Re: hat, ghc

On Thu, Sep 01, 2005 at 04:46:38PM +0100, Malcolm Wallace wrote:

Frederik Eaton writes:

...

Is there a way to use Hat with GHC, without 'hmake'?

You could transform each module in your project individually with hat-trans, before running ghc --make over the traced version. Unfortunately, this means you will need to find some other way to do the dependency analysis to ensure that modules are transformed in the right order. It is a known deficiency of the ghc --make implementation that it cannot handle pre-processors nicely - this applies equally to Happy, Alex, generic Haskell, etc.

One way would be to write a Makefile, with rules something like

$(patsubst %.hs, Hat/%.hs, ${SRCS}) : Hat/%.hs : %.hs hat-trans $< $(patsubst %.hs, Hat/%.o, ${SRCS}) : Hat/$.o : Hat/%.hs ghc -c -package hat $<

and then use ghc -M to generate the dependencies somehow.

OK, I might try that.

...

...

i.e., I'm not sure how 'hmake' found /usr/lib/ghc-6.2.2, but this directory is not mentioned in my environment, and it was not my intention to use this version of ghc.

You can select which version of ghc is used by hmake, either on the command-line, or by setting a default with hmake-config. e.g. hmake -hc=/home/frederik/.toast-i386/armed/bin/ghc ... or hmake-config list hmake-config add /home/frederik/.toast-i386/armed/bin/ghc hmake-config default /home/frederik/.toast-i386/armed/bin/ghc

By the way, can I make a request to have the hmake default be to use the environment? I have to have my environment correctly configured anyway, to get other things to work, and hmake isn't saving me any trouble by asking me to duplicate this information in a different form. Now, it appears to be looking for 'ghc-pkg' in the library directory of 'ghc' (rather, again, than in $PATH) $ hmake-config add /home/frederik/.toast-i386/armed/bin/ghc $ hmake-config default /home/frederik/.toast-i386/armed/bin/ghc $ hmake -ghc -hat pointtracker.hs sh: /home/frederik/.toast-i386/armed/lib/ghc-6.4.1.20050812/bin/ghc-pkg: No such file or directory Fail: user error (Command (/home/frederik/.toast-i386/armed/lib/ghc-6.4.1.20050812/bin/ghc-pkg -l) failed) Stop - hmake dependency error. [1]$ which ghc-pkg /home/frederik/.toast-i386/armed/bin/ghc-pkg Frederik -- http://ofb.net/~frederik/