1 files changed, 85 insertions, 0 deletions
diff --git a/gnulib/m4/wcwidth.m4 b/gnulib/m4/wcwidth.m4
new file mode 100644
index 0000000..04a9fc2
--- /dev/null
+++ b/gnulib/m4/wcwidth.m4
@@ -0,0 +1,85 @@
+# wcwidth.m4 serial 13
+dnl Copyright (C) 2006, 2007 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])
+
+  dnl Persuade glibc <wchar.h> to declare wcwidth().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gt_TYPE_WCHAR_T])
+  AC_REQUIRE([gt_TYPE_WINT_T])
+
+  AC_CHECK_HEADERS_ONCE([wchar.h])
+  AC_CHECK_FUNCS_ONCE([wcwidth])
+
+  AC_CHECK_DECLS([wcwidth], [], [], [
+/* 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 test $ac_cv_have_decl_wcwidth != yes; then
+    HAVE_DECL_WCWIDTH=0
+  fi
+
+  if test $ac_cv_func_wcwidth = no; then
+    REPLACE_WCWIDTH=1
+  else
+    dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
+    dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
+    dnl This leads to bugs in 'ls' (coreutils).
+    AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
+      [gl_cv_func_wcwidth_works],
+      [
+        AC_TRY_RUN([
+#include <locale.h>
+/* AIX 3.2.5 declares wcwidth in <string.h>. */
+#include <string.h>
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+   <wchar.h>.
+   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
+   before <wchar.h>.  */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+#if !HAVE_DECL_WCWIDTH
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int);
+#endif
+int main ()
+{
+  if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
+    if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0)
+      return 1;
+  return 0;
+}], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no],
+          [gl_cv_func_wcwidth_works="guessing no"])
+      ])
+    case "$gl_cv_func_wcwidth_works" in
+      *yes) ;;
+      *no) REPLACE_WCWIDTH=1 ;;
+    esac
+  fi
+  if test $REPLACE_WCWIDTH = 1; then
+    AC_LIBOBJ([wcwidth])
+  fi
+
+  if test $REPLACE_WCWIDTH = 1 || test $HAVE_DECL_WCWIDTH = 0; then
+    WCHAR_H=wchar.h
+  fi
+])