-# wcwidth.m4 serial 14
-dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
+# wcwidth.m4 serial 17
+dnl Copyright (C) 2006-2010 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_FUNC_WCWIDTH],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
dnl Persuade glibc <wchar.h> to declare wcwidth().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
HAVE_DECL_WCWIDTH=0
fi
- if test $ac_cv_func_wcwidth = no; then
- REPLACE_WCWIDTH=1
- else
+ if test $ac_cv_func_wcwidth = yes; then
dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
dnl This leads to bugs in 'ls' (coreutils).
AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
[gl_cv_func_wcwidth_works],
[
- AC_TRY_RUN([
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
#include <locale.h>
/* AIX 3.2.5 declares wcwidth in <string.h>. */
#include <string.h>
if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0)
return 1;
return 0;
-}], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no],
- [gl_cv_func_wcwidth_works="guessing no"])
+}]])],
+ [gl_cv_func_wcwidth_works=yes],
+ [gl_cv_func_wcwidth_works=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on glibc and AIX 7 systems.
+ *-gnu* | aix[7-9]*) gl_cv_func_wcwidth_works="guessing yes";;
+ *) gl_cv_func_wcwidth_works="guessing no";;
+ esac
+changequote([,])dnl
+ ])
])
case "$gl_cv_func_wcwidth_works" in
*yes) ;;
*no) REPLACE_WCWIDTH=1 ;;
esac
fi
- if test $REPLACE_WCWIDTH = 1; then
+ if test $ac_cv_func_wcwidth != yes || test $REPLACE_WCWIDTH = 1; then
AC_LIBOBJ([wcwidth])
fi
-
- if test $REPLACE_WCWIDTH = 1 || test $HAVE_DECL_WCWIDTH = 0; then
+ if test $ac_cv_func_wcwidth != yes || test $REPLACE_WCWIDTH = 1 \
+ || test $HAVE_DECL_WCWIDTH = 0; then
gl_REPLACE_WCHAR_H
fi
+ dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
+ dnl have the wcwidth function, then it does not declare it.
])