| 1 | # stdint.m4 serial 20
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| 2 | dnl Copyright (C) 2001-2002, 2004-2006 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | dnl From Paul Eggert and Bruno Haible.
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| 8 | dnl Test whether <stdint.h> is supported or must be substituted.
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| 9 |
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| 10 | AC_DEFUN([gl_STDINT_H],
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| 11 | [
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| 12 | AC_PREREQ(2.59)dnl
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| 13 |
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| 14 | dnl Check for long long int and unsigned long long int.
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| 15 | AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
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| 16 | if test $ac_cv_type_long_long_int = yes; then
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| 17 | HAVE_LONG_LONG_INT=1
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| 18 | else
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| 19 | HAVE_LONG_LONG_INT=0
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| 20 | fi
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| 21 | AC_SUBST([HAVE_LONG_LONG_INT])
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| 22 | AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
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| 23 | if test $ac_cv_type_unsigned_long_long_int = yes; then
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| 24 | HAVE_UNSIGNED_LONG_LONG_INT=1
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| 25 | else
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| 26 | HAVE_UNSIGNED_LONG_LONG_INT=0
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| 27 | fi
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| 28 | AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
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| 29 |
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| 30 | dnl Check for <wchar.h>.
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| 31 | AC_CHECK_HEADERS_ONCE([wchar.h])
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| 32 | if test $ac_cv_header_wchar_h = yes; then
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| 33 | HAVE_WCHAR_H=1
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| 34 | else
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| 35 | HAVE_WCHAR_H=0
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| 36 | fi
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| 37 | AC_SUBST([HAVE_WCHAR_H])
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| 38 |
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| 39 | dnl Check for <inttypes.h>.
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| 40 | dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
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| 41 | if test $ac_cv_header_inttypes_h = yes; then
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| 42 | HAVE_INTTYPES_H=1
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| 43 | else
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| 44 | HAVE_INTTYPES_H=0
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| 45 | fi
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| 46 | AC_SUBST([HAVE_INTTYPES_H])
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| 47 |
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| 48 | dnl Check for <sys/types.h>.
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| 49 | dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
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| 50 | if test $ac_cv_header_sys_types_h = yes; then
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| 51 | HAVE_SYS_TYPES_H=1
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| 52 | else
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| 53 | HAVE_SYS_TYPES_H=0
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| 54 | fi
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| 55 | AC_SUBST([HAVE_SYS_TYPES_H])
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| 56 |
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| 57 | dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h.
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| 58 | if test $ac_cv_header_stdint_h = yes; then
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| 59 | gl_ABSOLUTE_HEADER([stdint.h])
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| 60 | ABSOLUTE_STDINT_H=\"$gl_cv_absolute_stdint_h\"
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| 61 | HAVE_STDINT_H=1
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| 62 | else
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| 63 | ABSOLUTE_STDINT_H=\"no/such/file/stdint.h\"
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| 64 | HAVE_STDINT_H=0
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| 65 | fi
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| 66 | AC_SUBST([ABSOLUTE_STDINT_H])
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| 67 | AC_SUBST([HAVE_STDINT_H])
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| 68 |
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| 69 | dnl Now see whether we need a substitute <stdint.h>. Use
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| 70 | dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during
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| 71 | dnl a "config.status --recheck" if a stdint.h has been
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| 72 | dnl created in the build directory.
