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| author | Tamar Christina <tamar@zhox.com> | 2016-09-01 21:30:07 +0100 |
|---|---|---|
| committer | Tamar Christina <tamar@zhox.com> | 2016-09-01 21:31:52 +0100 |
| commit | e5ecb2010514405ac1b9b1285a8a65c00a5fd4e0 (patch) | |
| tree | 866ae612180fb7fab7af9281d8f43980ec6718e1 /docs | |
| parent | f233f00b1915ac6c0a200b8017a9f07deefd401e (diff) | |
| download | haskell-e5ecb2010514405ac1b9b1285a8a65c00a5fd4e0.tar.gz | |
Added support for deprecated POSIX functions on Windows.
Summary:
With the introduction of 8.0.1 We've stopped supporting in GHCi
the use of POSIX functions under their deprecated names on Windows.
This to be compatible with object and libraries from the most
popular compilers on the platform (Microsoft and Intel compilers).
However this brings a confusing disparity between the compiled and
interpreted behavior since MingW-W64 does support the deprecated names.
Also It seems clear that package writers won't update their packages to
properly support Windows. As such I have added redirects in the RTS
for the deprecated functions as listed on
https://msdn.microsoft.com/en-us/library/ms235384.aspx.
This won't export the functions (as in, they won't be in the symbol table
of compiled code for the RTS.) but we inject them into the symbol table
of the dynamic linker at startup.
Test Plan:
./validate
and
make test TEST="ffi017 ffi021"
Reviewers: thomie, simonmar, RyanGlScott, bgamari, austin, hvr, erikd
Reviewed By: simonmar, bgamari
Subscribers: RyanGlScott, #ghc_windows_task_force
Differential Revision: https://phabricator.haskell.org/D2500
GHC Trac Issues: #12209, #12497, #12496
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/8.0.2-notes.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/docs/users_guide/8.0.2-notes.rst b/docs/users_guide/8.0.2-notes.rst index 09ba5720a5..66cbe31c81 100644 --- a/docs/users_guide/8.0.2-notes.rst +++ b/docs/users_guide/8.0.2-notes.rst @@ -33,6 +33,16 @@ Compiler initial cmm from STG-to-C-- code generation and :ghc-flag:`-ddump-cmm-verbose` to obtain the intermediates from all C-- pipeline stages. +Runtime system +~~~~~~~~~~~~~~ + +- The Runtime linker on Windows is once again recognizing POSIX functions under their + "deprecated" name. e.g. "strdup" will now be recognizes and internally forwarded to "_strdup". + If you have existing code already using the correct names (e.g. _strdup) then this will just continue + to work and no change is needed. For more information about how the forwarding is done please see + `MSDN <https://msdn.microsoft.com/en-us/library/ms235384.aspx>`_ . This should now introduce the same behavior + both compiled and interpreted. (see :ghc-ticket:`12497`). + - Added :ghc-flag:`-fdefer-out-of-scope-variables`, which converts variable out of scope variables errors into warnings. |