gnulib/import/m4/stdint.m4

   1 # stdint.m4 serial 53
   2 dnl Copyright (C) 2001-2019 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 Paul Eggert and Bruno Haible.
   8 dnl Test whether <stdint.h> is supported or must be substituted.
   9
  10 AC_PREREQ([2.61])
  11
  12 AC_DEFUN_ONCE([gl_STDINT_H],
  13 [
  14   AC_PREREQ([2.59])dnl
  15   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  16
  17   AC_REQUIRE([gl_LIMITS_H])
  18   AC_REQUIRE([gt_TYPE_WINT_T])
  19
  20   dnl Check for long long int and unsigned long long int.
  21   AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
  22   if test $ac_cv_type_long_long_int = yes; then
  23     HAVE_LONG_LONG_INT=1
  24   else
  25     HAVE_LONG_LONG_INT=0
  26   fi
  27   AC_SUBST([HAVE_LONG_LONG_INT])
  28   AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
  29   if test $ac_cv_type_unsigned_long_long_int = yes; then
  30     HAVE_UNSIGNED_LONG_LONG_INT=1
  31   else
  32     HAVE_UNSIGNED_LONG_LONG_INT=0
  33   fi
  34   AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
  35
  36   dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
  37   AC_CHECK_HEADERS_ONCE([wchar.h])
  38   if test $ac_cv_header_wchar_h = yes; then
  39     HAVE_WCHAR_H=1
  40   else
  41     HAVE_WCHAR_H=0
  42   fi
  43   AC_SUBST([HAVE_WCHAR_H])
  44
  45   dnl Check for <inttypes.h>.
  46   dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
  47   if test $ac_cv_header_inttypes_h = yes; then
  48     HAVE_INTTYPES_H=1
  49   else
  50     HAVE_INTTYPES_H=0
  51   fi
  52   AC_SUBST([HAVE_INTTYPES_H])
  53
  54   dnl Check for <sys/types.h>.
  55   dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
  56   if test $ac_cv_header_sys_types_h = yes; then
  57     HAVE_SYS_TYPES_H=1
  58   else
  59     HAVE_SYS_TYPES_H=0
  60   fi
  61   AC_SUBST([HAVE_SYS_TYPES_H])
  62
  63   gl_CHECK_NEXT_HEADERS([stdint.h])
  64   if test $ac_cv_header_stdint_h = yes; then
  65     HAVE_STDINT_H=1
  66   else
  67     HAVE_STDINT_H=0
  68   fi
  69   AC_SUBST([HAVE_STDINT_H])
  70
  71   dnl Now see whether we need a substitute <stdint.h>.
  72   if test $ac_cv_header_stdint_h = yes; then
  73     AC_CACHE_CHECK([whether stdint.h conforms to C99],
  74       [gl_cv_header_working_stdint_h],
  75       [gl_cv_header_working_stdint_h=no
  76        AC_COMPILE_IFELSE([
  77          AC_LANG_PROGRAM([[
  78 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
  79 #define __STDC_CONSTANT_MACROS 1
  80 #define __STDC_LIMIT_MACROS 1
  81 #include <stdint.h>
  82 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>.  */
  83 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
  84 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
  85 #endif
  86 ]
  87 gl_STDINT_INCLUDES
  88 [
  89 #ifdef INT8_MAX
  90 int8_t a1 = INT8_MAX;
  91 int8_t a1min = INT8_MIN;
  92 #endif
  93 #ifdef INT16_MAX
  94 int16_t a2 = INT16_MAX;
  95 int16_t a2min = INT16_MIN;
  96 #endif
  97 #ifdef INT32_MAX
  98 int32_t a3 = INT32_MAX;
  99 int32_t a3min = INT32_MIN;
 100 #endif
 101 #ifdef INT64_MAX
 102 int64_t a4 = INT64_MAX;
 103 int64_t a4min = INT64_MIN;
 104 #endif
 105 #ifdef UINT8_MAX
 106 uint8_t b1 = UINT8_MAX;
 107 #else
 108 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
 109 #endif
 110 #ifdef UINT16_MAX
 111 uint16_t b2 = UINT16_MAX;
 112 #endif
 113 #ifdef UINT32_MAX
 114 uint32_t b3 = UINT32_MAX;
 115 #endif
 116 #ifdef UINT64_MAX
 117 uint64_t b4 = UINT64_MAX;
 118 #endif
 119 int_least8_t c1 = INT8_C (0x7f);
 120 int_least8_t c1max = INT_LEAST8_MAX;
 121 int_least8_t c1min = INT_LEAST8_MIN;
 122 int_least16_t c2 = INT16_C (0x7fff);
 123 int_least16_t c2max = INT_LEAST16_MAX;
 124 int_least16_t c2min = INT_LEAST16_MIN;
 125 int_least32_t c3 = INT32_C (0x7fffffff);
 126 int_least32_t c3max = INT_LEAST32_MAX;
 127 int_least32_t c3min = INT_LEAST32_MIN;
 128 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
 129 int_least64_t c4max = INT_LEAST64_MAX;
 130 int_least64_t c4min = INT_LEAST64_MIN;
 131 uint_least8_t d1 = UINT8_C (0xff);
 132 uint_least8_t d1max = UINT_LEAST8_MAX;
 133 uint_least16_t d2 = UINT16_C (0xffff);
