[lit] Passthrough CLANG_MODULE_CACHE_PATH env var
authorAlex Brachet <abrachet@google.com>
Sat, 11 Jun 2022 21:04:02 +0000 (21:04 +0000)
committerAlex Brachet <abrachet@google.com>
Sat, 11 Jun 2022 21:04:02 +0000 (21:04 +0000)
commit6466c9abf3674bade1f6ee859f24ebc7aaf9cd88
tree220e789b216bb2b1cc3fb91e33701957f0480a4c
parentcf5c63d187f4e8e2b1855c2c37fbc79d47852ec8
[lit] Passthrough CLANG_MODULE_CACHE_PATH env var

This environment variable can be set to control module
caching. It disables caching by setting the variable
empty. As such, it needs to be handled differently
from other environment variables here which are
assumed to not be empty.
llvm/utils/lit/lit/TestingConfig.py