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267
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1 # stdint.m4 serial 34
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2 dnl Copyright (C) 2001-2009 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 <inttypes.h>.
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31 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
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32 if test $ac_cv_header_inttypes_h = yes; then
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33 HAVE_INTTYPES_H=1
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34 else
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35 HAVE_INTTYPES_H=0
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36 fi
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37 AC_SUBST([HAVE_INTTYPES_H])
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38
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39 dnl Check for <sys/types.h>.
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40 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
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41 if test $ac_cv_header_sys_types_h = yes; then
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42 HAVE_SYS_TYPES_H=1
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43 else
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44 HAVE_SYS_TYPES_H=0
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45 fi
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46 AC_SUBST([HAVE_SYS_TYPES_H])
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47
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48 gl_CHECK_NEXT_HEADERS([stdint.h])
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49 if test $ac_cv_header_stdint_h = yes; then
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50 HAVE_STDINT_H=1
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51 else
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52 HAVE_STDINT_H=0
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53 fi
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54 AC_SUBST([HAVE_STDINT_H])
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55
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56 dnl Now see whether we need a substitute <stdint.h>.
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57 if test $ac_cv_header_stdint_h = yes; then
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58 AC_CACHE_CHECK([whether stdint.h conforms to C99],
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59 [gl_cv_header_working_stdint_h],
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60 [gl_cv_header_working_stdint_h=no
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61 AC_COMPILE_IFELSE([
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62 AC_LANG_PROGRAM([[
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63 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
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64 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
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65 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
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66 #include <stdint.h>
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67 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
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68 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
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69 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
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70 #endif
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71 ]
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72 gl_STDINT_INCLUDES
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73 [
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74 #ifdef INT8_MAX
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75 int8_t a1 = INT8_MAX;
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76 int8_t a1min = INT8_MIN;
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77 #endif
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78 #ifdef INT16_MAX
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79 int16_t a2 = INT16_MAX;
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80 int16_t a2min = INT16_MIN;
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81 #endif
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82 #ifdef INT32_MAX
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83 int32_t a3 = INT32_MAX;
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84 int32_t a3min = INT32_MIN;
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85 #endif
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86 #ifdef INT64_MAX
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87 int64_t a4 = INT64_MAX;
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88 int64_t a4min = INT64_MIN;
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89 #endif
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90 #ifdef UINT8_MAX
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91 uint8_t b1 = UINT8_MAX;
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92 #else
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93 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
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94 #endif
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95 #ifdef UINT16_MAX
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96 uint16_t b2 = UINT16_MAX;
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97 #endif
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98 #ifdef UINT32_MAX
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99 uint32_t b3 = UINT32_MAX;
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100 #endif
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101 #ifdef UINT64_MAX
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102 uint64_t b4 = UINT64_MAX;
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103 #endif
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104 int_least8_t c1 = INT8_C (0x7f);
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105 int_least8_t c1max = INT_LEAST8_MAX;
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106 int_least8_t c1min = INT_LEAST8_MIN;
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107 int_least16_t c2 = INT16_C (0x7fff);
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108 int_least16_t c2max = INT_LEAST16_MAX;
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109 int_least16_t c2min = INT_LEAST16_MIN;
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110 int_least32_t c3 = INT32_C (0x7fffffff);
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111 int_least32_t c3max = INT_LEAST32_MAX;
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112 int_least32_t c3min = INT_LEAST32_MIN;
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113 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
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114 int_least64_t c4max = INT_LEAST64_MAX;
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115 int_least64_t c4min = INT_LEAST64_MIN;
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116 uint_least8_t d1 = UINT8_C (0xff);
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117 uint_least8_t d1max = UINT_LEAST8_MAX;
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118 uint_least16_t d2 = UINT16_C (0xffff);
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119 uint_least16_t d2max = UINT_LEAST16_MAX;
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120 uint_least32_t d3 = UINT32_C (0xffffffff);
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121 uint_least32_t d3max = UINT_LEAST32_MAX;
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122 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
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123 uint_least64_t d4max = UINT_LEAST64_MAX;
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124 int_fast8_t e1 = INT_FAST8_MAX;
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125 int_fast8_t e1min = INT_FAST8_MIN;
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126 int_fast16_t e2 = INT_FAST16_MAX;
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127 int_fast16_t e2min = INT_FAST16_MIN;
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128 int_fast32_t e3 = INT_FAST32_MAX;
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129 int_fast32_t e3min = INT_FAST32_MIN;
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130 int_fast64_t e4 = INT_FAST64_MAX;
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131 int_fast64_t e4min = INT_FAST64_MIN;
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132 uint_fast8_t f1 = UINT_FAST8_MAX;
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133 uint_fast16_t f2 = UINT_FAST16_MAX;
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134 uint_fast32_t f3 = UINT_FAST32_MAX;
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135 uint_fast64_t f4 = UINT_FAST64_MAX;
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136 #ifdef INTPTR_MAX
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137 intptr_t g = INTPTR_MAX;
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138 intptr_t gmin = INTPTR_MIN;
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139 #endif
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140 #ifdef UINTPTR_MAX
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141 uintptr_t h = UINTPTR_MAX;
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142 #endif
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143 intmax_t i = INTMAX_MAX;
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144 uintmax_t j = UINTMAX_MAX;
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145
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146 #include <limits.h> /* for CHAR_BIT */
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147 #define TYPE_MINIMUM(t) \
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148 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
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149 #define TYPE_MAXIMUM(t) \