 134 uint_least16_t d2max = UINT_LEAST16_MAX;
 135 uint_least32_t d3 = UINT32_C (0xffffffff);
 136 uint_least32_t d3max = UINT_LEAST32_MAX;
 137 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
 138 uint_least64_t d4max = UINT_LEAST64_MAX;
 139 int_fast8_t e1 = INT_FAST8_MAX;
 140 int_fast8_t e1min = INT_FAST8_MIN;
 141 int_fast16_t e2 = INT_FAST16_MAX;
 142 int_fast16_t e2min = INT_FAST16_MIN;
 143 int_fast32_t e3 = INT_FAST32_MAX;
 144 int_fast32_t e3min = INT_FAST32_MIN;
 145 int_fast64_t e4 = INT_FAST64_MAX;
 146 int_fast64_t e4min = INT_FAST64_MIN;
 147 uint_fast8_t f1 = UINT_FAST8_MAX;
 148 uint_fast16_t f2 = UINT_FAST16_MAX;
 149 uint_fast32_t f3 = UINT_FAST32_MAX;
 150 uint_fast64_t f4 = UINT_FAST64_MAX;
 151 #ifdef INTPTR_MAX
 152 intptr_t g = INTPTR_MAX;
 153 intptr_t gmin = INTPTR_MIN;
 154 #endif
 155 #ifdef UINTPTR_MAX
 156 uintptr_t h = UINTPTR_MAX;
 157 #endif
 158 intmax_t i = INTMAX_MAX;
 159 uintmax_t j = UINTMAX_MAX;
 160
 161 /* Check that SIZE_MAX has the correct type, if possible.  */
 162 #if 201112 <= __STDC_VERSION__
 163 int k = _Generic (SIZE_MAX, size_t: 0);
 164 #elif (2 <= __GNUC__ || defined __IBM__TYPEOF__ \
 165        || (0x5110 <= __SUNPRO_C && !__STDC__))
 166 extern size_t k;
 167 extern __typeof__ (SIZE_MAX) k;
 168 #endif
 169
 170 #include <limits.h> /* for CHAR_BIT */
 171 #define TYPE_MINIMUM(t) \
 172   ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
 173 #define TYPE_MAXIMUM(t) \
 174   ((t) ((t) 0 < (t) -1 \
 175         ? (t) -1 \
 176         : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
 177 struct s {
 178   int check_PTRDIFF:
 179       PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
 180       && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
 181       ? 1 : -1;
 182   /* Detect bug in FreeBSD 6.0 / ia64.  */
 183   int check_SIG_ATOMIC:
 184       SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
 185       && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
 186       ? 1 : -1;
 187   int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
 188   int check_WCHAR:
 189       WCHAR_MIN == TYPE_MINIMUM (wchar_t)
 190       && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
 191       ? 1 : -1;
 192   /* Detect bug in mingw.  */
 193   int check_WINT:
 194       WINT_MIN == TYPE_MINIMUM (wint_t)
 195       && WINT_MAX == TYPE_MAXIMUM (wint_t)
 196       ? 1 : -1;
 197
 198   /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others.  */
 199   int check_UINT8_C:
 200         (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
 201   int check_UINT16_C:
 202         (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
 203
 204   /* Detect bugs in OpenBSD 3.9 stdint.h.  */
 205 #ifdef UINT8_MAX
 206   int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
 207 #endif
 208 #ifdef UINT16_MAX
 209   int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
 210 #endif
 211 #ifdef UINT32_MAX
 212   int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
 213 #endif
 214 #ifdef UINT64_MAX
 215   int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
 216 #endif
 217   int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
 218   int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
 219   int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
 220   int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
 221   int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
 222   int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
 223   int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
 224   int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
 225   int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
 226   int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
 227   int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
 228 };
 229          ]])],
 230          [dnl Determine whether the various *_MIN, *_MAX macros are usable
 231           dnl in preprocessor expression. We could do it by compiling a test
 232           dnl program for each of these macros. It is faster to run a program
 233           dnl that inspects the macro expansion.