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| 73 | if test $ac_cv_header_stdint_h = yes; then
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| 74 | AC_CACHE_CHECK([whether stdint.h conforms to C99],
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| 75 | [gl_cv_header_working_stdint_h],
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| 76 | [gl_cv_header_working_stdint_h=no
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| 77 | AC_COMPILE_IFELSE([
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| 78 | AC_LANG_PROGRAM([[
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| 79 | #include <stddef.h>
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| 80 | #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
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| 81 | #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
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| 82 | #include ABSOLUTE_STDINT_H
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| 83 | #ifdef INT8_MAX
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| 84 | int8_t a1 = INT8_MAX;
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| 85 | int8_t a1min = INT8_MIN;
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| 86 | #endif
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| 87 | #ifdef INT16_MAX
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| 88 | int16_t a2 = INT16_MAX;
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| 89 | int16_t a2min = INT16_MIN;
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| 90 | #endif
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| 91 | #ifdef INT32_MAX
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| 92 | int32_t a3 = INT32_MAX;
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| 93 | int32_t a3min = INT32_MIN;
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| 94 | #endif
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| 95 | #ifdef INT64_MAX
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| 96 | int64_t a4 = INT64_MAX;
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| 97 | int64_t a4min = INT64_MIN;
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| 98 | #endif
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| 99 | #ifdef UINT8_MAX
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| 100 | uint8_t b1 = UINT8_MAX;
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| 101 | #else
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| 102 | typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
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| 103 | #endif
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| 104 | #ifdef UINT16_MAX
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| 105 | uint16_t b2 = UINT16_MAX;
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| 106 | #endif
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| 107 | #ifdef UINT32_MAX
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| 108 | uint32_t b3 = UINT32_MAX;
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| 109 | #endif
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| 110 | #ifdef UINT64_MAX
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| 111 | uint64_t b4 = UINT64_MAX;
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| 112 | #endif
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| 113 | int_least8_t c1 = INT8_C (0x7f);
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| 114 | int_least8_t c1max = INT_LEAST8_MAX;
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| 115 | int_least8_t c1min = INT_LEAST8_MIN;
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| 116 | int_least16_t c2 = INT16_C (0x7fff);
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| 117 | int_least16_t c2max = INT_LEAST16_MAX;
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| 118 | int_least16_t c2min = INT_LEAST16_MIN;
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| 119 | int_least32_t c3 = INT32_C (0x7fffffff);
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| 120 | int_least32_t c3max = INT_LEAST32_MAX;
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| 121 | int_least32_t c3min = INT_LEAST32_MIN;
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| 122 | int_least64_t c4 = INT64_C (0x7fffffffffffffff);
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| 123 | int_least64_t c4max = INT_LEAST64_MAX;
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| 124 | int_least64_t c4min = INT_LEAST64_MIN;
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| 125 | uint_least8_t d1 = UINT8_C (0xff);
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| 126 | uint_least8_t d1max = UINT_LEAST8_MAX;
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| 127 | uint_least16_t d2 = UINT16_C (0xffff);
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| 128 | uint_least16_t d2max = UINT_LEAST16_MAX;
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| 129 | uint_least32_t d3 = UINT32_C (0xffffffff);
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| 130 | uint_least32_t d3max = UINT_LEAST32_MAX;
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| 131 | uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
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| 132 | uint_least64_t d4max = UINT_LEAST64_MAX;
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| 133 | int_fast8_t e1 = INT_FAST8_MAX;
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| 134 | int_fast8_t e1min = INT_FAST8_MIN;
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| 135 | int_fast16_t e2 = INT_FAST16_MAX;
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| 136 | int_fast16_t e2min = INT_FAST16_MIN;
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| 137 | int_fast32_t e3 = INT_FAST32_MAX;
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| 138 | int_fast32_t e3min = INT_FAST32_MIN;
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| 139 | int_fast64_t e4 = INT_FAST64_MAX;
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| 140 | int_fast64_t e4min = INT_FAST64_MIN;
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| 141 | uint_fast8_t f1 = UINT_FAST8_MAX;
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| 142 | uint_fast16_t f2 = UINT_FAST16_MAX;
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| 143 | uint_fast32_t f3 = UINT_FAST32_MAX;
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| 144 | uint_fast64_t f4 = UINT_FAST64_MAX;
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| 145 | #ifdef INTPTR_MAX
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| 146 | intptr_t g = INTPTR_MAX;
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| 147 | intptr_t gmin = INTPTR_MIN;
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| 148 | #endif
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| 149 | #ifdef UINTPTR_MAX
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| 150 | uintptr_t h = UINTPTR_MAX;
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| 151 | #endif
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| 152 | intmax_t i = INTMAX_MAX;
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| 153 | uintmax_t j = UINTMAX_MAX;
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| 154 | struct s {
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| 155 | int check_PTRDIFF: PTRDIFF_MIN < 0 && 0 < PTRDIFF_MAX ? 1 : -1;
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| 156 | int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= 0 && 0 < SIG_ATOMIC_MAX ? 1 : -1;
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| 157 | int check_SIZE: 0 < SIZE_MAX ? 1 : -1;
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| 158 | int check_WCHAR: WCHAR_MIN <= 0 && 0 < WCHAR_MAX ? 1 : -1;
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| 159 | int check_WINT: WINT_MIN <= 0 && 0 < WINT_MAX ? 1 : -1;
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| 160 |
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| 161 | /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
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| 162 | int check_UINT8_C:
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| 163 | (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
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| 164 | int check_UINT16_C:
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| 165 | (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
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| 166 |
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| 167 | /* Detect bugs in OpenBSD 3.9 stdint.h. */
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| 168 | #ifdef UINT8_MAX
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| 169 | int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
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| 170 | #endif
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| 171 | #ifdef UINT16_MAX
