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| author | David Feuer <david.feuer@gmail.com> | 2017-12-11 13:03:52 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2017-12-11 13:03:53 -0500 |
| commit | 708ed9ca4dbf372817fe84a2fe486940123bddfb (patch) | |
| tree | 30d67b789552b9f017674d4e9f2b6341cc75eede /docs/users_guide/8.4.1-notes.rst | |
| parent | cafe98345cb5d4b11f2059d60d2f20e976ef4f2a (diff) | |
| download | haskell-708ed9ca4dbf372817fe84a2fe486940123bddfb.tar.gz | |
Allow users to ignore optimization changes
* Add a new flag, `-fignore-optim-changes`, allowing them to avoid
recompilation if the only changes are to the `-O` level or to
flags controlling optimizations.
* When `-fignore-optim-changes` is *off*, recompile when optimization
flags (e.g., `-fno-full-laziness`) change. Previously, we ignored
these unconditionally when deciding whether to recompile a module.
Reviewers: austin, bgamari, simonmar
Reviewed By: simonmar
Subscribers: duog, carter, simonmar, rwbarton, thomie
GHC Trac Issues: #13604
Differential Revision: https://phabricator.haskell.org/D4123
Diffstat (limited to 'docs/users_guide/8.4.1-notes.rst')
| -rw-r--r-- | docs/users_guide/8.4.1-notes.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/users_guide/8.4.1-notes.rst b/docs/users_guide/8.4.1-notes.rst index 7d6cfddce6..246a278579 100644 --- a/docs/users_guide/8.4.1-notes.rst +++ b/docs/users_guide/8.4.1-notes.rst @@ -256,6 +256,12 @@ Compiler - Lots of other bugs. See `Trac <https://ghc.haskell.org/trac/ghc/query?status=closed&milestone=8.4.1&col=id&col=summary&col=status&col=type&col=priority&col=milestone&col=component&order=priority>`_ for a complete list. +- New flags :ghc-flag:`-fignore-optim-changes` and + :ghc-flag:`-fignore-hpc-changes` allow GHC to reuse previously compiled + modules even if they were compiled with different optimisation or HPC + flags. These options are enabled by default by :ghc-flag:`--interactive`. + See :ghc-ticket:`13604` + Runtime system ~~~~~~~~~~~~~~ |