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| author | Andreas Abel <andreas.abel@ifi.lmu.de> | 2022-01-27 15:14:11 +0100 |
|---|---|---|
| committer | Matthew Pickering <matthewtpickering@gmail.com> | 2022-02-10 13:55:37 +0000 |
| commit | 4a7de7df450df18a8495f8ff6f20827e7725d5ae (patch) | |
| tree | 561f2216031234c8c72eddf30167a1cce59537a9 /docs/users_guide | |
| parent | c7c890dc2384d255e80f849a5fdad9653ebc0bf4 (diff) | |
| download | haskell-4a7de7df450df18a8495f8ff6f20827e7725d5ae.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]
(cherry picked from commit f75411e84d09998f80a3a37869b2eff28864349a)
Diffstat (limited to 'docs/users_guide')
| -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 4f8879bcdf..7d686d3ac2 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 |