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| 172 | int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
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| 173 | #endif
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| 174 | #ifdef UINT32_MAX
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| 175 | int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
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| 176 | #endif
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| 177 | #ifdef UINT64_MAX
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| 178 | int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
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| 179 | #endif
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| 180 | int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
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| 181 | int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
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| 182 | int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
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| 183 | int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
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| 184 | int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
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| 185 | int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
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| 186 | int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
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| 187 | int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
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| 188 | int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
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| 189 | int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
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| 190 | int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
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| 191 | };
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| 192 | ]])],
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| 193 | [gl_cv_header_working_stdint_h=yes])])
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| 194 | fi
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| 195 | if test "$gl_cv_header_working_stdint_h" != yes; then
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| 196 |
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| 197 | dnl Check for <sys/inttypes.h>, and for
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| 198 | dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
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| 199 | AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
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| 200 | if test $ac_cv_header_sys_inttypes_h = yes; then
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| 201 | HAVE_SYS_INTTYPES_H=1
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| 202 | else
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| 203 | HAVE_SYS_INTTYPES_H=0
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| 204 | fi
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| 205 | AC_SUBST([HAVE_SYS_INTTYPES_H])
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| 206 | if test $ac_cv_header_sys_bitypes_h = yes; then
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| 207 | HAVE_SYS_BITYPES_H=1
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| 208 | else
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| 209 | HAVE_SYS_BITYPES_H=0
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| 210 | fi
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| 211 | AC_SUBST([HAVE_SYS_BITYPES_H])
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| 212 |
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| 213 | gl_STDINT_TYPE_PROPERTIES
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| 214 | STDINT_H=stdint.h
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| 215 | fi
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| 216 | AC_SUBST(STDINT_H)
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| 217 | ])
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| 218 |
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| 219 | dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
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| 220 | dnl Determine the size of each of the given types in bits.
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| 221 | AC_DEFUN([gl_STDINT_BITSIZEOF],
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| 222 | [
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| 223 | dnl Use a shell loop, to avoid bloating configure, and
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| 224 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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| 225 | dnl config.h.in,
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| 226 | dnl - extra AC_SUBST calls, so that the right substitutions are made.
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| 227 | AC_FOREACH([gltype], [$1],
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| 228 | [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
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| 229 | [Define to the number of bits in type ']gltype['.])])
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| 230 | for gltype in $1 ; do
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| 231 | AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
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| 232 | [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
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| 233 | [$2
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| 234 | #include <limits.h>], [result=unknown])
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| 235 | eval gl_cv_bitsizeof_${gltype}=\$result
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| 236 | ])
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| 237 | eval result=\$gl_cv_bitsizeof_${gltype}
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| 238 | if test $result = unknown; then
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| 239 | dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
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| 240 | dnl do a syntax check even on unused #if conditions and give an error
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| 241 | dnl on valid C code like this:
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| 242 | dnl #if 0
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| 243 | dnl # if > 32
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| 244 | dnl # endif
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| 245 | dnl #endif
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| 246 | result=0
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| 247 | fi
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| 248 | GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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| 249 | AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
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| 250 | eval BITSIZEOF_${GLTYPE}=\$result
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| 251 | done
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| 252 | AC_FOREACH([gltype], [$1],
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| 253 | [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
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| 254 | ])
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| 255 |
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| 256 | dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
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| 257 | dnl Determine the signedness of each of the given types.
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| 258 | dnl Define HAVE_SIGNED_TYPE if type is signed.
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| 259 | AC_DEFUN([gl_CHECK_TYPES_SIGNED],
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| 260 | [
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| 261 | dnl Use a shell loop, to avoid bloating configure, and
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| 262 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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| 263 | dnl config.h.in,
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| 264 | dnl - extra AC_SUBST calls, so that the right substitutions are made.
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| 265 | AC_FOREACH([gltype], [$1],
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| 266 | [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
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| 267 | [Define to 1 if ']gltype[' is a signed integer type.])])
