[Elftoolchain-developers] elftoolchain ld patches

[BwackNinja <bwa...@gm...>]

Hi,

I've been watching the project, and trying out elftoolchain's linker,
though I'm running it on Linux. It looks like it mostly works.

I've gotten it to link a working musl libc. That involved changing it
to link as a dynamic executable despite not linking to any shared
libraries, as well as some small fixes. The one thing I'm unsure about
here is the change I made to ld_reloc.c. It makes a working musl libc,
but I got to that point by looking at the symbols musl was segfaulting
on when loading itself and the output differences in readelf between
musl linked with binutils and elftoolchain.

I've also gotten it to link a working
llvm/clang/lld/libc++/libc++abi/libunwind as well. That was mostly
dealing with some peculiarities of musl (empty libm.a, etc), falling
back to parsing a file as a linker script when the it isn't detected
as a library (for linking with libc++, because libc++.so is a linker
script), and dealing with archive files being referenced multiple
times on the command line, resulting in duplicate symbols. I also had
to disable llvm's version scripts passed to the linker when compiling
it, which were causing ld to segfault. I haven't looked into that much
yet.

Patches attached.

~ BwackNinja