Hello everyone,
the examples are working now! John, Wolfgang and Rich, thank you for your help!
On Wed, 14 Sep 2005 02:07:52 +1000
skaller
On Tue, 2005-09-13 at 15:20 +0000, Felix Breuer wrote:
main.o(.text+0x22): In function `main': main.cpp: undefined reference to `__stginit_Foo()'
This was solved by extern "C" void __stginit_Foo(void);
main.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0' collect2: ld returned 1 exit status
and this by adding -lstdc++ to the ghc command line options. My platform is Linux 2.6.11 running GCC 3-4-4.. I will now try to apply this to my application. I will see if I run into trouble when I actually use C++ code (and not just rename a C source file).
There is one more problem: you MUST NOT run gcc on files ending in *.cpp. You are REQUIRED to run g++. So you will have to somehow tell ghc to use g++ and NOT gcc. in particular C++ programs require different startup code to C, to initialise exception handling, etc etc. So the whole program MUST be linked by g++, not gcc, and the main() must be compiled with g++ not gcc.
Is it possible to have ghc compile _and_ _link_ all the Haskell code, and then using g++ to compile the C++ code and link everything together? I tried using ghc to only compile the .hs files and have g++ do all the linking but I only got a bunch of undefined references due to the GHC libs not being linked into the executable. I always relied on ghc --make to figure out the dependencies here, and now I don't know which files to link against... Thanks again, Felix