Portability fix for IBM compiler on AIX

1 files changed, 8 insertions, 2 deletions

diff --git a/mysys/my_tempnam.c b/mysys/my_tempnam.c
index a652fae3574..d079b9f66a5 100644
--- a/mysys/my_tempnam.c
+++ b/mysys/my_tempnam.c
@@ -115,13 +115,19 @@ my_string my_tempnam(const char *dir, const char *pfx,
   old_env=(char**)environ;
   if (dir)
   {				/* Don't use TMPDIR if dir is given */
-    ((char**) environ)=(char**) temp_env;
+    /*
+      The following strange cast is required because the IBM compiler on AIX
+      doesn't allow us to cast the value of environ.
+      The cast of environ is needed as some systems doesn't allow us to
+      update environ with a char ** pointer. (const mismatch)
+    */
+    (*(char***) &environ)=(char**) temp_env;
     temp_env[0]=0;
   }
 #endif
   res=tempnam((char*) dir,(my_string) pfx); /* Use stand. dir with prefix */
 #if !defined(OS2) && !defined(__NETWARE__)
-  ((char**) environ)=(char**) old_env;
+  (*(char***) &environ)=(char**) old_env;
 #endif
   if (!res)
     DBUG_PRINT("error",("Got error: %d from tempnam",errno));