Merge r6109:

Various minor changes to make these compile on AIX5.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6254

memcheck/tests/stack_switch.c

@@ -1,8 +1,18 @@
 #define _XOPEN_SOURCE 600
 #define _BSD_SOURCE
 
-#include <sched.h>
 #include <stdio.h>
+
+#if defined(_AIX)
+int main(int argc, char **argv) 
+{
+  printf("this test is linux-specific\n");
+  return 0;
+}
+
+#else
+
+#include <sched.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
@@ -53,3 +63,5 @@ int main(int argc, char **argv)
 
    exit( 0 );
 }
+
+#endif /* !defined(_AIX) */