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| author | Herbert Valerio Riedel <hvr@gnu.org> | 2019-02-16 22:08:46 +0100 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2019-02-20 14:46:47 -0500 |
| commit | bdc9680cc5fe36f09b263d886e8b4e99d5c84635 (patch) | |
| tree | 3254684b4a8e73c90c3334404febcae8e3905ea1 | |
| parent | a481b1991c5ec0c5ff80e05d0af8e1bac8876301 (diff) | |
| download | haskell-ghc-8.6-merges.tar.gz | |
Fix regression incorrectly advertising TH supportghc-8.6-merges
`--supported-languages` must only advertise language extensions
which are supported by the compiler in order for tooling such
as Cabal relying on this signalling not to behave incorrectly.
Fixes #16331
(cherry picked from commit db4372cda7f6c87e7ad26efe3fca4b3f7f527a48)
| -rw-r--r-- | compiler/main/DynFlags.hs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs index 95a7122a57..539132653e 100644 --- a/compiler/main/DynFlags.hs +++ b/compiler/main/DynFlags.hs @@ -4084,6 +4084,14 @@ supportedExtensions :: [String] supportedExtensions = concatMap toFlagSpecNamePair xFlags where toFlagSpecNamePair flg +#if !defined(GHCI) + -- IMPORTANT! Make sure that `ghc --supported-extensions` omits + -- "TemplateHaskell"/"QuasiQuotes" when it's known not to work out of the + -- box. See also GHC #11102 and #16331 for more details about + -- the rationale + | flagSpecFlag flg == LangExt.TemplateHaskell = [noName] + | flagSpecFlag flg == LangExt.QuasiQuotes = [noName] +#endif | otherwise = [name, noName] where noName = "No" ++ name |