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| 1 # wctype_h.m4 serial 17 |
| 2 |
| 3 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it. |
| 4 |
| 5 dnl Copyright (C) 2006-2012 Free Software Foundation, Inc. |
| 6 dnl This file is free software; the Free Software Foundation |
| 7 dnl gives unlimited permission to copy and/or distribute it, |
| 8 dnl with or without modifications, as long as this notice is preserved. |
| 9 |
| 10 dnl Written by Paul Eggert. |
| 11 |
| 12 AC_DEFUN([gl_WCTYPE_H], |
| 13 [ |
| 14 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) |
| 15 AC_REQUIRE([AC_PROG_CC]) |
| 16 AC_REQUIRE([AC_CANONICAL_HOST]) |
| 17 AC_CHECK_FUNCS_ONCE([iswcntrl]) |
| 18 if test $ac_cv_func_iswcntrl = yes; then |
| 19 HAVE_ISWCNTRL=1 |
| 20 else |
| 21 HAVE_ISWCNTRL=0 |
| 22 fi |
| 23 AC_SUBST([HAVE_ISWCNTRL]) |
| 24 |
| 25 AC_REQUIRE([AC_C_INLINE]) |
| 26 |
| 27 AC_REQUIRE([gt_TYPE_WINT_T]) |
| 28 if test $gt_cv_c_wint_t = yes; then |
| 29 HAVE_WINT_T=1 |
| 30 else |
| 31 HAVE_WINT_T=0 |
| 32 fi |
| 33 AC_SUBST([HAVE_WINT_T]) |
| 34 |
| 35 gl_CHECK_NEXT_HEADERS([wctype.h]) |
| 36 if test $ac_cv_header_wctype_h = yes; then |
| 37 if test $ac_cv_func_iswcntrl = yes; then |
| 38 dnl Linux libc5 has an iswprint function that returns 0 for all arguments. |
| 39 dnl The other functions are likely broken in the same way. |
| 40 AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works], |
| 41 [ |
| 42 AC_RUN_IFELSE( |
| 43 [AC_LANG_SOURCE([[ |
| 44 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 45 included before <wchar.h>. |
| 46 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 47 must be included before <wchar.h>. */ |
| 48 #include <stddef.h> |
| 49 #include <stdio.h> |
| 50 #include <time.h> |
| 51 #include <wchar.h> |
| 52 #include <wctype.h> |
| 53 int main () { return iswprint ('x') == 0; } |
| 54 ]])], |
| 55 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no], |
| 56 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h> |
| 57 #if __GNU_LIBRARY__ == 1 |
| 58 Linux libc5 i18n is broken. |
| 59 #endif]], [])], |
| 60 [gl_cv_func_iswcntrl_works="guessing yes"], |
| 61 [gl_cv_func_iswcntrl_works="guessing no"]) |
| 62 ]) |
| 63 ]) |
| 64 fi |
| 65 HAVE_WCTYPE_H=1 |
| 66 else |
| 67 HAVE_WCTYPE_H=0 |
| 68 fi |
| 69 AC_SUBST([HAVE_WCTYPE_H]) |
| 70 |
| 71 case "$gl_cv_func_iswcntrl_works" in |
| 72 *yes) REPLACE_ISWCNTRL=0 ;; |
| 73 *) REPLACE_ISWCNTRL=1 ;; |
| 74 esac |
| 75 AC_SUBST([REPLACE_ISWCNTRL]) |
| 76 |
| 77 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then |
| 78 dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>. |
| 79 : |
| 80 fi |
| 81 |
| 82 if test $REPLACE_ISWCNTRL = 1; then |
| 83 REPLACE_TOWLOWER=1 |
| 84 else |
| 85 AC_CHECK_FUNCS([towlower]) |
| 86 if test $ac_cv_func_towlower = yes; then |
| 87 REPLACE_TOWLOWER=0 |
| 88 else |
| 89 AC_CHECK_DECLS([towlower],,, |
| 90 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 91 included before <wchar.h>. |
| 92 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 93 must be included before <wchar.h>. */ |
| 94 #include <stddef.h> |
| 95 #include <stdio.h> |
| 96 #include <time.h> |
| 97 #include <wchar.h> |
| 98 #if HAVE_WCTYPE_H |
| 99 # include <wctype.h> |
| 100 #endif |
| 101 ]]) |
| 102 if test $ac_cv_have_decl_towlower = yes; then |
| 103 dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and |
| 104 dnl towupper() although it does not have the functions. Avoid a |
| 105 dnl collision with gnulib's replacement. |
| 106 REPLACE_TOWLOWER=1 |
| 107 else |
| 108 REPLACE_TOWLOWER=0 |
| 109 fi |
| 110 fi |
| 111 fi |
| 112 AC_SUBST([REPLACE_TOWLOWER]) |
| 113 |
