[Haskell] Using -main-is with GHC 6.4/Windows
gk at ninebynine.org
Fri Mar 18 05:38:38 EST 2005
At 09:29 18/03/05 +0000, Simon Peyton-Jones wrote:
>[Redirecting to GHC users, which is where GHC-specific questions belong]
OK (but I'm not subscribed to that list, so pls copy me on any further
comment, if any.)
>| OK, it's not so bad. If I delete the AffyDataCalc.o file before
>| AffyDataCalcTest, it all works fine.
>| Hmmm... is there something the GHC --make feature can do to force
>| recompilation of the other modules previously compiled as main
>| modules? Just a thought.
>We're always wary of adding too much magic!
I can appreciate that. It did strike me as a little strange (magic, even?)
that the result of compiling a module named explicitly on the GHC command
line is different from the implicit compilation performed when chasing
imports. (I think I understand *why* it happens, but it still seems a
little strange.) By way of exploring the issue, rather than actually
asking for any of the following to be done, some thoughts I had are:
(a) generate the program initialization/finalization entry points in a
separate .o file from the compiled module, and include that in the link.
(b) use a different output filename (e.g. module_main.o) when compiling a
module as a program entry point.
(c) combination of (a) and (b) - compile base module as non-main, and a
separate output file for the program startup magic with a name based on but
different from the corresponding source module.
>I'll add a note to the
>-main-is documentation though.
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