#7311: -odir option changes .o and .hi names of main source file to Main.hi/o
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Reporter: slyfox | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: Compiler | Version: 7.6.1
Resolution: wontfix | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: None/Unknown | Difficulty: Unknown
Testcase: | Blockedby:
Blocking: | Related:
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Comment(by slyfox):
Replying to [comment:1 simonmar]:
> This is the intended behaviour, and it is documented:
[http://www.haskell.org/ghc/docs/latest/html/users_guide/separate-
compilation.html#output-files].
>
> Consider this:
>
> {{{
> $ ghc -odir out ../src/foo.hs
> }}}
>
> where do you want the object file to go?
>
> If you're using `-odir`, why not put the output files in separate
directories?
>
I'd expect it to be '''out/foo.{o,hi}''', or '''out/src/foo.{o,hi}'''
(whatever is used by other non-Main modules).
I see. It's a bit more complicated, than I thought.
My initial use case was like that:
{{{
-- layout: tool1.hs tool2.hs ToolModule{1..10}.hs
-- and both tools use those ToolModule{1..10}.hs
$ ghc --make -odir vanilla tool1.hs
$ ghc --make -odir vanilla tool2.hs
$ ghc --make -odir prof -prof tool1.hs
$ ghc --make -odir prof -prof tool2.hs
}}}
where both tools would reuse some (10) of common module depends.
Custom Makefile did consider all %.hs get translated to %.o and %.hi.
As I understand it might be incorrect to assume that ToolModule*.hi
won't change when compiled against different tool{1,2}.hs files
(if we lack type signatures in those modules they might be dependent on
tool{1,2}.hs users), but it's already the problem for standard case:
{{{
$ ghc --make tool1.hs
$ ghc --make tool2.hs
}}}
But that's a bit confusing to suddently change main file's name to Main.o
especially for '-odir .'
Thanks for the pointers!
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7311#comment:2>
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