Bug#22378 Make error, strings/ctype-utf8.c, uni_plane undeclared

- Fixing utf8_general_cs according to recent changes.
- Compiling utf8_general_cs in pentium-debug-max configuration
  to avoid these problems in the future.


BUILD/compile-pentium-debug-max:
  Enable compiling of experimental collations in compile-pentium-debug-max
config/ac-macros/character_sets.m4:
  Adding hidden flag --with-experimental-collations,
  not seen in "configure --help".
strings/ctype-utf8.c:
  Compilation failure changes:
  catching up with previous character set changes:
  - uni_plane is now not a global variables
  - adding new parameter into my_strnncollsp_utf8_cs
  - adding my_strnxfrm_len into MY_COLLATION_HANDLER 
    for utf8_general_cs

1 files changed, 13 insertions, 0 deletions

diff --git a/config/ac-macros/character_sets.m4 b/config/ac-macros/character_sets.m4
index 1ab6e7dd780..8c3e8ca73b7 100644
--- a/config/ac-macros/character_sets.m4
+++ b/config/ac-macros/character_sets.m4
@@ -429,3 +429,16 @@ then
 else
   AC_MSG_RESULT(no)
 fi
+
+
+# Shall we build experimental collations
+AC_ARG_WITH(experimental-collations,
+    [],
+    [with_exp_coll=$withval],
+    [with_exp_coll=no]
+)
+
+if test "$with_exp_coll" = "yes"
+then
+  AC_DEFINE([HAVE_UTF8_GENERAL_CS], [1], [certain Japanese customer])
+fi