[Bf-committers] Windows lib changes

[Ray Molenkamp]

So... that broke the windows build bot, if anyone with access
to the windows bot could check out the libs that be great!
 
 --Ray

On 2019-11-08 9:02 a.m., Ray Molenkamp wrote:
> All,
>
> Since the beginning of time we have always used a
> weird mix of using the static C runtime for some
> parts of blender while using the dynamic runtime
> for others.
>
> No-one exactly remembers how this came to be, but
> what was clear that mixing runtimes is 'not great'
> and that it eventually would cause issues, which
> it recently did [1]
>
> Today I'm cleaning it up and switching blender
> over to the dynamic runtime on windows.
>
> Now sadly this requires a whole new library set
> so if you are building blender on windows you may
> have some hiccups and unfortunately a large download.
>
> Ideally you'd run 'make update' *twice* and it will
> sort it self out. (Once to get the updated make.bat
> that knows about the new libs, and a second time to
> actually grab them)
>
> However there are some side cases where people
> did not follow our building guide and/or systems
> where cmake just behaved oddly, so here is a list of
> oddities you may run into and how to resolve them.
>
> 1) I get a build error along the lines of:
>
> Windows requires pre-compiled libs at: 'c:/blender-git/blender/../lib/win64_vc15'.
> Please run make update in the blender source folder to obtain them.
>
> Solution:
>
> Do what it says, if "make update" does not work for you, see 2
>
> 2) I checked out the libraries my self, I don't have SVN
> in my path and/or "make update" does not work for me.
>
> It happens, not everybody is following our building
> instructions [2] for various reasons, and some environments
> just don't seem to play nice with our scripts.
>
> Solution:
>
> You can check out the new set of libraries manually from
>
> https://svn.blender.org/svnroot/bf-blender/trunk/lib/win64_vc15
>
> just make sure they and up in the next to the win64_vc14 folder
> you currently have and it should work.
>
> 3) I have a linker error mentioning a RuntimeLibrary mismatch
>
> These generally come in the form of:
>
> 'RuntimeLibrary': value 'MTd_StaticRelease' doesn't match value 'MDd_DynamicRelease' in [somefile]
>
> This seems to be coming from CMake not always picking
> up on changes in the platform settings.
>
> Solution:
>
> Remove your build folder and start a fresh build
>
> 4) MSVC 2015
>
> MSVC2015 has been superseded by 2 newer versions both
> available for free, 2015 support will be dialed back
> to the same level as 32 bit support. We don't test it
> nor supply libraries for it anymore, however if you
> have your own set of libraries and have patches that
> help with vs2015 specific issues you are always
> welcome to submit those.
>
> Solution: Update to vs2017 or vs2019
>
> 5) I have a branch that has not merged this change yet.
>
> That's OK, the static vc14 libraries will be available
> for some time. However no further updates will be done
> to them.
>
> Special acknowledgments:
>
> Thanks to @Harleya and @deadpin on chat for helping test
> so we could have an as smooth as possible transition to
> the new libs.
>
> [1] https://developer.blender.org/D5387#122165
> [2] https://wiki.blender.org/wiki/Building_Blender/Windows
>
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