Re: FFI: calling Haskell from C++?

[Wolfgang Thaller]

we have tried long and hard to call Haskell functions from C++ using the FFI mechanism but without success.  Don't forget to say which platform you're on - the solution might be slightly platform-dependent.   $ ghc -fffi Foo.o Foo_stub.o main.cpp    main.o(.text+0x22): In function `main':   main.cpp: undefined reference to `__stginit_Foo()' #ifdef __GLASGOW_HASKELL__ extern void __stginit_Foo ( void ); #endif This should be... extern "C" void __stginit_Foo ( void );   main.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'   collect2: ld returned 1 exit status On Mac OS X, all you need to do is add -lstdc++ to your ghc command line; it may or may not be that easy on other platforms. Cheers, Wolfgang

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