 234           dnl This detects a bug on HP-UX 11.23/ia64.
 235           AC_RUN_IFELSE([
 236             AC_LANG_PROGRAM([[
 237 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
 238 #define __STDC_CONSTANT_MACROS 1
 239 #define __STDC_LIMIT_MACROS 1
 240 #include <stdint.h>
 241 ]
 242 gl_STDINT_INCLUDES
 243 [
 244 #include <stdio.h>
 245 #include <string.h>
 246 #define MVAL(macro) MVAL1(macro)
 247 #define MVAL1(expression) #expression
 248 static const char *macro_values[] =
 249   {
 250 #ifdef INT8_MAX
 251     MVAL (INT8_MAX),
 252 #endif
 253 #ifdef INT16_MAX
 254     MVAL (INT16_MAX),
 255 #endif
 256 #ifdef INT32_MAX
 257     MVAL (INT32_MAX),
 258 #endif
 259 #ifdef INT64_MAX
 260     MVAL (INT64_MAX),
 261 #endif
 262 #ifdef UINT8_MAX
 263     MVAL (UINT8_MAX),
 264 #endif
 265 #ifdef UINT16_MAX
 266     MVAL (UINT16_MAX),
 267 #endif
 268 #ifdef UINT32_MAX
 269     MVAL (UINT32_MAX),
 270 #endif
 271 #ifdef UINT64_MAX
 272     MVAL (UINT64_MAX),
 273 #endif
 274     NULL
 275   };
 276 ]], [[
 277   const char **mv;
 278   for (mv = macro_values; *mv != NULL; mv++)
 279     {
 280       const char *value = *mv;
 281       /* Test whether it looks like a cast expression.  */
 282       if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
 283           || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
 284           || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
 285           || strncmp (value, "((int)"/*)*/, 6) == 0
 286           || strncmp (value, "((signed short)"/*)*/, 15) == 0
 287           || strncmp (value, "((signed char)"/*)*/, 14) == 0)
 288         return mv - macro_values + 1;
 289     }
 290   return 0;
 291 ]])],
 292               [gl_cv_header_working_stdint_h=yes],
 293               [],
 294               [case "$host_os" in
 295                          # Guess yes on native Windows.
 296                  mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
 297                          # In general, assume it works.
 298                  *)      gl_cv_header_working_stdint_h="guessing yes" ;;
 299                esac
 300               ])
 301          ])
 302       ])
 303   fi
 304
 305   HAVE_C99_STDINT_H=0
 306   HAVE_SYS_BITYPES_H=0
 307   HAVE_SYS_INTTYPES_H=0
 308   STDINT_H=stdint.h
 309   case "$gl_cv_header_working_stdint_h" in
 310     *yes)
 311       HAVE_C99_STDINT_H=1
 312       dnl Now see whether the system <stdint.h> works without
 313       dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
 314       AC_CACHE_CHECK([whether stdint.h predates C++11],
 315         [gl_cv_header_stdint_predates_cxx11_h],
 316         [gl_cv_header_stdint_predates_cxx11_h=yes
 317          AC_COMPILE_IFELSE([
 318            AC_LANG_PROGRAM([[
 319 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
 320 #include <stdint.h>
 321 ]
 322 gl_STDINT_INCLUDES
 323 [
 324 intmax_t im = INTMAX_MAX;
 325 int32_t i32 = INT32_C (0x7fffffff);
 326            ]])],
 327            [gl_cv_header_stdint_predates_cxx11_h=no])])
 328
 329       if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
 330         AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
 331                   [Define to 1 if the system <stdint.h> predates C++11.])
