Building libobjc2 on FreeBSD 9.1 with clang 3.2 using cmake fails

[Marcus Müller]

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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