diff options
Diffstat (limited to 'compiler/main/PackageConfig.hs')
| -rw-r--r-- | compiler/main/PackageConfig.hs | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/compiler/main/PackageConfig.hs b/compiler/main/PackageConfig.hs index d34d9e1f5c..514a2e004f 100644 --- a/compiler/main/PackageConfig.hs +++ b/compiler/main/PackageConfig.hs @@ -1,3 +1,5 @@ +{-# LANGUAGE CPP #-} + -- | -- Package configuration information: essentially the interface to Cabal, with -- some utilities @@ -45,16 +47,11 @@ defaultPackageConfig = emptyInstalledPackageInfo -- $package_naming -- #package_naming# --- Mostly the compiler deals in terms of 'PackageName's, which don't --- have the version suffix. This is so that we don't need to know the --- version for the @-package-name@ flag, or know the versions of --- wired-in packages like @base@ & @rts@. Versions are confined to the --- package sub-system. --- --- This means that in theory you could have multiple base packages installed --- (for example), and switch between them using @-package@\/@-hide-package@. --- --- A 'PackageId' is a string of the form @<pkg>-<version>@. +-- Mostly the compiler deals in terms of 'PackageId's, which have the +-- form @<pkg>-<version>@. You're expected to pass in the version for +-- the @-package-name@ flag. However, for wired-in packages like @base@ +-- & @rts@, we don't necessarily know what the version is, so these are +-- handled specially; see #wired_in_packages#. -- | Turn a Cabal 'PackageIdentifier' into a GHC 'PackageId' mkPackageId :: PackageIdentifier -> PackageId |