 332         AC_DEFINE([__STDC_LIMIT_MACROS], [1],
 333                   [Define to 1 if the system <stdint.h> predates C++11.])
 334       fi
 335       AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
 336         [gl_cv_header_stdint_width],
 337         [gl_cv_header_stdint_width=no
 338          AC_COMPILE_IFELSE(
 339            [AC_LANG_PROGRAM([[
 340               /* Work if build is not clean.  */
 341               #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
 342               #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
 343                #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
 344               #endif
 345               #include <stdint.h>
 346               ]gl_STDINT_INCLUDES[
 347               int iw = UINTMAX_WIDTH;
 348               ]])],
 349            [gl_cv_header_stdint_width=yes])])
 350       if test "$gl_cv_header_stdint_width" = yes; then
 351         STDINT_H=
 352       fi
 353       ;;
 354     *)
 355       dnl Check for <sys/inttypes.h>, and for
 356       dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
 357       AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
 358       if test $ac_cv_header_sys_inttypes_h = yes; then
 359         HAVE_SYS_INTTYPES_H=1
 360       fi
 361       if test $ac_cv_header_sys_bitypes_h = yes; then
 362         HAVE_SYS_BITYPES_H=1
 363       fi
 364       gl_STDINT_TYPE_PROPERTIES
 365       ;;
 366   esac
 367
 368   dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
 369   gl_REPLACE_LIMITS_H
 370
 371   AC_SUBST([HAVE_C99_STDINT_H])
 372   AC_SUBST([HAVE_SYS_BITYPES_H])
 373   AC_SUBST([HAVE_SYS_INTTYPES_H])
 374   AC_SUBST([STDINT_H])
 375   AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
 376 ])
 377
 378 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
 379 dnl Determine the size of each of the given types in bits.
 380 AC_DEFUN([gl_STDINT_BITSIZEOF],
 381 [
 382   dnl Use a shell loop, to avoid bloating configure, and
 383   dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
 384   dnl   config.h.in,
 385   dnl - extra AC_SUBST calls, so that the right substitutions are made.
 386   m4_foreach_w([gltype], [$1],
 387     [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
 388        [Define to the number of bits in type ']gltype['.])])
 389   for gltype in $1 ; do
 390     AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
 391       [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
 392          [$2
 393 #include <limits.h>], [result=unknown])
 394        eval gl_cv_bitsizeof_${gltype}=\$result
 395       ])
 396     eval result=\$gl_cv_bitsizeof_${gltype}
 397     if test $result = unknown; then
 398       dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
 399       dnl do a syntax check even on unused #if conditions and give an error
 400       dnl on valid C code like this:
 401       dnl   #if 0
 402       dnl   # if  > 32
 403       dnl   # endif
 404       dnl   #endif
 405       result=0
 406     fi
 407     GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
 408     AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
 409     eval BITSIZEOF_${GLTYPE}=\$result
 410   done
 411   m4_foreach_w([gltype], [$1],
 412     [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
 413 ])
 414
 415 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
 416 dnl Determine the signedness of each of the given types.
 417 dnl Define HAVE_SIGNED_TYPE if type is signed.
 418 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
 419 [
 420   dnl Use a shell loop, to avoid bloating configure, and
 421   dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
 422   dnl   config.h.in,
 423   dnl - extra AC_SUBST calls, so that the right substitutions are made.
 424   m4_foreach_w([gltype], [$1],
 425     [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
 426        [Define to 1 if ']gltype[' is a signed integer type.])])
