Update #7874: Add test, fix changelog #7900
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This fix allows users to override the C/C++ compiler, either by passing --with-gcc to configure or adding -pgmc to ghc-options in their Cabal file. Tested manually with a project using C++ sources that require a more recent version of clang than the default install (macOS). Inspected the output of `Setup.hs build -v` to confirm that the correct arguments are being passed to GHC when compiling the C++ sources. Resolves: haskell#4439
This was referenced Jan 11, 2022
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This PR takes originall commit from #7874, rebases it on master, adds test and in another commit puts changelog entry in proper place (I hope I got it right). The original commit is not changed but |
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OK, thanks, I got confused. |
Mikolaj
approved these changes
Jan 11, 2022
Kleidukos
approved these changes
Jan 12, 2022
This was referenced Jan 12, 2022
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I have added test for #7874. It works by cabal package having a c file which will only compile if all the necessary defines are defined. I'm passing defines via various ways, including
cabal configure, fields of cabal file and test thatgccis overridden by passing a custom script which defines final macro without which the c file will not compile.The original patch seems to be working fine as without it the test doesn't pass. However, I noticed that the original patch only results in
cabalpassing-pgmcflag toghc, thus overriding the C compiler. However original issue #4439 also mentioned the intention to override linker, which should have resulted in-pgmlbeing passed to theghc, but this doesn't happen in the original patch.