |
| 170 case $glpfx in |
| 171 '') gltype1='int';; |
| 172 l) gltype1='long int';; |
| 173 ll) gltype1='long long int';; |
| 174 I64) gltype1='__int64';; |
| 175 esac |
| 176 AC_COMPILE_IFELSE( |
| 177 [AC_LANG_PROGRAM([[#include <stdint.h> |
| 178 extern intptr_t foo; |
| 179 extern $gltype1 foo;]])], |
| 180 [PRIPTR_PREFIX='"'$glpfx'"']) |
| 181 test -n "$PRIPTR_PREFIX" && break |
| 182 done |
| 183 fi |
| 184 AC_SUBST([PRIPTR_PREFIX]) |
| 185 |
| 186 if test "$ac_cv_have_decl_imaxabs" = yes; then |
| 187 HAVE_DECL_IMAXABS=1 |
| 188 else |
| 189 HAVE_DECL_IMAXABS=0 |
| 190 fi |
| 191 |
| 192 if test "$ac_cv_have_decl_imaxdiv" = yes; then |
| 193 HAVE_DECL_IMAXDIV=1 |
| 194 else |
| 195 HAVE_DECL_IMAXDIV=0 |
| 196 fi |
| 197 |
| 198 if test "$ac_cv_have_decl_strtoimax" = yes; then |
| 199 HAVE_DECL_STRTOIMAX=1 |
| 200 else |
| 201 HAVE_DECL_STRTOIMAX=0 |
| 202 fi |
| 203 |
| 204 if test "$ac_cv_have_decl_strtoumax" = yes; then |
| 205 HAVE_DECL_STRTOUMAX=1 |
| 206 else |
| 207 HAVE_DECL_STRTOUMAX=0 |
| 208 fi |
| 209 |
| 210 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( |
| 211 [INT32_MAX_LT_INTMAX_MAX], |
| 212 [defined INT32_MAX && defined INTMAX_MAX], |
| 213 [INT32_MAX < INTMAX_MAX], |
| 214 [sizeof (int) < sizeof (long long int)]) |
| 215 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( |
| 216 [INT64_MAX_EQ_LONG_MAX], |
| 217 [defined INT64_MAX], |
| 218 [INT64_MAX == LONG_MAX], |
| 219 [sizeof (long long int) == sizeof (long int)]) |
| 220 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( |
| 221 [UINT32_MAX_LT_UINTMAX_MAX], |
| 222 [defined UINT32_MAX && defined UINTMAX_MAX], |
| 223 [UINT32_MAX < UINTMAX_MAX], |
| 224 [sizeof (unsigned int) < sizeof (unsigned long long int)]) |
| 225 gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION( |
| 226 [UINT64_MAX_EQ_ULONG_MAX], |
| 227 [defined UINT64_MAX], |
| 228 [UINT64_MAX == ULONG_MAX], |
| 229 [sizeof (unsigned long long int) == sizeof (unsigned long int)]) |
| 230 |
| 231 INTTYPES_H='inttypes.h' |
| 232 fi |
| 233 AC_SUBST(INTTYPES_H) |
| 234 ]) |
| 235 |
| 236 # Define the symbol $1 to be 1 if the condition is true, 0 otherwise. |
| 237 # If $2 is true, the condition is $3; otherwise if long long int is supported |
| 238 # approximate the condition with $4; otherwise, assume the condition is false. |
| 239 # The condition should work on all C99 platforms; the approximations should be |
| 240 # good enough to work on all practical pre-C99 platforms. |
| 241 # $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants. |
| 242 AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION], |
| 243 [ |
| 244 AC_CACHE_CHECK([whether $3], |
| 245 [gl_cv_test_$1], |
| 246 [AC_COMPILE_IFELSE( |
| 247 [AC_LANG_PROGRAM( |
| 248 [[/* Work also in C++ mode. */ |
| 249 #define __STDC_LIMIT_MACROS 1 |
| 250 |
| 251 /* Work if build is not clean. */ |
| 252 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H |
| 253 |
| 254 #include <limits.h> |
| 255 #if HAVE_STDINT_H |
| 256 #include <stdint.h> |
| 257 #endif |
| 258 |
| 259 #if $2 |
| 260 #define CONDITION ($3) |
| 261 #elif HAVE_LONG_LONG_INT |
| 262 #define CONDITION ($4) |
| 263 #else |
| 264 #define CONDITION 0 |
| 265 #endif |
| 266 int test[CONDITION ? 1 : -1];]])], |
| 267 [gl_cv_test_$1=yes], |
| 268 [gl_cv_test_$1=no])]) |
| 269 if test $gl_cv_test_$1 = yes; then |
| 270 $1=1; |
| 271 else |
| 272 $1=0; |
| 273 fi |
| 274 AC_SUBST([$1]) |
| 275 ]) |
| 276 |
| 277 AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR], |
| 278 [ |
| 279 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| 280 AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) |
| 281 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRS
TUVWXYZ___])=1 |
| 282 ]) |
| 283 |
| 284 AC_DEFUN([gl_INTTYPES_H_DEFAULTS], |
| 285 [ |
| 286 GNULIB_IMAXABS=0; AC_SUBST([GNULIB_IMAXABS]) |
| 287 GNULIB_IMAXDIV=0; AC_SUBST([GNULIB_IMAXDIV]) |
| 288 GNULIB_STRTOIMAX=0; AC_SUBST([GNULIB_STRTOIMAX]) |
| 289 GNULIB_STRTOUMAX=0; AC_SUBST([GNULIB_STRTOUMAX]) |
| 290 dnl Assume proper GNU behavior unless another module says otherwise. |
| 291 HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS]) |
| 292 HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV]) |
| 293 HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX]) |
| 294 HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX]) |
| 295 ]) |
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