 427   for gltype in $1 ; do
 428     AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
 429       [AC_COMPILE_IFELSE(
 430          [AC_LANG_PROGRAM([$2[
 431             int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
 432          result=yes, result=no)
 433        eval gl_cv_type_${gltype}_signed=\$result
 434       ])
 435     eval result=\$gl_cv_type_${gltype}_signed
 436     GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
 437     if test "$result" = yes; then
 438       AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
 439       eval HAVE_SIGNED_${GLTYPE}=1
 440     else
 441       eval HAVE_SIGNED_${GLTYPE}=0
 442     fi
 443   done
 444   m4_foreach_w([gltype], [$1],
 445     [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
 446 ])
 447
 448 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
 449 dnl Determine the suffix to use for integer constants of the given types.
 450 dnl Define t_SUFFIX for each such type.
 451 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
 452 [
 453   dnl Use a shell loop, to avoid bloating configure, and
 454   dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
 455   dnl   config.h.in,
 456   dnl - extra AC_SUBST calls, so that the right substitutions are made.
 457   m4_foreach_w([gltype], [$1],
 458     [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
 459        [Define to l, ll, u, ul, ull, etc., as suitable for
 460         constants of type ']gltype['.])])
 461   for gltype in $1 ; do
 462     AC_CACHE_CHECK([for $gltype integer literal suffix],
 463       [gl_cv_type_${gltype}_suffix],
 464       [eval gl_cv_type_${gltype}_suffix=no
 465        eval result=\$gl_cv_type_${gltype}_signed
 466        if test "$result" = yes; then
 467          glsufu=
 468        else
 469          glsufu=u
 470        fi
 471        for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
 472          case $glsuf in
 473            '')  gltype1='int';;
 474            l)   gltype1='long int';;
 475            ll)  gltype1='long long int';;
 476            i64) gltype1='__int64';;
 477            u)   gltype1='unsigned int';;
 478            ul)  gltype1='unsigned long int';;
 479            ull) gltype1='unsigned long long int';;
 480            ui64)gltype1='unsigned __int64';;
 481          esac
 482          AC_COMPILE_IFELSE(
 483            [AC_LANG_PROGRAM([$2[
 484               extern $gltype foo;
 485               extern $gltype1 foo;]])],
 486            [eval gl_cv_type_${gltype}_suffix=\$glsuf])
 487          eval result=\$gl_cv_type_${gltype}_suffix
 488          test "$result" != no && break
 489        done])
 490     GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
 491     eval result=\$gl_cv_type_${gltype}_suffix
 492     test "$result" = no && result=
 493     eval ${GLTYPE}_SUFFIX=\$result
 494     AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
 495   done
 496   m4_foreach_w([gltype], [$1],
 497     [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
 498 ])
 499
 500 dnl gl_STDINT_INCLUDES
 501 AC_DEFUN([gl_STDINT_INCLUDES],
 502 [[
 503   /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
 504      included before <wchar.h>.  */
 505   #include <stddef.h>
 506   #include <signal.h>
 507   #if HAVE_WCHAR_H
 508   # include <stdio.h>
 509   # include <time.h>
 510   # include <wchar.h>
 511   #endif
 512 ]])
 513
 514 dnl gl_STDINT_TYPE_PROPERTIES
 515 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
 516 dnl of interest to stdint.in.h.
 517 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
 518 [
 519   AC_REQUIRE([gl_MULTIARCH])
 520   if test $APPLE_UNIVERSAL_BUILD = 0; then
 521     gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
 522       [gl_STDINT_INCLUDES])
 523   fi
 524   gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
 525     [gl_STDINT_INCLUDES])
 526   gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
 527     [gl_STDINT_INCLUDES])
 528   gl_cv_type_ptrdiff_t_signed=yes
 529   gl_cv_type_size_t_signed=no
 530   if test $APPLE_UNIVERSAL_BUILD = 0; then
 531     gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
 532       [gl_STDINT_INCLUDES])
 533   fi
 534   gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
 535     [gl_STDINT_INCLUDES])
 536
 537   dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99
 538   dnl requirement that wint_t is "unchanged by default argument promotions".
 539   dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
 540   dnl Set the variable BITSIZEOF_WINT_T accordingly.
 541   if test $GNULIB_OVERRIDES_WINT_T = 1; then
 542     BITSIZEOF_WINT_T=32
 543   fi
 544 ])