Support for OSX build; tested using OSX 10.9/clang-500.2.79

brotli/enc/entropy_encode.cc

@@ -20,6 +20,7 @@
 #include <algorithm>
 #include <limits>
 #include <vector>
+#include <cstdlib>
 
 #include "./histogram.h"
 

brotli/enc/hash.h

@@ -23,6 +23,7 @@
 #include <string.h>
 #include <sys/types.h>
 #include <algorithm>
+#include <cstdlib>
 
 #include "./fast_log.h"
 #include "./find_match_length.h"

brotli/enc/write_bits.h

@@ -18,7 +18,11 @@
 #define BROTLI_ENC_WRITE_BITS_H_
 
 #include <assert.h>
-#include <endian.h>
+#if defined(OS_MACOSX)
+  #include <machine/endian.h>
+#else
+  #include <endian.h>
+#endif
 #include <stdint.h>
 #include <stdio.h>