Problems with 6.x compilers
marte at pms.informatik.uni-muenchen.de
Wed Nov 23 10:52:27 EST 2005
On Wed, 23 Nov 2005, Simon Marlow wrote:
> On 22 November 2005 17:18, Michael Marte wrote:
> > I am having some annoying problems with the 6.x compilers:
> > 6.4 and 6.4.1: When repeating a build (with ghc --make) all modules
> > are rebuild even if nothing has changed. With earlier compilers,
> > only linking takes place in this setting. Can I change this
> > behaviour? I cannot develop this way.
> Should not happen, if it does there is a bug. Can you tell us how to
> repeat the behaviour you're seeing? We aren't seeing any unecessary
> recompilation here.
Like Wolfram Kahl, I am using -ddump-minimal-imports.
I cannot check whether the use of this option causes the problem, because
I returned to 6.2 already to continue porting my project from ghc 5.
> > 6.2 and up: The object file is named after the module, not after the
> > source file as in 5.04. As there are several main modules in my
> > project, each in its own source file, all I get is a big mess. Any
> > suggestions?
> The object file is named after the source file, unless you use -odir.
> The behaviour is clearly specified in the user's guide:
> the behaviour has been through several revisions before we arrived at
> this, and I'm not keen to change it.
> You can have several Main modules in the same directory if you don't use
> -odir. If you do use -odir, then you need to use a different value for
> -odir for each different program. Alternatively use -main-is, as Bulat
> suggested (actually this is better, IMO).
I followed the suggestion of Bulat: I renamed the modules and used
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