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150 ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
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151 struct s {
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152 int check_PTRDIFF:
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153 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
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154 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
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155 ? 1 : -1;
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156 /* Detect bug in FreeBSD 6.0 / ia64. */
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157 int check_SIG_ATOMIC:
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158 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
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159 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
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160 ? 1 : -1;
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161 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
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162 int check_WCHAR:
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163 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
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164 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
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165 ? 1 : -1;
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166 /* Detect bug in mingw. */
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167 int check_WINT:
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168 WINT_MIN == TYPE_MINIMUM (wint_t)
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169 && WINT_MAX == TYPE_MAXIMUM (wint_t)
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170 ? 1 : -1;
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171
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172 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
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173 int check_UINT8_C:
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174 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
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175 int check_UINT16_C:
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176 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
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177
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178 /* Detect bugs in OpenBSD 3.9 stdint.h. */
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179 #ifdef UINT8_MAX
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180 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
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181 #endif
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182 #ifdef UINT16_MAX
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183 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
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184 #endif
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185 #ifdef UINT32_MAX
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186 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
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187 #endif
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188 #ifdef UINT64_MAX
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189 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
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190 #endif
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191 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
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192 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
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193 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
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194 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
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195 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
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196 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
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197 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
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198 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
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199 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
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200 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
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201 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
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202 };
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203 ]])],
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204 [dnl Determine whether the various *_MIN, *_MAX macros are usable
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205 dnl in preprocessor expression. We could do it by compiling a test
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206 dnl program for each of these macros. It is faster to run a program
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207 dnl that inspects the macro expansion.
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208 dnl This detects a bug on HP-UX 11.23/ia64.
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209 AC_RUN_IFELSE([
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210 AC_LANG_PROGRAM([[
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211 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
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212 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
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213 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
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214 #include <stdint.h>
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215 ]
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216 gl_STDINT_INCLUDES
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217 [
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218 #include <stdio.h>
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219 #include <string.h>
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220 #define MVAL(macro) MVAL1(macro)
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221 #define MVAL1(expression) #expression
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222 static const char *macro_values[] =
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223 {
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224 #ifdef INT8_MAX
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225 MVAL (INT8_MAX),
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226 #endif
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227 #ifdef INT16_MAX
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228 MVAL (INT16_MAX),
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229 #endif
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230 #ifdef INT32_MAX
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231 MVAL (INT32_MAX),
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232 #endif
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233 #ifdef INT64_MAX
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234 MVAL (INT64_MAX),
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235 #endif
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236 #ifdef UINT8_MAX
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237 MVAL (UINT8_MAX),
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238 #endif
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239 #ifdef UINT16_MAX
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240 MVAL (UINT16_MAX),
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241 #endif
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242 #ifdef UINT32_MAX
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243 MVAL (UINT32_MAX),
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244 #endif
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245 #ifdef UINT64_MAX
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246 MVAL (UINT64_MAX),
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247 #endif
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248 NULL
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249 };
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250 ]], [[
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251 const char **mv;
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252 for (mv = macro_values; *mv != NULL; mv++)
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253 {
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254 const char *value = *mv;
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255 /* Test whether it looks like a cast expression. */
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256 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
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257 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
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258 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
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259 || strncmp (value, "((int)"/*)*/, 6) == 0
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260 || strncmp (value, "((signed short)"/*)*/, 15) == 0
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261 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
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262 return 1;
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263 }
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264 return 0;
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265 ]])],
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266 [gl_cv_header_working_stdint_h=yes],
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267 [],
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268 [dnl When cross-compiling, assume it works.
