[libxml2] Portability fixes for OS/400

[Daniel Veillard <veillard src gnome org>]

commit ca9fc43bf7a44c88b2b8bb9ac2b4da21ebac2972
Author: Patrick Monnerat <Patrick Monnerat datasphere ch>
Date:   Thu Dec 12 15:11:40 2013 +0800

    Portability fixes for OS/400

 triodef.h |    6 ++++++
 triostr.c |    4 ++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/triodef.h b/triodef.h
index fa89416..46772ee 100644
--- a/triodef.h
+++ b/triodef.h
@@ -48,6 +48,8 @@
  * based on the DECC compiler later on.
  */
 # define TRIO_PLATFORM_VMS
+#elif defined(__OS400__)
+# define TRIO_PLATFORM_OS400
 #elif defined(unix) || defined(__unix) || defined(__unix__)
 # define TRIO_PLATFORM_UNIX
 #elif defined(TRIO_COMPILER_XLC) || defined(_AIX)
@@ -98,6 +100,10 @@
 #   define TRIO_COMPILER_SUPPORTS_C94
 #  endif
 # endif
+#elif defined(TRIO_COMPILER_XLC) && defined(__EXTENDED__)
+# define TRIO_COMPILER_SUPPORTS_C89
+# define TRIO_COMPILER_SUPPORTS_C90
+# define TRIO_COMPILER_SUPPORTS_C94
 #endif
 
 #if defined(_XOPEN_SOURCE)
diff --git a/triostr.c b/triostr.c
index e507645..3c5c667 100644
--- a/triostr.c
+++ b/triostr.c
@@ -78,6 +78,10 @@
 # else
 #  define strcasecmp(x,y) strcmpi(x,y)
 # endif
+#elif defined(TRIO_PLATFORM_OS400)
+# define USE_STRCASECMP
+# define USE_STRNCASECMP
+# include <strings.h>
 #endif
 
 #if !(defined(TRIO_PLATFORM_SUNOS))