Merged OSX fixes from Siesh1oo with some modifications

kernel/compatibility.h

@@ -0,0 +1,36 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef COMPATIBILITY_H
+#define COMPATIBILITY_H
+
+#if !(_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L)
+#include <stdio.h>
+#include <stdlib.h>
+
+#define open_memstream compat_open_memstream
+#define fmemopen compat_fmemopen
+
+FILE * compat_open_memstream (char ** bufp, size_t * sizep);
+FILE * compat_fmemopen (void * buf, size_t size, const char * mode);
+
+#endif /* !(_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L) */
+
+#endif /* COMPATIBILITY_H */
+