Partial patch by upstream to fix compilation on platforms without
posix_madvise.

http://vcs.pcre.org/viewvc/code/trunk/sljit/sljitUtils.c?r1=952&r2=987&pathrev=987O

--- code/trunk/sljit/sljitUtils.c	2012/03/16 12:59:30	952
+++ code/trunk/sljit/sljitUtils.c	2012/07/07 04:11:29	987
@@ -106,7 +106,7 @@
 
 #else /* _WIN32 */
 
-#include "pthread.h"
+#include <pthread.h>
 
 #if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR)
 
@@ -262,8 +262,14 @@
 	}
 	aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align;
 	aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align;
+	/* If madvise is available, we release the unnecessary space. */
+#if defined(POSIX_MADV_DONTNEED)
 	if (aligned_new_limit < aligned_old_limit)
 		posix_madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, POSIX_MADV_DONTNEED);
+#elif defined(MADV_DONTNEED)
+	if (aligned_new_limit < aligned_old_limit)
+		madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MADV_DONTNEED);
+#endif
 	stack->limit = new_limit;
 	return 0;
 #endif