> On March 13, 2018, 5:21 p.m., Jeff Coffler wrote:
> > 3rdparty/boost-1.65.0.patch
> > Lines 12 (patched)
> > <https://reviews.apache.org/r/66046/diff/1/?file=1974924#file1974924line12>
> >
> >     I'm thinking the other way around. That is, if the compiler version < 
> > 1910, issue the warning, otherwise be quiet.
> >     
> >     That way:
> >     
> >     1. We only update this when we update minimum compiler version,
> >     2. Greater versions are legal, as long as it's >= the minimum compiler 
> > version.
> >     
> >     The way you have it now, we'd need to update this every single time a 
> > new compiler came out. Yuck. I think we only care if new compiler is 
> > REQUIRED for some reason.

That's not quite what's going on here. The upstream code is checking if 
`_MSC_VER > 1910`, that is, "is the compiler newer than what we've tested 
(1910)? If so, emit this warning." But we compile with, for instance, MSVC 1912 
(latest dot-update to VS).

But look closer, this is a new patch file _removing_ this code because the 
check is causing _way_ too many warnings. No, Boost, you did not break between 
1910 and 1912; stop warning us.


- Andrew


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On March 13, 2018, 3:30 p.m., Andrew Schwartzmeyer wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/66046/
> -----------------------------------------------------------
> 
> (Updated March 13, 2018, 3:30 p.m.)
> 
> 
> Review request for mesos, Akash Gupta, Benjamin Bannier, Jeff Coffler, John 
> Kordich, Joseph Wu, and Michael Park.
> 
> 
> Bugs: MESOS-8556
>     https://issues.apache.org/jira/browse/MESOS-8556
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> On Windows, Boost explicitly checks if it's being compiled with a
> compiler version they've tested. As we tend to update Visual Studio
> whenever a stable update is available, this leads to a Boost warning,
> "Unknown compiler version..." being emitted repeatedly (for every file
> which includes a Boost header).
> 
> If it were emitted once, we would leave it be, but because it's
> repeated hundreds of times, and is mostly harmless, we patch the build
> to remove the warning itself. Unfortunately, there is no compile-time
> option to disable the warning instead of a patch.
> 
> Note that it is not straight-forward to generate a patch file for
> Boost. The steps were: clone the Boost repo recursively, go the
> `libs/config` submodule, edit the `visualc.hpp` file, go to the
> `include` subdirectory, and use `git diff --relative` to generate the
> patch with the corrects paths expected for the extracted tarball.
> 
> 
> Diffs
> -----
> 
>   3rdparty/CMakeLists.txt 61dc788edf96ca6e8e3ee736eb232c0c118e6191 
>   3rdparty/boost-1.65.0.patch PRE-CREATION 
> 
> 
> Diff: https://reviews.apache.org/r/66046/diff/1/
> 
> 
> Testing
> -------
> 
> Built on Windows; no more warning.
> 
> 
> Thanks,
> 
> Andrew Schwartzmeyer
> 
>

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