| 1 | # wctype_h.m4 serial 18 |
| 2 | |
| 3 | dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it. |
| 4 | |
| 5 | dnl Copyright (C) 2006-2014 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([gt_TYPE_WINT_T]) |
| 26 | if test $gt_cv_c_wint_t = yes; then |
| 27 | HAVE_WINT_T=1 |
| 28 | else |
| 29 | HAVE_WINT_T=0 |
| 30 | fi |
| 31 | AC_SUBST([HAVE_WINT_T]) |
| 32 | |
| 33 | gl_CHECK_NEXT_HEADERS([wctype.h]) |
| 34 | if test $ac_cv_header_wctype_h = yes; then |
| 35 | if test $ac_cv_func_iswcntrl = yes; then |
| 36 | dnl Linux libc5 has an iswprint function that returns 0 for all arguments. |
| 37 | dnl The other functions are likely broken in the same way. |
| 38 | AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works], |
| 39 | [ |
| 40 | AC_RUN_IFELSE( |
| 41 | [AC_LANG_SOURCE([[ |
| 42 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 43 | included before <wchar.h>. |
| 44 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 45 | must be included before <wchar.h>. */ |
| 46 | #include <stddef.h> |
| 47 | #include <stdio.h> |
| 48 | #include <time.h> |
| 49 | #include <wchar.h> |
| 50 | #include <wctype.h> |
| 51 | int main () { return iswprint ('x') == 0; } |
| 52 | ]])], |
| 53 | [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no], |
| 54 | [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h> |
| 55 | #if __GNU_LIBRARY__ == 1 |
| 56 | Linux libc5 i18n is broken. |
| 57 | #endif]], [])], |
| 58 | [gl_cv_func_iswcntrl_works="guessing yes"], |
| 59 | [gl_cv_func_iswcntrl_works="guessing no"]) |
| 60 | ]) |
| 61 | ]) |
| 62 | fi |
| 63 | HAVE_WCTYPE_H=1 |
| 64 | else |
| 65 | HAVE_WCTYPE_H=0 |
| 66 | fi |
| 67 | AC_SUBST([HAVE_WCTYPE_H]) |
| 68 | |
| 69 | case "$gl_cv_func_iswcntrl_works" in |
| 70 | *yes) REPLACE_ISWCNTRL=0 ;; |
| 71 | *) REPLACE_ISWCNTRL=1 ;; |
| 72 | esac |
| 73 | AC_SUBST([REPLACE_ISWCNTRL]) |
| 74 | |
| 75 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then |
| 76 | dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>. |
| 77 | : |
| 78 | fi |
| 79 | |
| 80 | if test $REPLACE_ISWCNTRL = 1; then |
| 81 | REPLACE_TOWLOWER=1 |
| 82 | else |
| 83 | AC_CHECK_FUNCS([towlower]) |
| 84 | if test $ac_cv_func_towlower = yes; then |
| 85 | REPLACE_TOWLOWER=0 |
| 86 | else |
| 87 | AC_CHECK_DECLS([towlower],,, |
| 88 | [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 89 | included before <wchar.h>. |
| 90 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 91 | must be included before <wchar.h>. */ |
| 92 | #include <stddef.h> |
| 93 | #include <stdio.h> |
| 94 | #include <time.h> |
| 95 | #include <wchar.h> |
| 96 | #if HAVE_WCTYPE_H |
| 97 | # include <wctype.h> |
| 98 | #endif |
| 99 | ]]) |
| 100 | if test $ac_cv_have_decl_towlower = yes; then |
| 101 | dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and |
| 102 | dnl towupper() although it does not have the functions. Avoid a |
| 103 | dnl collision with gnulib's replacement. |
| 104 | REPLACE_TOWLOWER=1 |
| 105 | else |
| 106 | REPLACE_TOWLOWER=0 |
| 107 | fi |
| 108 | fi |
| 109 | fi |
| 110 | AC_SUBST([REPLACE_TOWLOWER]) |
| 111 | |
| 112 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then |
| 113 | dnl Redefine towlower, towupper in <wctype.h>. |
| 114 | : |
| 115 | fi |
| 116 | |
| 117 | dnl We assume that the wctype() and iswctype() functions exist if and only |
| 118 | dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that |
| 119 | dnl exists. |
