Create a simple Vagrant role for the BCmath extension.
The repository and issue tracker for BCmath is at Github: jeblad/BCmath (issues)
Extension page at mw:Extension:BCmath
Change 538243 had a related patch set uploaded (by John Erling Blad; owner: John Erling Blad):
[mediawiki/vagrant@master] Added a Vagrant role for Expect extension
Pretty similar to T232511: Create a Vagrant role for Expect, both should be reviewed at the same time.
Change 538243 merged by jenkins-bot:
[mediawiki/vagrant@master] Added a Vagrant role for BCmath extension
Verified. Only has the known 16 failures.