On Fri, Jan 10, 2003 at 02:11:35PM +0100, Koen Claessen wrote:
The C++ stuff compiles fine (using Cygwin's g++). The Haskell stuff compiles just fine (using Win Ghc). However, at linking time I get the following error: - undefined reference to '_impure_ptr' - undefined reference to 'operator delete(void*)' - undefined reference to 'vtable for ___cxxabiv1::__blahblah' These are all things that C++ uses internally. I think the problem is that I used Cygwin's g++ compiler and that Ghc uses Mingwin's gcc compiler to compile and link.
It is possible to trick ghc into using cygwin's gcc in mingw-mode, the following steps works for me to do that: * compile the c++-stuff with g++ -mno-cygwin * copy /usr/bin/gcc.exe to c:/ghc/ghc-5.04.2/gcc.exe * rename c:/ghc/ghc-5.04.2/gcc-lib to something else (ghc feeds a -B option to gcc, which we cannot(?) override) * compile with "ghc -optl -mno-cygwin -lstdc++" (add -optc -mno-cygwin if -fvia-C is used) (i.e. we would like to use /usr/bin/gcc -mno-cygwin as the linker) I think it should be possible to use -pgml instead of replacing the binary, but that didn't work for me..
However, I have tried to recompile the C++ libraries using the Mingwin C++ compiler but it starts throwing pages of error messages at me.
However, the method above doesn't help if you really need cygwin for your c++-library, which you seem to do? /Peter