When compiling on OSX, do not inline the RNG glibc functions but use their official POSIX versions.

src/random.h

@@ -20,13 +20,10 @@
 #ifndef SWIFT_RANDOM_H
 #define SWIFT_RANDOM_H
 
-/* COde configuration */
+/* Code configuration */
 #include "../config.h"
 
 /* Standard header */
-#include <errno.h>
-#include <ieee754.h>
-#include <limits.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ -55,6 +52,12 @@ enum random_number_type {
   random_number_BH_swallow = 4947009007LL
 };
 
+#ifndef __APPLE__
+
+#include <errno.h>
+#include <ieee754.h>
+#include <limits.h>
+
 /* Inline the default RNG functions to avoid costly function calls. These
    functions are minor modifications, but functional equivalents, of their glibc
    counterparts. */
@@ -110,6 +113,17 @@ INLINE static double inl_erand48(uint16_t xsubi[3]) {
   return temp.d - 1.0;
 }
 
+#else
+
+/* In the case of OSX, we default to the platform's
+   default implementation. */
+
+INLINE static int inl_rand_r(uint32_t *seed) { return rand_r(seed); }
+
+INLINE static double inl_erand48(uint16_t xsubi[3]) { return erand48(xsubi); }
+
+#endif
+
 /**
  * @brief Returns a pseudo-random number in the range [0, 1[.
  *