(MB_LEN_MAX): Make sure it's at least 6, to avoid buggy C libraries.

diff --git a/lib/unicodeio.c b/lib/unicodeio.c
index b70c5b476dc574cd34fa5b36e4a5ce29b45ef946..c753e3d509299d53e312e426a1be298544d0578a 100644 (file)
--- a/lib/unicodeio.c
+++ b/lib/unicodeio.c
@@ -42,8 +42,12 @@ extern int errno;
 #if HAVE_LIMITS_H
 # include <limits.h>
 #endif
-#ifndef MB_LEN_MAX
-# define MB_LEN_MAX 1
+
+/* MB_LEN_MAX is incorrectly defined to be 1 in at least one GCC
+   installation; work around this configuration error.  */
+#if MB_LEN_MAX < 6
+# undef MB_LEN_MAX
+# define MB_LEN_MAX 6
 #endif
 
 #if HAVE_ICONV