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269 gl_cv_header_working_stdint_h=yes
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270 ])
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271 ])
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272 ])
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273 fi
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274 if test "$gl_cv_header_working_stdint_h" = yes; then
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275 STDINT_H=
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276 else
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277 dnl Check for <sys/inttypes.h>, and for
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278 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
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279 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
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280 if test $ac_cv_header_sys_inttypes_h = yes; then
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281 HAVE_SYS_INTTYPES_H=1
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282 else
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283 HAVE_SYS_INTTYPES_H=0
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284 fi
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285 AC_SUBST([HAVE_SYS_INTTYPES_H])
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286 if test $ac_cv_header_sys_bitypes_h = yes; then
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287 HAVE_SYS_BITYPES_H=1
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288 else
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289 HAVE_SYS_BITYPES_H=0
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290 fi
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291 AC_SUBST([HAVE_SYS_BITYPES_H])
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292
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293 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
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294 dnl character support).
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295 AC_CHECK_HEADERS_ONCE([wchar.h])
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296
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297 gl_STDINT_TYPE_PROPERTIES
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298 STDINT_H=stdint.h
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299 fi
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300 AC_SUBST([STDINT_H])
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301 ])
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302
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303 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
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304 dnl Determine the size of each of the given types in bits.
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305 AC_DEFUN([gl_STDINT_BITSIZEOF],
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306 [
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307 dnl Use a shell loop, to avoid bloating configure, and
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308 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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309 dnl config.h.in,
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310 dnl - extra AC_SUBST calls, so that the right substitutions are made.
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311 m4_foreach_w([gltype], [$1],
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312 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
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313 [Define to the number of bits in type ']gltype['.])])
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314 for gltype in $1 ; do
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315 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
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316 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
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317 [$2
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318 #include <limits.h>], [result=unknown])
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319 eval gl_cv_bitsizeof_${gltype}=\$result
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320 ])
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321 eval result=\$gl_cv_bitsizeof_${gltype}
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322 if test $result = unknown; then
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323 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
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324 dnl do a syntax check even on unused #if conditions and give an error
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325 dnl on valid C code like this:
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326 dnl #if 0
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327 dnl # if > 32
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328 dnl # endif
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329 dnl #endif
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330 result=0
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331 fi
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332 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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333 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
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334 eval BITSIZEOF_${GLTYPE}=\$result
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335 done
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336 m4_foreach_w([gltype], [$1],
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337 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
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338 ])
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339
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340 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
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341 dnl Determine the signedness of each of the given types.
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342 dnl Define HAVE_SIGNED_TYPE if type is signed.
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343 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
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344 [
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345 dnl Use a shell loop, to avoid bloating configure, and
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346 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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347 dnl config.h.in,
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348 dnl - extra AC_SUBST calls, so that the right substitutions are made.
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349 m4_foreach_w([gltype], [$1],
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350 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
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351 [Define to 1 if ']gltype[' is a signed integer type.])])
