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) 2006-2012 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([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 ]) 210
