[PATCH] Initial AIX portability fixes.

Added an AIX clause in the Makefile; that clause likely
will be wrong for any AIX pre-5.2, but I can only test
on 5.3.  mailinfo.c was missing the compat header file,
and convert-objects.c needs to define a specific
_XOPEN_SOURCE as well as _XOPEN_SOURCE_EXTENDED.

Signed-off-by: E. Jason Riedy <ejr@cs.berkeley.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Makefile

@@ -243,6 +243,10 @@ ifeq ($(uname_S),NetBSD)
 	ALL_CFLAGS += -I/usr/pkg/include
 	ALL_LDFLAGS += -L/usr/pkg/lib -Wl,-rpath,/usr/pkg/lib
 endif
+ifeq ($(uname_S),AIX)
+	NO_STRCASESTR=YesPlease
+	NEEDS_LIBICONV=YesPlease
+endif
 ifneq (,$(findstring arm,$(uname_M)))
 	ARM_SHA1 = YesPlease
 endif

convert-objects.c

@@ -1,4 +1,5 @@
-#define _XOPEN_SOURCE /* glibc2 needs this */
+#define _XOPEN_SOURCE 500 /* glibc2 and AIX 5.3L need this */
+#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
 #include <time.h>
 #include "cache.h"
 

mailinfo.c

@@ -8,6 +8,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <iconv.h>
+#include "git-compat-util.h"
 #include "cache.h"
 
 static FILE *cmitmsg, *patchfile;