Re: building libobjc2 fPIC issue and ccmake . effectiveness

[David Chisnall]

Hi,

On 29/05/2020 13:24, Riccardo Mottola wrote:
> Hi!
>
> I am trying to build libobjc2 on NetBSD
>
> Linking fails (standard system linker)
>
> [  0%] Linking C shared library libobjc.so
> /usr/bin/ld: /usr/lib/libsupc++.a(eh_globals.o): relocation

We shouldn't be linking libsupc++.a into libobjc.so.  It sounds as if 
NetBSD ships a separate C++ runtime library for static linking, but not 
for dynamic linking.  You can work around this by explicitly setting 
libstdc++ as your C++ runtime library in the libobjc2 cmake config.

The correct fix it so tweak the C++ runtime library check in CMake so 
that it looks only for dynamic libraries.

David