[llvm] r359758 - [Support] Don't check MAP_ANONYMOUS, just use MAP_ANON

[Fangrui Song via llvm-commits]

Author: maskray
Date: Wed May  1 22:58:09 2019
New Revision: 359758

URL: http://llvm.org/viewvc/llvm-project?rev=359758&view=rev
Log:
[Support] Don't check MAP_ANONYMOUS, just use MAP_ANON

Though being marked "deprecated" by the Linux man-pages project
(MAP_ANON is a synonym of MAP_ANONYMOUS), it is the mostly widely
available macro - many systems that don't provide MAP_ANONYMOUS have
MAP_ANON. MAP_ANON is also used here and there in compiler-rt.

Modified:
    llvm/trunk/lib/Support/Unix/Memory.inc

Modified: llvm/trunk/lib/Support/Unix/Memory.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Unix/Memory.inc?rev=359758&r1=359757&r2=359758&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Unix/Memory.inc (original)
+++ llvm/trunk/lib/Support/Unix/Memory.inc Wed May  1 22:58:09 2019
@@ -93,14 +93,7 @@ Memory::allocateMappedMemory(size_t NumB
 
   int fd = -1;
 
-  int MMFlags = MAP_PRIVATE |
-#ifdef MAP_ANONYMOUS
-  MAP_ANONYMOUS
-#else
-  MAP_ANON
-#endif
-  ; // Ends statement above
-
+  int MMFlags = MAP_PRIVATE | MAP_ANON;
   int Protect = getPosixProtectionFlags(PFlags);
 
 #if defined(__NetBSD__) && defined(PROT_MPROTECT)