Commits on Nov 19, 2024

1. Use response files for ghc invocations …

   Before this change, `cabal` could fail with the following error message
   when building very large Haskell packages:
   
   ```
   ghc: createProcess: posix_spawnp: resource exhausted (Argument list too long)
   ```
   
   This is because when the number of modules or dependencies grows large
   enough, then the `ghc` command line can potentially exceed the
   `ARG_MAX` command line length limit.
   
   However, `ghc` supports response files in order to work around these
   sorts of command line length limitations, so this change enables the
   use of those response files.
   
   Note that this requires taking a special precaution to not pass RTS
   options to the response file because there's no way that `ghc` can
   support RTS options via the response file.  The reason why is because
   the Haskell runtime processes these options (not `ghc`), so if you
   store the RTS options in the response file then `ghc`'s command line
   parser won't know what to do with them.
   
   This means that `ghc` commands can still potentially fail if the RTS
   options get long enough, but this is less likely to occur in practice
   since RTS options tend to be significantly smaller than non-RTS
   options.
   
   This also requires skipping the response file if the first argument
   is `--interactive`.  See the corresponding code comment which explains
   why in more detail.
   
   Co-Authored-By: Gabriella Gonzales <[email protected]>

   

   9999years and Gabriella439 committed Nov 19, 2024
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