Re: Building libobjc2 on FreeBSD 9.1 with clang 3.2 using cmake fails

[David Chisnall]

Hi Marcus,

I find that strange, as FreeBSD 9.1 is the platform where I develop libobjc2...

Can you give me the output from the cmake command?

libcxxrt shipped in 9.1 - I'm using it there (it's in /usr/src/lib/libcxxrt if 
it isn't installed by default, but I think it is).  I do have something in my 
libmap.conf telling everything that tries to use libsupc++ to use libcxxrt, but 
that's just for testing libcxxrt.

David

On 13 Mar 2013, at 14:42, Marcus Müller <address@hidden> wrote:

> Hi (David),
> 
> I'm trying to build libobjc2 on FreeBSD 9.1 with clang 3.2 using cmake, but 
> this fails miserably. What I did is this:
> 
> I checked out libobjc2 SVN r36340 (most recent at the time of writing). My 
> clang is clang version 3.2 (tags/RELEASE_32/final). So I did this:
> 
> $ mkdir Build; cd Build
> $ CC=clang CXX=clang++ cmake ..
> 
> This picked up clang 3.2 as expected. However, running make fails:
> [ 48%] Built target objc
> Linking C executable AllocatePair
> ../libobjc.so.4.6: undefined reference to `std::type_info::__is_pointer_p() 
> const'
> ../libobjc.so.4.6: undefined reference to `typeinfo for std::type_info'
> ../libobjc.so.4.6: undefined reference to `std::type_info::__is_function_p() 
> const'
> ../libobjc.so.4.6: undefined reference to 
> `std::type_info::__do_upcast(__cxxabiv1::__class_type_info const*, void**) 
> const'
> ../libobjc.so.4.6: undefined reference to `vtable for std::type_info'
> ../libobjc.so.4.6: undefined reference to `std::type_info::~type_info()'
> clang: error: linker command failed with exit code 1 (use -v to see 
> invocation)
> *** [Test/AllocatePair] Error code 1
> 
> Stop in /home/znek/Projects/GNUstep/libobjc2/Build.
> *** [Test/CMakeFiles/AllocatePair.dir/all] Error code 1
> 
> Stop in /home/znek/Projects/GNUstep/libobjc2/Build.
> *** [all] Error code 1
> 
> Stop in /home/znek/Projects/GNUstep/libobjc2/Build.
> 
> 
> Looking at ../CMakeLists.txt, this shouldn't happen, no?
> 
> $cat ../CMakeLists.txt
> […]
> find_library(CXX_RUNTIME cxxrt)
> # If it doesn't, then look for GNU libsupc++.so instead (either works, they're
> # ABI compatible).
> […]
> 
> I guess libcxxrt is FreeBSD 10 only?
> 
> 
> Cheers,
> 
>   Marcus
> 
> -- 
> Marcus Müller  .  .  .  http://www.mulle-kybernetik.com/znek/
> 
> 
> 
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