llvm dev - Aug 2015 - Removing the timestamp

Linking a program with llvm and using the -version commandline option gets
output similar to the following:

LLVM (http://llvm.org/):
  LLVM version 3.7.0
  DEBUG build with assertions.
  Built Aug 10 2015 (04:08:22).
  Default target: x86_64-pc-windows-msvc
  Host CPU: sandybridge

I want to remove the time stamp on the fourth line as a step towards
reproducible builds. The relevant code fragment seems to be

#if (ENABLE_TIMESTAMPS == 1)
       << "  Built " << __DATE__ << " ("
<< __TIME__ << ").\n"
#endif

so ENABLE_TIMESTAMPS needs to be set to 0 or undefined. Presumably this
needs to be done during cmake, maybe as a command line parameter to same?
I've tried "-DCMAKE_CXX_FLAGS=-DENABLE_TIMESTAMPS=0" but it
doesn't make
any difference. What is the command I should be using for this?
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Hi,

On Mon, Aug 10, 2015 at 11:24 AM, Russell Wallace via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Linking a program with llvm and using the -version commandline option gets
> output similar to the following:
>
> LLVM (http://llvm.org/):
>   LLVM version 3.7.0
>   DEBUG build with assertions.
>   Built Aug 10 2015 (04:08:22).
>   Default target: x86_64-pc-windows-msvc
>   Host CPU: sandybridge
>
> I want to remove the time stamp on the fourth line as a step towards
> reproducible builds. The relevant code fragment seems to be
>
> #if (ENABLE_TIMESTAMPS == 1)
>        << "  Built " << __DATE__ << "
(" << __TIME__ << ").\n"
> #endif
>
> so ENABLE_TIMESTAMPS needs to be set to 0 or undefined. Presumably this
> needs to be done during cmake, maybe as a command line parameter to same?
> I've tried "-DCMAKE_CXX_FLAGS=-DENABLE_TIMESTAMPS=0" but it
doesn't make any
> difference. What is the command I should be using for this?
Use -DLLVM_ENABLE_TIMESTAMPS=OFF instead.

ismail