Duncan Coutts pushed to branch wip/dcoutts/windows-dlls at Glasgow Haskell Compiler / GHC

Commits:

• 0e08233b
  by Duncan Coutts at 2026-01-09T14:25:42+00:00

  Try using response files for hadrian linking with ghc.
  
  On windows, the link command line for ghc-internal is well over 32kb.
  We did not encounter this before for static libs, since we already use
  ar's @file feature (if available, which it is for the llvm toolchain).
  We encounter this now on windows for linking dll files (which uses ghc
  calling (l)ld rather than ar).
  

1 changed file:

• hadrian/src/Builder.hs

Changes:

                 Ghc FindHsDependencies _ -> do

                   runGhcWithResponse path buildArgs buildInputs

+                Ghc LinkHs _ -> do

+                  runGhcWithResponse path buildArgs buildInputs

+

                 HsCpp    -> captureStdout

                 Make dir -> cmd' buildOptions path ["-C", dir] buildArgs