diff -ru tre-0.7.5/lib/tre-match-approx.c tre-0.7.5.new/lib/tre-match-approx.c
--- tre-0.7.5/lib/tre-match-approx.c	2006-12-08 19:07:03.000000000 +0000
+++ tre-0.7.5.new/lib/tre-match-approx.c	2008-01-24 19:47:12.000000000 +0000
@@ -23,24 +23,6 @@
 #include <config.h>
 #endif /* HAVE_CONFIG_H */
 
-/* AIX requires this to be the first thing in the file.	 */
-#ifdef TRE_USE_ALLOCA
-#ifndef __GNUC__
-# if HAVE_ALLOCA_H
-#  include <alloca.h>
-# else
-#  ifdef _AIX
- #pragma alloca
-#  else
-#   ifndef alloca /* predefined by HP cc +Olibcalls */
-char *alloca ();
-#   endif
-#  endif
-# endif
-#endif
-#endif /* TRE_USE_ALLOCA */
-
-#define __USE_STRING_INLINES
 #undef __NO_INLINE__
 
 #include <assert.h>