1# wctype_h.m4 serial 30 2 3dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it. 4 5dnl Copyright (C) 2006-2022 Free Software Foundation, Inc. 6dnl This file is free software; the Free Software Foundation 7dnl gives unlimited permission to copy and/or distribute it, 8dnl with or without modifications, as long as this notice is preserved. 9 10dnl Written by Paul Eggert. 11 12AC_DEFUN_ONCE([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 AC_REQUIRE([gl_TYPE_WINT_T_PREREQ]) 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 #include <wchar.h> 45 #include <wctype.h> 46 int main () { return iswprint ('x') == 0; } 47 ]])], 48 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no], 49 [dnl Guess no on Linux libc5, yes otherwise. 50 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h> 51 #if __GNU_LIBRARY__ == 1 52 Linux libc5 i18n is broken. 53 #endif]], [[]])], 54 [gl_cv_func_iswcntrl_works="guessing yes"], 55 [gl_cv_func_iswcntrl_works="guessing no"]) 56 ]) 57 ]) 58 fi 59 HAVE_WCTYPE_H=1 60 else 61 HAVE_WCTYPE_H=0 62 fi 63 AC_SUBST([HAVE_WCTYPE_H]) 64 65 if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then 66 REPLACE_ISWCNTRL=1 67 else 68 case "$gl_cv_func_iswcntrl_works" in 69 *yes) REPLACE_ISWCNTRL=0 ;; 70 *) REPLACE_ISWCNTRL=1 ;; 71 esac 72 fi 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 [[#include <wchar.h> 89 #if HAVE_WCTYPE_H 90 # include <wctype.h> 91 #endif 92 ]]) 93 if test $ac_cv_have_decl_towlower = yes; then 94 dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and 95 dnl towupper() although it does not have the functions. Avoid a 96 dnl collision with gnulib's replacement. 97 REPLACE_TOWLOWER=1 98 else 99 REPLACE_TOWLOWER=0 100 fi 101 fi 102 fi 103 AC_SUBST([REPLACE_TOWLOWER]) 104 105 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then 106 dnl Redefine towlower, towupper in <wctype.h>. 107 : 108 fi 109 110 dnl We assume that the wctype() and iswctype() functions exist if and only 111 dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that 112 dnl exists. 113 dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>. 114 AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t], 115 [AC_COMPILE_IFELSE( 116 [AC_LANG_PROGRAM( 117 [[#include <wchar.h> 118 #if HAVE_WCTYPE_H 119 # include <wctype.h> 120 #endif 121 wctype_t a; 122 ]], 123 [[]])], 124 [gl_cv_type_wctype_t=yes], 125 [gl_cv_type_wctype_t=no]) 126 ]) 127 if test $gl_cv_type_wctype_t = no; then 128 HAVE_WCTYPE_T=0 129 fi 130 131 dnl We assume that the wctrans() and towctrans() functions exist if and only 132 dnl if the type wctrans_t is defined in <wctype.h>. 133 AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t], 134 [AC_COMPILE_IFELSE( 135 [AC_LANG_PROGRAM( 136 [[#include <wchar.h> 137 #include <wctype.h> 138 wctrans_t a; 139 ]], 140 [[]])], 141 [gl_cv_type_wctrans_t=yes], 142 [gl_cv_type_wctrans_t=no]) 143 ]) 144 if test $gl_cv_type_wctrans_t = no; then 145 HAVE_WCTRANS_T=0 146 fi 147 148 dnl Check for declarations of anything we want to poison if the 149 dnl corresponding gnulib module is not in use. 150 gl_WARN_ON_USE_PREPARE([[ 151#if !(defined __GLIBC__ && !defined __UCLIBC__) 152# include <wchar.h> 153#endif 154#include <wctype.h> 155 ]], 156 [wctype iswctype wctrans towctrans 157 ]) 158]) 159 160# gl_WCTYPE_MODULE_INDICATOR([modulename]) 161# sets the shell variable that indicates the presence of the given module 162# to a C preprocessor expression that will evaluate to 1. 163# This macro invocation must not occur in macros that are AC_REQUIREd. 164AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR], 165[ 166 dnl Ensure to expand the default settings once only. 167 gl_WCTYPE_H_REQUIRE_DEFAULTS 168 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) 169 dnl Define it also as a C macro, for the benefit of the unit tests. 170 gl_MODULE_INDICATOR_FOR_TESTS([$1]) 171]) 172 173# Initializes the default values for AC_SUBSTed shell variables. 174# This macro must not be AC_REQUIREd. It must only be invoked, and only 175# outside of macros or in macros that are not AC_REQUIREd. 176AC_DEFUN([gl_WCTYPE_H_REQUIRE_DEFAULTS], 177[ 178 m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS], [ 179 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWBLANK]) 180 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWDIGIT]) 181 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWXDIGIT]) 182 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTYPE]) 183 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWCTYPE]) 184 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTRANS]) 185 gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOWCTRANS]) 186 ]) 187 m4_require(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS]) 188 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) 189]) 190 191AC_DEFUN([gl_WCTYPE_H_DEFAULTS], 192[ 193 dnl Assume proper GNU behavior unless another module says otherwise. 194 HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK]) 195 HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T]) 196 HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T]) 197 REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK]) 198 REPLACE_ISWDIGIT=0; AC_SUBST([REPLACE_ISWDIGIT]) 199 REPLACE_ISWXDIGIT=0; AC_SUBST([REPLACE_ISWXDIGIT]) 200]) 201