Fixes error seen in Homebrew/homebrew-core#138452.
`DevelopmentTools.default_compiler` can return a `Symbol` like `:clang`.
Make sure its result can be fed to `DevelopmentTools.locate`.
Signed-off-by: Ruoyu Zhong <zhongruoyu@outlook.com>
Right now this is done through the gcc@5 formula.
See 9692318ca6/Formula/gcc%405.rb (L33)
This is fragile because when we will migrate to gcc@11
we have to think about migrating the installation from one gcc formula to another..
Also, not having the right glibc version results in a non-functional brew
installation on an older Linux: the glibc installation needs
to be done by brew, and not by a workaround in a specific formula
Co-Authored-By: Mike McQuaid <mike@mikemcquaid.com>
Co-Authored-By: Bo Anderson <mail@boanderson.me>
Co-Authored-By: Shaun Jackman <sjackman@gmail.com>