| 114 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then |
| 115 dnl Redefine towlower, towupper in <wctype.h>. |
| 116 : |
| 117 fi |
| 118 |
| 119 dnl We assume that the wctype() and iswctype() functions exist if and only |
| 120 dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that |
| 121 dnl exists. |
| 122 dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>. |
| 123 AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t], |
| 124 [AC_COMPILE_IFELSE( |
| 125 [AC_LANG_PROGRAM( |
| 126 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 127 included before <wchar.h>. |
| 128 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 129 must be included before <wchar.h>. */ |
| 130 #include <stddef.h> |
| 131 #include <stdio.h> |
| 132 #include <time.h> |
| 133 #include <wchar.h> |
| 134 #if HAVE_WCTYPE_H |
| 135 # include <wctype.h> |
| 136 #endif |
| 137 wctype_t a; |
| 138 ]], |
| 139 [[]])], |
| 140 [gl_cv_type_wctype_t=yes], |
| 141 [gl_cv_type_wctype_t=no]) |
| 142 ]) |
| 143 if test $gl_cv_type_wctype_t = no; then |
| 144 HAVE_WCTYPE_T=0 |
| 145 fi |
| 146 |
| 147 dnl We assume that the wctrans() and towctrans() functions exist if and only |
| 148 dnl if the type wctrans_t is defined in <wctype.h>. |
| 149 AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t], |
| 150 [AC_COMPILE_IFELSE( |
| 151 [AC_LANG_PROGRAM( |
| 152 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 153 included before <wchar.h>. |
| 154 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 155 must be included before <wchar.h>. */ |
| 156 #include <stddef.h> |
| 157 #include <stdio.h> |
| 158 #include <time.h> |
| 159 #include <wchar.h> |
| 160 #include <wctype.h> |
| 161 wctrans_t a; |
| 162 ]], |
| 163 [[]])], |
| 164 [gl_cv_type_wctrans_t=yes], |
| 165 [gl_cv_type_wctrans_t=no]) |
| 166 ]) |
| 167 if test $gl_cv_type_wctrans_t = no; then |
| 168 HAVE_WCTRANS_T=0 |
| 169 fi |
| 170 |
| 171 dnl Check for declarations of anything we want to poison if the |
| 172 dnl corresponding gnulib module is not in use. |
| 173 gl_WARN_ON_USE_PREPARE([[ |
| 174 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| 175 <wchar.h>. |
| 176 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| 177 included before <wchar.h>. */ |
| 178 #if !(defined __GLIBC__ && !defined __UCLIBC__) |
| 179 # include <stddef.h> |
| 180 # include <stdio.h> |
| 181 # include <time.h> |
| 182 # include <wchar.h> |
| 183 #endif |
| 184 #include <wctype.h> |
| 185 ]], |
| 186 [wctype iswctype wctrans towctrans |
| 187 ]) |
| 188 ]) |
| 189 |
| 190 AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR], |
| 191 [ |
| 192 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| 193 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) |
| 194 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| 195 dnl Define it also as a C macro, for the benefit of the unit tests. |
| 196 gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| 197 ]) |
| 198 |
| 199 AC_DEFUN([gl_WCTYPE_H_DEFAULTS], |
| 200 [ |
| 201 GNULIB_ISWBLANK=0; AC_SUBST([GNULIB_ISWBLANK]) |
| 202 GNULIB_WCTYPE=0; AC_SUBST([GNULIB_WCTYPE]) |
| 203 GNULIB_ISWCTYPE=0; AC_SUBST([GNULIB_ISWCTYPE]) |
| 204 GNULIB_WCTRANS=0; AC_SUBST([GNULIB_WCTRANS]) |
| 205 GNULIB_TOWCTRANS=0; AC_SUBST([GNULIB_TOWCTRANS]) |
| 206 dnl Assume proper GNU behavior unless another module says otherwise. |
| 207 HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK]) |
| 208 HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T]) |
| 209 HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T]) |
| 210 REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK]) |
| 211 ]) |
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