Fix warning when _POSIX_MAPPED_FILES is already defined in unistd.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8436 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/ExecutionEngine/JIT/JITEmitter.cpp b/lib/ExecutionEngine/JIT/JITEmitter.cpp
index 0a692c6ec87e6f93e8c040bb7320fe6f110812c3..59e7eba4be1bf71707fa7bf06dfbcae91c928b05 100644 (file)
--- a/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -41,7 +41,9 @@ namespace {
   };
 }
 
+#ifndef _POSIX_MAPPED_FILES
 #define _POSIX_MAPPED_FILES
+#endif
 #include <unistd.h>
 #include <sys/mman.h>