# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1258970742 -3600
# Node ID 97d443c1572f5c0d0146123fd7e41d826e718ef2
# Parent  9f98da6e2275e603a5b2ff46cf8a9fe3279757a0
duplocale: Add support for glibc 2.3.x.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-11-23  Bruno Haible  <bruno@clisp.org>
+
+	duplocale: Add support for glibc 2.3.x.
+	* lib/duplocale.c (rpl_duplocale): Add fallback code for glibc 2.3.x.
+
 2009-11-22  Bruno Haible  <bruno@clisp.org>
 
 	vasnprintf: Tiny optimization.
diff --git a/lib/duplocale.c b/lib/duplocale.c
--- a/lib/duplocale.c
+++ b/lib/duplocale.c
@@ -70,10 +70,16 @@
 	  , { LC_IDENTIFICATION, LC_IDENTIFICATION_MASK }
 #endif
 	};
-      const char *base_name = nl_langinfo (_NL_LOCALE_NAME (LC_CTYPE));
-      locale_t base_copy = newlocale (LC_ALL_MASK, base_name, NULL);
+      const char *base_name;
+      locale_t base_copy;
       unsigned int i;
 
+      base_name = nl_langinfo (_NL_LOCALE_NAME (LC_CTYPE));
+      if (base_name[0] == '\0')
+	/* Fallback code for glibc < 2.4, which did not implement
+	   nl_langinfo (_NL_LOCALE_NAME (category)).  */
+	base_name = setlocale (LC_CTYPE, NULL);
+      base_copy = newlocale (LC_ALL_MASK, base_name, NULL);
       if (base_copy == NULL)
 	return NULL;
 
@@ -82,6 +88,10 @@
 	  int category = categories[i].cat;
 	  int category_mask = categories[i].mask;
 	  const char *name = nl_langinfo (_NL_LOCALE_NAME (category));
+	  if (name[0] == '\0')
+	    /* Fallback code for glibc < 2.4, which did not implement
+	       nl_langinfo (_NL_LOCALE_NAME (category)).  */
+	    name = setlocale (category, NULL);
 	  if (strcmp (name, base_name) != 0)
 	    {
 	      locale_t copy = newlocale (category_mask, name, base_copy);