[PATCH] Define MAP_NORESERVE to zero for FreeBSD

[Dimitry Andric]

Hi kcc, kutuzov.viktor.84,

The MAP_NORESERVE define has been removed in FreeBSD 11.x, and even
before that, it was never implemented.  Just define it to zero instead,
so compiler-rt can compile on FreeBSD 11 and later.

http://reviews.llvm.org/D7485

Files:
  lib/sanitizer_common/sanitizer_posix.cc

Index: lib/sanitizer_common/sanitizer_posix.cc
===================================================================
--- lib/sanitizer_common/sanitizer_posix.cc
+++ lib/sanitizer_common/sanitizer_posix.cc
@@ -30,6 +30,13 @@
 #include <sys/personality.h>
 #endif
 
+#if SANITIZER_FREEBSD
+// The MAP_NORESERVE define has been removed in FreeBSD 11.x, and even before
+// that, it was never implemented.  So just define it to zero.
+#undef  MAP_NORESERVE
+#define MAP_NORESERVE 0
+#endif
+
 namespace __sanitizer {
 
 // ------------- sanitizer_common.h

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