From d94b6146f2074608fba07421dd6185ac3a296680 Mon Sep 17 00:00:00 2001
From: "kr.angelov" <kr.angelov@gmail.com>
Date: Wed, 26 Jun 2013 07:03:32 +0000
Subject: [PATCH] compatibility issue for MacOS X

---
 src/runtime/c/pgf/jit.c                  | 8 ++------
 src/runtime/c/pgf/lightning/i386/funcs.h | 6 +++---
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/src/runtime/c/pgf/jit.c b/src/runtime/c/pgf/jit.c
index 88363e73b..9889bf4e6 100644
--- a/src/runtime/c/pgf/jit.c
+++ b/src/runtime/c/pgf/jit.c
@@ -48,16 +48,12 @@ pgf_jit_alloc_page(PgfJitState* state)
 {
 	void *page;
 
-	size_t page_size = sysconf(_SC_PAGESIZE);
+	size_t page_size = getpagesize();
 	total_size += page_size;
 
 	if (posix_memalign(&page, page_size, page_size) != 0) {
 		gu_fatal("Memory allocation failed");
 	}
-	if (mprotect(page, page_size,
-	             PROT_READ | PROT_WRITE | PROT_EXEC) != 0) {
-		gu_fatal("mprotect failed");
-	}
 
 	PgfPageFinalizer* fin = gu_new(PgfPageFinalizer, state->pool);
 	fin->fin.fn = pgf_jit_finalize_page;
@@ -85,7 +81,7 @@ pgf_jit_init(GuPool* tmp_pool, GuPool* pool)
 static void
 pgf_jit_make_space(PgfJitState* state)
 {
-	size_t page_size = sysconf(_SC_PAGESIZE);
+	size_t page_size = getpagesize();
 	if (jit_get_ip().ptr + JIT_CODE_WINDOW > ((char*) state->buf) + page_size) {
 		jit_flush_code(state->buf, jit_get_ip().ptr);
 		pgf_jit_alloc_page(state);
diff --git a/src/runtime/c/pgf/lightning/i386/funcs.h b/src/runtime/c/pgf/lightning/i386/funcs.h
index c35849956..bd9bfac4f 100644
--- a/src/runtime/c/pgf/lightning/i386/funcs.h
+++ b/src/runtime/c/pgf/lightning/i386/funcs.h
@@ -34,7 +34,7 @@
 #ifndef __lightning_funcs_h
 #define __lightning_funcs_h
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__APPLE__)
 #include <unistd.h>
 #include <sys/mman.h>
 #endif
@@ -51,7 +51,7 @@ jit_flush_code(void *dest, void *end)
      execution of the data and stack segment are becoming more
      and more common (Fedora, for example), so we implement our
      jit_flush_code as an mprotect.  */
-#ifdef __linux__
+#if defined(__linux__) || defined(__APPLE__)
   static unsigned long prev_page = 0, prev_length = 0;
   unsigned long page, length;
 #ifdef PAGESIZE
@@ -59,7 +59,7 @@ jit_flush_code(void *dest, void *end)
 #else
   static int page_size = -1;
   if (page_size == -1)
-    page_size = sysconf (_SC_PAGESIZE);
+    page_size = getpagesize();
 #endif
 
   page = (long) dest & ~(page_size - 1);