X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fwcwidth.m4;h=bf39d1d238c6fa1ee4b238aba01b32fe5728333a;hb=2df78ba2ce9441243a0e3aa5fa5f5e869af23c51;hp=ef5404eab99703b9df2b7a36c30eee8be5a3f493;hpb=b2e2010c7c902235b5efb5bd3c6529f61b093aa4;p=gnulib.git

diff --git a/m4/wcwidth.m4 b/m4/wcwidth.m4
index ef5404eab..bf39d1d23 100644
--- a/m4/wcwidth.m4
+++ b/m4/wcwidth.m4
@@ -1,5 +1,5 @@
-# wcwidth.m4 serial 15
-dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
+# wcwidth.m4 serial 18
+dnl Copyright (C) 2006-2011 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.
@@ -34,16 +34,15 @@ AC_DEFUN([gl_FUNC_WCWIDTH],
     HAVE_DECL_WCWIDTH=0
   fi
 
-  if test $ac_cv_func_wcwidth = no; then
-    REPLACE_WCWIDTH=1
-  else
+  if test $ac_cv_func_wcwidth = yes; then
     dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
     dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
     dnl This leads to bugs in 'ls' (coreutils).
     AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
       [gl_cv_func_wcwidth_works],
       [
-        AC_TRY_RUN([
+        AC_RUN_IFELSE(
+          [AC_LANG_SOURCE([[
 #include <locale.h>
 /* AIX 3.2.5 declares wcwidth in <string.h>. */
 #include <string.h>
@@ -64,17 +63,24 @@ int wcwidth (int);
 #endif
 int main ()
 {
+  int result = 0;
   if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
-    if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0)
-      return 1;
-  return 0;
-}], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no],
+    {
+      if (wcwidth (0x0301) > 0)
+        result |= 1;
+      if (wcwidth (0x200B) > 0)
+        result |= 2;
+    }
+  return result;
+}]])],
+          [gl_cv_func_wcwidth_works=yes],
+          [gl_cv_func_wcwidth_works=no],
           [
 changequote(,)dnl
            case "$host_os" in
-                     # Guess yes on glibc systems.
-             *-gnu*) gl_cv_func_wcwidth_works="guessing yes";;
-             *)      gl_cv_func_wcwidth_works="guessing no";;
+                     # 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
           ])
@@ -84,11 +90,13 @@ changequote([,])dnl
       *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.
 ])