[llvm] r246905 - WinCOFFObjectWriter.cpp: Roll back TimeDateStamp along ENABLE_TIMESTAMPS.

[NAKAMURA Takumi via llvm-commits]

Author: chapuni
Date: Fri Sep  4 20:17:49 2015
New Revision: 246905

URL: http://llvm.org/viewvc/llvm-project?rev=246905&view=rev
Log:
WinCOFFObjectWriter.cpp: Roll back TimeDateStamp along ENABLE_TIMESTAMPS.

We want a deterministic output. GNU AS leaves it zero.

FIXME: It may be optional by its user, like llc and clang.

Modified:
    llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp

Modified: llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp?rev=246905&r1=246904&r2=246905&view=diff
==============================================================================
--- llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp (original)
+++ llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp Fri Sep  4 20:17:49 2015
@@ -1013,12 +1013,17 @@ void WinCOFFObjectWriter::writeObject(MC
 
   Header.PointerToSymbolTable = offset;
 
+#if (ENABLE_TIMESTAMPS == 1)
   // MS LINK expects to be able to use this timestamp to implement their
   // /INCREMENTAL feature.
   std::time_t Now = time(nullptr);
   if (Now < 0 || !isUInt<32>(Now))
     Now = UINT32_MAX;
   Header.TimeDateStamp = Now;
+#else
+  // We want a deterministic output. It looks like GNU as also writes 0 in here.
+  Header.TimeDateStamp = 0;
+#endif
 
   // Write it all to disk...
   WriteFileHeader(Header);