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Diffstat (limited to 'src/Environment.hs')
| -rw-r--r-- | src/Environment.hs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/Environment.hs b/src/Environment.hs new file mode 100644 index 0000000000..de43efa924 --- /dev/null +++ b/src/Environment.hs @@ -0,0 +1,16 @@ +module Environment (setupEnvironment) where + +import System.Environment + +-- | The build system invokes many external builders whose behaviour is +-- influenced by the environment variables. We need to modify some of them +-- for better robustness of the build system. +setupEnvironment :: IO () +setupEnvironment = do + -- ghc-cabal refuses to work when GHC_PACKAGE_PATH is set (e.g. by Stack) + unsetEnv "GHC_PACKAGE_PATH" + + -- in MinGW if PWD is set to a Windows "C:\\" style path then configure + -- `pwd` will return the Windows path, and then modifying $PATH will fail. + -- See https://github.com/snowleopard/hadrian/issues/189 for details. + unsetEnv "PWD" |