3 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
5 dnl Copyright (C) 2006-2009 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([AC_PROG_CC])
15 AC_REQUIRE([AC_CANONICAL_HOST])
16 AC_CHECK_FUNCS_ONCE([iswcntrl])
17 if test $ac_cv_func_iswcntrl = yes; then
22 AC_SUBST([HAVE_ISWCNTRL])
23 AC_CHECK_HEADERS_ONCE([wctype.h])
24 AC_REQUIRE([AC_C_INLINE])
26 AC_REQUIRE([gt_TYPE_WINT_T])
27 if test $gt_cv_c_wint_t = yes; then
32 AC_SUBST([HAVE_WINT_T])
35 if test $ac_cv_header_wctype_h = yes; then
36 if test $ac_cv_func_iswcntrl = yes; then
37 dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
38 dnl The other functions are likely broken in the same way.
39 AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
41 AC_RUN_IFELSE([AC_LANG_SOURCE([[
47 int main () { return iswprint ('x') == 0; }]])],
48 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
49 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
50 #if __GNU_LIBRARY__ == 1
51 Linux libc5 i18n is broken.
53 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
56 if test $gl_cv_func_iswcntrl_works = yes; then
59 dnl On mingw, towlower and towupper return random high 16 bits.
62 dnl iswcntrl works. towlower and towupper work as well.
68 dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,
69 dnl for the benefit of builds from non-distclean directories.
70 gl_CHECK_NEXT_HEADERS([wctype.h])
75 AC_SUBST([HAVE_WCTYPE_H])
78 if test "$gl_cv_func_iswcntrl_works" = no; then
83 AC_SUBST([REPLACE_ISWCNTRL])