| 120 | dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>. |
| 121 | AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t], |
| 122 | [AC_COMPILE_IFELSE( |
| 123 | [AC_LANG_PROGRAM( |
| 124 | [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 125 | included before <wchar.h>. |
| 126 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 127 | must be included before <wchar.h>. */ |
| 128 | #include <stddef.h> |
| 129 | #include <stdio.h> |
| 130 | #include <time.h> |
| 131 | #include <wchar.h> |
| 132 | #if HAVE_WCTYPE_H |
| 133 | # include <wctype.h> |
| 134 | #endif |
| 135 | wctype_t a; |
| 136 | ]], |
| 137 | [[]])], |
| 138 | [gl_cv_type_wctype_t=yes], |
| 139 | [gl_cv_type_wctype_t=no]) |
| 140 | ]) |
| 141 | if test $gl_cv_type_wctype_t = no; then |
| 142 | HAVE_WCTYPE_T=0 |
| 143 | fi |
| 144 | |
| 145 | dnl We assume that the wctrans() and towctrans() functions exist if and only |
| 146 | dnl if the type wctrans_t is defined in <wctype.h>. |
| 147 | AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t], |
| 148 | [AC_COMPILE_IFELSE( |
| 149 | [AC_LANG_PROGRAM( |
| 150 | [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be |
| 151 | included before <wchar.h>. |
| 152 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> |
| 153 | must be included before <wchar.h>. */ |
| 154 | #include <stddef.h> |
| 155 | #include <stdio.h> |
| 156 | #include <time.h> |
| 157 | #include <wchar.h> |
| 158 | #include <wctype.h> |
| 159 | wctrans_t a; |
| 160 | ]], |
| 161 | [[]])], |
| 162 | [gl_cv_type_wctrans_t=yes], |
| 163 | [gl_cv_type_wctrans_t=no]) |
| 164 | ]) |
| 165 | if test $gl_cv_type_wctrans_t = no; then |
| 166 | HAVE_WCTRANS_T=0 |
| 167 | fi |
| 168 | |
| 169 | dnl Check for declarations of anything we want to poison if the |
| 170 | dnl corresponding gnulib module is not in use. |
| 171 | gl_WARN_ON_USE_PREPARE([[ |
| 172 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| 173 | <wchar.h>. |
| 174 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| 175 | included before <wchar.h>. */ |
| 176 | #if !(defined __GLIBC__ && !defined __UCLIBC__) |
| 177 | # include <stddef.h> |
| 178 | # include <stdio.h> |
| 179 | # include <time.h> |
| 180 | # include <wchar.h> |
| 181 | #endif |
| 182 | #include <wctype.h> |
| 183 | ]], |
| 184 | [wctype iswctype wctrans towctrans |
| 185 | ]) |
| 186 | ]) |
| 187 | |
| 188 | AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR], |
| 189 | [ |
| 190 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| 191 | AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) |
| 192 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| 193 | dnl Define it also as a C macro, for the benefit of the unit tests. |
| 194 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| 195 | ]) |
| 196 | |
| 197 | AC_DEFUN([gl_WCTYPE_H_DEFAULTS], |
| 198 | [ |
| 199 | GNULIB_ISWBLANK=0; AC_SUBST([GNULIB_ISWBLANK]) |
| 200 | GNULIB_WCTYPE=0; AC_SUBST([GNULIB_WCTYPE]) |
| 201 | GNULIB_ISWCTYPE=0; AC_SUBST([GNULIB_ISWCTYPE]) |
| 202 | GNULIB_WCTRANS=0; AC_SUBST([GNULIB_WCTRANS]) |
| 203 | GNULIB_TOWCTRANS=0; AC_SUBST([GNULIB_TOWCTRANS]) |
| 204 | dnl Assume proper GNU behavior unless another module says otherwise. |
| 205 | HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK]) |
| 206 | HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T]) |
| 207 | HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T]) |
| 208 | REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK]) |
| 209 | ]) |