Hi, I have a Haskell project where a number of executables are produced from mostly the same modules. I'm using a Makefile to enable parallel builds. I received advice[1] that ghc -M is broken, but that there is parallel ghc --make in HEAD.
As far as I can tell, ghc --make does not allow building several
binaries in one run, so I think it may not still be a full replacement
for Makefiles.
However I have a question about ghc --make that is also relevant
without parallel ghc --make:
If I have two main modules, prog1.hs and prog2.hs, which have mutual
dependencies (for example, both import A from A.hs), is it safe to run
"ghc --make prog1" in parallel with "ghc --make prog2"? IOW, is there
some kind of locking to prevent both from building module A at the
same time and interfering with each other?
Is there a good way (either in current releases or HEAD) to build
multiple binaries partially from the same sources in parallel?
Sami
[1]
http://stackoverflow.com/questions/20938894/generating-correct-link-dependencies-for-ghc-and-makefile-style-builds
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