+ if test $ac_cv_func_wcwidth = yes; then
+ dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
+ dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
+ dnl This leads to bugs in 'ls' (coreutils).
+ AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
+ [gl_cv_func_wcwidth_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <locale.h>
+/* AIX 3.2.5 declares wcwidth in <string.h>. */
+#include <string.h>
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
+ before <wchar.h>. */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+#if !HAVE_DECL_WCWIDTH
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int);
+#endif
+int main ()
+{
+ int result = 0;
+ if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
+ {
+ if (wcwidth (0x0301) > 0)
+ result |= 1;
+ if (wcwidth (0x200B) > 0)
+ result |= 2;
+ }
+ return result;
+}]])],
+ [gl_cv_func_wcwidth_works=yes],
+ [gl_cv_func_wcwidth_works=no],
+ [
+changequote(,)dnl
+ case "$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 $ac_cv_func_wcwidth != yes || test $REPLACE_WCWIDTH = 1; then