Opt documentation bots out of toolchain check

[jfb]

Summary

Documentation bot clang-tools-sphinx-docs is failing when I commit D57264 because the GCC version it uses is too old (it's on 4.9.2). This doesn't really matter for now, but really you should update it. Work around the issue for now with the cmake opt-out flag, and let bot maintainers update their toolchain asynchronously.

[jfb]

I'll commit this now and see if the bots do what I expect. If so it'll unblock D57264. Bot maintainers still need to update their toolchains! We'll deprecated them eventually, and then the bots will break for real.

[jfb]

Looking at:
http://lab.llvm.org:8011/builders/clang-tools-sphinx-docs
Seems this change hasn't gotten picked up yet. I assume we need to re-sync that bot with the zorg repo?

[jfb]

In D57564#1380084, @jfb wrote:

Looking at:
http://lab.llvm.org:8011/builders/clang-tools-sphinx-docs
Seems this change hasn't gotten picked up yet. I assume we need to re-sync that bot with the zorg repo?

The reboot did the trick, the bot now has the flag.

zorg/buildbot/builders/SphinxDocsBuilder.py

if libunwind_html:
                       workdir=libunwind_srcdir))
 
     # Use CMake to configure
     cmakeCommand = [ "cmake",
                      WithProperties('%s/' + llvm_srcdir, 'workdir'),
                      '-G', 'Ninja',
                      '-DLLVM_ENABLE_SPHINX:BOOL=ON',
                      '-DSPHINX_OUTPUT_HTML:BOOL=ON',
-                     '-DSPHINX_OUTPUT_MAN:BOOL=ON'
+                     '-DSPHINX_OUTPUT_MAN:BOOL=ON',
+                     '-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON',
                    ]
     f.addStep(ShellCommand(name="cmake-configure",
                                command=cmakeCommand,
                                description=["cmake configure"],
                                workdir=llvm_objdir))
 
     if llvm_html:
         f.addStep(NinjaCommand(name="docs-llvm-html",