+# wctype.m4 serial 4
+
dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_WCTYPE_H],
[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([iswcntrl])
+ if test $ac_cv_func_iswcntrl = yes; then
+ HAVE_ISWCNTRL=1
+ else
+ HAVE_ISWCNTRL=0
+ fi
+ AC_SUBST([HAVE_ISWCNTRL])
AC_CHECK_HEADERS_ONCE([wctype.h])
AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([gt_TYPE_WINT_T])
+ if test $gt_cv_c_wint_t = yes; then
+ HAVE_WINT_T=1
+ else
+ HAVE_WINT_T=0
+ fi
AC_SUBST([HAVE_WINT_T])
+ WCTYPE_H=wctype.h
if test $ac_cv_header_wctype_h = yes; then
- gl_ABSOLUTE_HEADER([wctype.h])
- ABSOLUTE_WCTYPE_H=\"$gl_cv_absolute_wctype_h\"
+ if test $ac_cv_func_iswcntrl = yes; then
+ dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
+ dnl The other functions are likely broken in the same way.
+ AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
+ [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <stddef.h>
+ #include <stdio.h>
+ #include <time.h>
+ #include <wchar.h>
+ #include <wctype.h>
+ int main () { return iswprint ('x') == 0; }]])],
+ [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
+ #if __GNU_LIBRARY__ == 1
+ Linux libc5 i18n is broken.
+ #endif]], [])],
+ [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
+ ])
+ ])
+ if test $gl_cv_func_iswcntrl_works = yes; then
+ case "$host_os" in
+ mingw*)
+ dnl On mingw, towlower and towupper return random high 16 bits.
+ ;;
+ *)
+ dnl iswcntrl works. towlower and towupper work as well.
+ WCTYPE_H=
+ ;;
+ esac
+ fi
+ fi
+ dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,
+ dnl for the benefit of builds from non-distclean directories.
+ gl_CHECK_NEXT_HEADERS([wctype.h])
HAVE_WCTYPE_H=1
else
- ABSOLUTE_WCTYPE_H=\"no/such/file/wctype.h\"
HAVE_WCTYPE_H=0
fi
- AC_SUBST([ABSOLUTE_WCTYPE_H])
AC_SUBST([HAVE_WCTYPE_H])
+ AC_SUBST([WCTYPE_H])
- WCTYPE_H=wctype.h
- HAVE_WCTYPE_CTMP_BUG=0
- if test $ac_cv_header_wctype_h = yes; then
- dnl IRIX 5.3 has a bug: its isw* macros reference an undefined variable
- dnl _ctmp_. Test against this bug.
- AC_CACHE_CHECK([whether wctype macros need _ctmp_ declared],
- [gl_cv_wctype_ctmp_bug],
- [gl_cv_wctype_ctmp_bug=no
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <wctype.h>
- ]],
- [[return iswprint (0);]])],
- [gl_cv_wctype_ctmp_bug='no, but bare wctype.h does not work'],
- [AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <wctype.h>
- static wint_t _ctmp_;]],
- [[return iswprint (0);]])],
- [gl_cv_wctype_ctmp_bug=yes])])])
- case $gl_cv_wctype_ctmp_bug,$ac_cv_func_iswcntrl in #(
- yes,*)
- HAVE_WCTYPE_CTMP_BUG=1;; #(
- no,yes)
- WCTYPE_H=;;
- esac
+ if test "$gl_cv_func_iswcntrl_works" = no; then
+ REPLACE_ISWCNTRL=1
+ else
+ REPLACE_ISWCNTRL=0
fi
- AC_SUBST([WCTYPE_H])
- AC_SUBST([HAVE_WCTYPE_CTMP_BUG])
+ AC_SUBST([REPLACE_ISWCNTRL])
])