#7062: Spurious undefined reference to `openpty'
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Reporter: simonmar | Owner:
Type: bug | Status: merge
Priority: high | Milestone: 7.4.3
Component: Compiler | Version: 7.4.2
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by nus):
Replying to [comment:7 simonmar]:
> I still don't understand what was going wrong, and I'm afraid your
explanation doesn't clarify things for me. The problem I encountered is
that we had a link line like
>
{{{
... -lHSprocess -lHSunix -lutil ...
}}}
>
> where `libHSprocess` depends on `libHSunix` which depends on `1libutil`.
But the linker reported a missing symbol `openpty` that is undefined in
`libHSunix` and defined in `libutil`.
The sequence is
{{{ ... -lHSprocess -lHSdirectory -lHSunix -lutil ... }}}
Both 'HSprocess' and 'HSdirectory' depend on 'HSunix' which has 'openpty'
undefined. With '--as-needed' only the first encounter of undefined
'openpty' gets satisfied from libutil.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7062#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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