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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/using-warnings.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/users_guide/using-warnings.rst b/docs/users_guide/using-warnings.rst index 24f8039451..3f24f6a6dc 100644 --- a/docs/users_guide/using-warnings.rst +++ b/docs/users_guide/using-warnings.rst @@ -102,6 +102,15 @@ The following flags are simple ways to select standard "packages" of warnings: Warnings are treated only as warnings, not as errors. This is the default, but can be useful to negate a :ghc-flag:`-Werror` flag. +When a warning is emitted, the specific warning flag which controls +it, as well as the group it belongs to, are shown. + +.. ghc-flag:: -fshow-warning-groups + + Name the group a warning flag belongs to. + + This is enabled by default. Disable with ``-fno-show-warning-groups``. + The full set of warning options is described below. To turn off any warning, simply give the corresponding ``-Wno-...`` option on the command line. For backwards compatibility with GHC versions prior to 8.0, |