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352 for gltype in $1 ; do
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353 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
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354 [AC_COMPILE_IFELSE(
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355 [AC_LANG_PROGRAM([$2[
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356 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
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357 result=yes, result=no)
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358 eval gl_cv_type_${gltype}_signed=\$result
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359 ])
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360 eval result=\$gl_cv_type_${gltype}_signed
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361 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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362 if test "$result" = yes; then
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363 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
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364 eval HAVE_SIGNED_${GLTYPE}=1
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365 else
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366 eval HAVE_SIGNED_${GLTYPE}=0
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367 fi
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368 done
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369 m4_foreach_w([gltype], [$1],
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370 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
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371 ])
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372
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373 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
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374 dnl Determine the suffix to use for integer constants of the given types.
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375 dnl Define t_SUFFIX for each such type.
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376 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
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377 [
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378 dnl Use a shell loop, to avoid bloating configure, and
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379 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
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380 dnl config.h.in,
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381 dnl - extra AC_SUBST calls, so that the right substitutions are made.
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382 m4_foreach_w([gltype], [$1],
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383 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
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384 [Define to l, ll, u, ul, ull, etc., as suitable for
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385 constants of type ']gltype['.])])
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386 for gltype in $1 ; do
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387 AC_CACHE_CHECK([for $gltype integer literal suffix],
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388 [gl_cv_type_${gltype}_suffix],
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389 [eval gl_cv_type_${gltype}_suffix=no
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390 eval result=\$gl_cv_type_${gltype}_signed
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391 if test "$result" = yes; then
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392 glsufu=
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393 else
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394 glsufu=u
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395 fi
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396 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
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397 case $glsuf in
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398 '') gltype1='int';;
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399 l) gltype1='long int';;
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400 ll) gltype1='long long int';;
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401 i64) gltype1='__int64';;
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402 u) gltype1='unsigned int';;
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403 ul) gltype1='unsigned long int';;
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404 ull) gltype1='unsigned long long int';;
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405 ui64)gltype1='unsigned __int64';;
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406 esac
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407 AC_COMPILE_IFELSE(
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408 [AC_LANG_PROGRAM([$2[
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409 extern $gltype foo;
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410 extern $gltype1 foo;]])],
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411 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
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412 eval result=\$gl_cv_type_${gltype}_suffix
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413 test "$result" != no && break
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414 done])
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415 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
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416 eval result=\$gl_cv_type_${gltype}_suffix
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417 test "$result" = no && result=
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418 eval ${GLTYPE}_SUFFIX=\$result
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419 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
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420 done
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421 m4_foreach_w([gltype], [$1],
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422 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
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423 ])
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424
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425 dnl gl_STDINT_INCLUDES
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426 AC_DEFUN([gl_STDINT_INCLUDES],
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427 [[
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428 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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429 included before <wchar.h>. */
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430 #include <stddef.h>
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431 #include <signal.h>
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432 #if HAVE_WCHAR_H
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433 # include <stdio.h>
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434 # include <time.h>
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435 # include <wchar.h>
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436 #endif
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437 ]])
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438
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439 dnl gl_STDINT_TYPE_PROPERTIES
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440 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
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441 dnl of interest to stdint.in.h.
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442 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
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443 [
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444 AC_REQUIRE([gl_MULTIARCH])
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445 if test $APPLE_UNIVERSAL_BUILD = 0; then
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446 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
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447 [gl_STDINT_INCLUDES])
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448 fi
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449 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
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450 [gl_STDINT_INCLUDES])
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451 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
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452 [gl_STDINT_INCLUDES])
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453 gl_cv_type_ptrdiff_t_signed=yes
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454 gl_cv_type_size_t_signed=no
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455 if test $APPLE_UNIVERSAL_BUILD = 0; then
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456 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
|
|
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457 [gl_STDINT_INCLUDES])
|
|
|
458 fi
|
|
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459 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
|
|
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460 [gl_STDINT_INCLUDES])
|
|
|
461 ])
|
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462
|
|
|
463 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
|
|
|
464 dnl Remove this when we can assume autoconf >= 2.61.
|
|
|
465 m4_ifdef([AC_COMPUTE_INT], [], [
|
|
|
466 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
|
|
|
467 ])
|
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468
|
|
|
469 # Hey Emacs!
|
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|
470 # Local Variables:
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471 # indent-tabs-mode: nil
|
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472 # End:
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