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| 268 | for gltype in $1 ; do
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| 269 | AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
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| 270 | [AC_COMPILE_IFELSE(
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| 271 | [AC_LANG_PROGRAM([$2[
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| 272 | int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
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| 273 | result=yes, result=no)
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| 274 | eval gl_cv_type_${gltype}_signed=\$result
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| 275 | ])
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| 276 | eval result=\$gl_cv_type_${gltype}_signed
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| 277 | GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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| 278 | if test "$result" = yes; then
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| 279 | AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
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| 280 | eval HAVE_SIGNED_${GLTYPE}=1
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| 281 | else
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| 282 | eval HAVE_SIGNED_${GLTYPE}=0
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| 283 | fi
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| 284 | done
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| 285 | AC_FOREACH([gltype], [$1],
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| 286 | [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
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| 287 | ])
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| 288 |
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| 289 | dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
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| 290 | dnl Determine the suffix to use for integer constants of the given types.
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| 291 | dnl Define t_SUFFIX for each such type.
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| 292 | AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
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| 293 | [
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| 294 | dnl Use a shell loop, to avoid bloating configure, and
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| 295 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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| 296 | dnl config.h.in,
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| 297 | dnl - extra AC_SUBST calls, so that the right substitutions are made.
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| 298 | AC_FOREACH([gltype], [$1],
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| 299 | [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
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| 300 | [Define to l, ll, u, ul, ull, etc., as suitable for
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| 301 | constants of type ']gltype['.])])
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| 302 | for gltype in $1 ; do
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| 303 | AC_CACHE_CHECK([for $gltype integer literal suffix],
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| 304 | [gl_cv_type_${gltype}_suffix],
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| 305 | [eval gl_cv_type_${gltype}_suffix=no
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| 306 | eval result=\$gl_cv_type_${gltype}_signed
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| 307 | if test "$result" = yes; then
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| 308 | glsufu=
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| 309 | else
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| 310 | glsufu=u
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| 311 | fi
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| 312 | for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
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| 313 | case $glsuf in
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| 314 | '') gltype1='int';;
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| 315 | l) gltype1='long int';;
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| 316 | ll) gltype1='long long int';;
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| 317 | i64) gltype1='__int64';;
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| 318 | u) gltype1='unsigned int';;
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| 319 | ul) gltype1='unsigned long int';;
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| 320 | ull) gltype1='unsigned long long int';;
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| 321 | ui64)gltype1='unsigned __int64';;
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| 322 | esac
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| 323 | AC_COMPILE_IFELSE(
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| 324 | [AC_LANG_PROGRAM([$2
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| 325 | extern $gltype foo;
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| 326 | extern $gltype1 foo;])],
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| 327 | [eval gl_cv_type_${gltype}_suffix=\$glsuf])
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| 328 | eval result=\$gl_cv_type_${gltype}_suffix
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| 329 | test "$result" != no && break
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| 330 | done])
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| 331 | GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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| 332 | eval result=\$gl_cv_type_${gltype}_suffix
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| 333 | test "$result" = no && result=
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| 334 | eval ${GLTYPE}_SUFFIX=\$result
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| 335 | AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
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| 336 | done
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| 337 | AC_FOREACH([gltype], [$1],
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| 338 | [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
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| 339 | ])
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| 340 |
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| 341 | dnl gl_STDINT_INCLUDES
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| 342 | AC_DEFUN([gl_STDINT_INCLUDES],
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| 343 | [[
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| 344 | #include <stddef.h>
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| 345 | #include <signal.h>
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| 346 | #if HAVE_WCHAR_H
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| 347 | /* BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
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| 348 | <wchar.h>. */
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| 349 | # include <stdio.h>
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| 350 | # include <time.h>
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| 351 | # include <wchar.h>
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| 352 | #endif
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| 353 | ]])
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| 354 |
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| 355 | dnl gl_STDINT_TYPE_PROPERTIES
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| 356 | dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
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| 357 | dnl of interest to stdint_.h.
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| 358 | AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
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| 359 | [
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| 360 | gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
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| 361 | [gl_STDINT_INCLUDES])
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| 362 | gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
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| 363 | [gl_STDINT_INCLUDES])
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| 364 | gl_cv_type_ptrdiff_t_signed=yes
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| 365 | gl_cv_type_size_t_signed=no
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| 366 | gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
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| 367 | [gl_STDINT_INCLUDES])
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| 368 | ])
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| 369 |
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| 370 | dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
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| 371 | dnl Remove this when we can assume autoconf >= 2.61.
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| 372 | m4_ifdef([AC_COMPUTE_INT], [], [
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| 373 | AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
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| 374 | ])
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