1 # wctype_h.m4 serial 15
3 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
5 dnl Copyright (C) 2006-2011 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.
10 dnl Written by Paul Eggert.
12 AC_DEFUN([gl_WCTYPE_H],
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
23 AC_SUBST([HAVE_ISWCNTRL])
25 AC_REQUIRE([AC_C_INLINE])
27 AC_REQUIRE([gt_TYPE_WINT_T])
28 if test $gt_cv_c_wint_t = yes; then
33 AC_SUBST([HAVE_WINT_T])
35 gl_CHECK_NEXT_HEADERS([wctype.h])
36 if test $ac_cv_header_wctype_h = yes; then
37 if test $ac_cv_func_iswcntrl = yes; then
38 dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
39 dnl The other functions are likely broken in the same way.
40 AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
44 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
45 included before <wchar.h>.
46 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
47 must be included before <wchar.h>. */
53 int main () { return iswprint ('x') == 0; }
55 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
56 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
57 #if __GNU_LIBRARY__ == 1
58 Linux libc5 i18n is broken.
60 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
68 AC_SUBST([HAVE_WCTYPE_H])
70 if test "$gl_cv_func_iswcntrl_works" = no; then
75 AC_SUBST([REPLACE_ISWCNTRL])
77 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
78 dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>.
82 if test $REPLACE_ISWCNTRL = 1; then
85 AC_CHECK_DECLS([towlower],,,
86 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
87 included before <wchar.h>.
88 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
89 must be included before <wchar.h>. */
98 if test $ac_cv_have_decl_towlower = yes; then
99 dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and
100 dnl towupper() although it does not have the functions. Avoid a collision
101 dnl with gnulib's replacement.
107 AC_SUBST([REPLACE_TOWLOWER])
109 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then
110 dnl Redefine towlower, towupper in <wctype.h>.
114 dnl We assume that the wctype() and iswctype() functions exist if and only
115 dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that
117 dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>.
118 AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t],
121 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
122 included before <wchar.h>.
123 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
124 must be included before <wchar.h>. */
135 [gl_cv_type_wctype_t=yes],
136 [gl_cv_type_wctype_t=no])
138 if test $gl_cv_type_wctype_t = no; then
142 dnl We assume that the wctrans() and towctrans() functions exist if and only
143 dnl if the type wctrans_t is defined in <wctype.h>.
144 AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t],
147 [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
148 included before <wchar.h>.
149 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
150 must be included before <wchar.h>. */
159 [gl_cv_type_wctrans_t=yes],
160 [gl_cv_type_wctrans_t=no])
162 if test $gl_cv_type_wctrans_t = no; then
166 dnl Check for declarations of anything we want to poison if the
167 dnl corresponding gnulib module is not in use.
168 gl_WARN_ON_USE_PREPARE([[
169 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
171 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
172 included before <wchar.h>. */
173 #if !(defined __GLIBC__ && !defined __UCLIBC__)
181 [wctype iswctype wctrans towctrans
185 AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
187 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
188 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
189 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
190 dnl Define it also as a C macro, for the benefit of the unit tests.
191 gl_MODULE_INDICATOR_FOR_TESTS([$1])
194 AC_DEFUN([gl_WCTYPE_H_DEFAULTS],
196 GNULIB_ISWBLANK=0; AC_SUBST([GNULIB_ISWBLANK])
197 GNULIB_WCTYPE=0; AC_SUBST([GNULIB_WCTYPE])
198 GNULIB_ISWCTYPE=0; AC_SUBST([GNULIB_ISWCTYPE])
199 GNULIB_WCTRANS=0; AC_SUBST([GNULIB_WCTRANS])
200 GNULIB_TOWCTRANS=0; AC_SUBST([GNULIB_TOWCTRANS])
201 dnl Assume proper GNU behavior unless another module says otherwise.
202 HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK])
203 HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T])
204 HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T])
205 REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK])