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List:       freebsd-current
Subject:    Re: Is updating contrib/gcc desirable?
From:       Yuri <yuri () rawbw ! com>
Date:       2015-12-31 20:36:54
Message-ID: 568591E6.8030303 () rawbw ! com
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On 12/31/2015 04:15, David Chisnall wrote:
> The newer versions of GCC are GPLv3 and so are unacceptable for the FreeBSD base \
> system.  Most of libgcc in base now comes from compiler-rt.  The correct solution \
> would be to identify the missing functionality in compiler-rt so that it can be \
> fixed (with patches ideally, but even a list of the missing functions and what they \
> do would be helpful).  Things like libquadmath, which are only needed for the port, \
> belong in ports.

When I look which symbols clang++-compiled executables require from 
libgcc_s.so, list only has these symbols (mostly the first one):
_Unwind_Resume
_Unwind_DeleteException
_Unwind_GetCFA
_Unwind_RaiseException
_Unwind_SetGR
_Unwind_SetIP

I couldn't find any of them defined in compiler-rt. But it looks like 
libunwind project implements them: http://www.nongnu.org/libunwind/. 
There is also the port devel/libunwind. I am not sure if this means that 
libunwind should be imported into the base.

If only general C++ programs could be untangled from libgcc, this 
fortran problem will be solved.

Yuri

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