Re: [eigen] Help to compile/run unit tests for next 3.3.5 release

[Edward Lam <edward@xxxxxxxxxx>]

I finally noticed that cmake was using the 32-bit cross compiler for 64-bit for 
some reason even though I explicitly started the x64 Native Tools Command 
Prompt. And then it looked like even using /MP4 didn't actually parallelize the 
build because we're mostly building just 1 file per test executable.

Instead of trying to figure out how to get ctest to invoke msbuild with the 
right parallelization option, I just went with the ninja generator instead. eg.
- Ensure ninja.exe is in the PATH (https://ninja-build.org/)
- cd eigen-3.3
- mkdir build
- cd build
- cmake -G Ninja ..
- ctest -D Experimental -j

That built in a few minutes(!) whereas before, I never managed to finish 
building the tests in over 7 hours. The Ninja generator detected to use the 
native x64 compiler (in the same command prompt window).

It's now been running about 2.5 hours and I'm test 285/772 now. So hopefully 
it'll finish running the benchmark in another few hours.

-Edward

On 12/16/2017 7:15 PM, Bill Greene wrote:
> I am also running the tests on 64-bit VS2017. My system is significantly slower 
> than yours and it took
> over 16 hours to complete the tests.
>
> On Sat, Dec 16, 2017 at 4:21 PM, Edward Lam <edward@xxxxxxxxxx 
> <mailto:edward@xxxxxxxxxx>> wrote:
>
>     It's doesn't seem to be work for me on VS2017 though. I let it run for over
>     7 hours and it still hasn't finished on my i7-6850K 4.6 GHz with 64 MB of
>     RAM, 6 cores, 12 threads on Windows 7. I've attached my build log, which was
>     invoked from the native 64-bit VS2017 cmd shell and generated using the
>     windows versino of cmake 3.7.2.
>
>     -Edward
>
>     On 12/15/2017 11:59 AM, Gael Guennebaud wrote:
>
>
>
>         On Fri, Dec 15, 2017 at 9:54 AM, Gael Guennebaud
>         <gael.guennebaud@xxxxxxxxx <mailto:gael.guennebaud@xxxxxxxxx>
>         <mailto:gael.guennebaud@xxxxxxxxx <mailto:gael.guennebaud@xxxxxxxxx>>>
>         wrote:
>
>              [...]
>              ctest -C Release -D Experimental
>
>
>         there is small issue, the last line should be:
>
>         ctest -D Experimental
>
>         For the record, the build is green for msvc 11 (2012), it would still be
>         welcome to get feedback for MSVC 2015 and 2017.
>
>         gael