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| author | Andreas Abel <andreas.abel@ifi.lmu.de> | 2022-01-27 15:14:11 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-01-27 18:34:54 -0500 |
| commit | f75411e84d09998f80a3a37869b2eff28864349a (patch) | |
| tree | 5e8996d310bb41ffa61475240746daf2e7d4be8b | |
| parent | 7a8547432505dbf080b0f7b57c5e660f50810cf1 (diff) | |
| download | haskell-f75411e84d09998f80a3a37869b2eff28864349a.tar.gz | |
Re #18087 user's guide: add a note that -Wxxx used to be -fwarn-xxx
The warning option syntax -W was introduced in GHC 8.
The note should clarify what e.g. "since 7.6" means in connection with
"-Wxxx": That "-fwarn-xxx" was introduced in 7.6.1.
[ci skip]
| -rw-r--r-- | docs/users_guide/using-warnings.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/users_guide/using-warnings.rst b/docs/users_guide/using-warnings.rst index 7f72b3eb20..3a2b4d5c84 100644 --- a/docs/users_guide/using-warnings.rst +++ b/docs/users_guide/using-warnings.rst @@ -14,6 +14,13 @@ of warnings. To turn off an individual warning ``-W<wflag>``, use ``-Wno-<wflag>``. To reverse ``-Werror``, which makes all warnings into errors, use ``-Wwarn``. +.. note:: + In GHC < 8 the syntax for ``-W<wflag>`` was ``-fwarn-<wflag>`` + (e.g. ``-fwarn-incomplete-patterns``). + This spelling is deprecated, but still accepted for backwards compatibility. + Likewise, ``-Wno-<wflag>`` used to be ``fno-warn-<wflag>`` + (e.g. ``-fno-warn-incomplete-patterns``). + .. ghc-flag:: -Wdefault :shortdesc: enable default flags |