• Tamar Christina's avatar
    rts/linker: ignore unknown PE sections · a293925d
    Tamar Christina authored
    Summary: Currently the linker tries to see if it understands/knows every section in the PE file before it continues. If it encounters a section it doesn't know about it errors out. Every time there's a change in MinGW compiler that adds a new section to the PE file this will break the ghc linker. The new sections don't need to be understood by `ghc` to continue so instead of erroring out the section is just ignored. When running with `-debug` the sections that are ignored will be printed.
    
    Test Plan:
    See the file `ghcilinkerbug.zip` in #9907.
    
     1) unzip file content.
     2) open examplecpp.cabal and change base <4.8 to <4.9.
     3) execute cabal file with cabal repl.
    
    Applying the patch makes `cabal repl` in step 3) work.
    
    Note that the file will fail on a `___mingw_vprintf` not being found. This is because of the `cc-options` specifying `-std=c++0x`, which will also require `libmingwex.a` to be linked in but wasn't specified in the cabal file. To fix this, remove the `cc-options` which defaults to c99.
    
    Reviewers: austin
    
    Reviewed By: austin
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D671
    
    GHC Trac Issues: #9907, #7103, #10051, #7056, #8546
    a293925d
Linker.c 272 KB