#3333: GHCi doesn't load weak symbols
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Reporter: heatsink | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.14.1
Component: GHCi | Version: 6.10.4
Keywords: weak, dynamic loading | Difficulty: Unknown
Os: Linux | Testcase:
Architecture: x86 | Failure: None/Unknown
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Description changed by heatsink:
Old description:
> GHCi fails to load modules with weak symbols. The compiler, in contrast,
> has no trouble with them. The attached Cabal package demonstrates the
> problem. After building and installing:
>
> {{{
> :Prelude> :m +WeakTest
> Prelude WeakTest> weak_test 0
> Loading package WeakTest-0 ... linking ... <interactive>:
> /home/cirodrig/.cabal/lib/WeakTest-0/ghc-6.10.3/HSWeakTest-0.o: unknown
> symbol `weak_test'
> }}}
>
> I encountered this problem while trying to build a package that contains
> C++ code. Because GCC generates weak symbols when compiling C++,
> libraries that contain C++ code will not work in GHCi. (Granted, this is
> not the only problem with mixing C++ and Haskell.)
New description:
GHCi fails to load modules with weak symbols. The compiler, in contrast,
has no trouble with them. The attached Cabal package demonstrates the
problem. After building and installing:
{{{
:Prelude> :m +WeakTest
Prelude WeakTest> weak_test 0
Loading package WeakTest-0 ... linking ... <interactive>:
/home/heatsink/.cabal/lib/WeakTest-0/ghc-6.10.3/HSWeakTest-0.o: unknown
symbol `weak_test'
}}}
I encountered this problem while trying to build a package that contains
C++ code. Because GCC generates weak symbols when compiling C++,
libraries that contain C++ code will not work in GHCi. (Granted, this is
not the only problem with mixing C++ and Haskell.)
--
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3333#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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