[llvm] r196341 - Produce deterministic coff files.

[Sean Silva]

On Tue, Dec 3, 2013 at 9:02 PM, Rafael Espindola <rafael.espindola at gmail.com
> wrote:

> Author: rafael
> Date: Tue Dec  3 20:02:55 2013
> New Revision: 196341
>
> URL: http://llvm.org/viewvc/llvm-project?rev=196341&view=rev
> Log:
> Produce deterministic coff files.
>
> Added:
>     llvm/trunk/test/MC/COFF/timestamp.s
> 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=196341&r1=196340&r2=196341&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp (original)
> +++ llvm/trunk/lib/MC/WinCOFFObjectWriter.cpp Tue Dec  3 20:02:55 2013
> @@ -845,7 +845,8 @@ void WinCOFFObjectWriter::WriteObject(MC
>
>    Header.PointerToSymbolTable = offset;
>
> -  Header.TimeDateStamp = sys::TimeValue::now().toEpochTime();
> +  // We want a deterministic output. It looks like GUN as also writes 0
> in here.
>

GNU?

-- Sean Silva


> +  Header.TimeDateStamp = 0;
>
>    // Write it all to disk...
>    WriteFileHeader(Header);
>
> Added: llvm/trunk/test/MC/COFF/timestamp.s
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/COFF/timestamp.s?rev=196341&view=auto
>
> ==============================================================================
> --- llvm/trunk/test/MC/COFF/timestamp.s (added)
> +++ llvm/trunk/test/MC/COFF/timestamp.s Tue Dec  3 20:02:55 2013
> @@ -0,0 +1,4 @@
> +// RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s -o - |
> llvm-readobj -h | FileCheck %s
> +
> +// CHECK: ImageFileHeader {
> +// CHECK:   TimeDateStamp: {{.*}} (0x0)
>
>
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