Add support for -exclude-libs

[theoparis]

This is currently required when building MLIR with wild set as the linker via --ld-path unless the cmake build files are patched. See https://github.com/llvm/llvm-project/blob/main/mlir/lib/ExecutionEngine/CMakeLists.txt#L212

Here's the cmake configure command that I used:

cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXE_LINKER_FLAGS="--ld-path=wild" -DCMAKE_SHARED_LINKER_FLAGS="--ld-path=wild" -DLLVM_ENABLE_ASSERTIONS=ON -DCLANG_ENABLE_CIR=ON -DCLANG_DEFAULT_LINKER=lld -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;mlir" -DLLVM_CCACHE_BUILD=ON -DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libunwind" -S llvm -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DLLVM_INCLUDE_TESTS=OFF

Also, -r (creating a relocatable object file) seems to be required for compiler-rt but I figured getting compiler-rt to link is less of a priority.

[davidlattimore]

Thanks for giving Wild a try and filing this issue. I've added support for --exclude-libs ALL. I haven't as yet added support for --exclude-libs with specific library names, however hopefully that shouldn't be a problem, since I'm guessing use of ALL is more common and appears to be what the file you linked is using.

-r sounds a good bit harder to implement. Let me know if you find yourself wanting it though and I'll give some thought as to how to implement it.

[karolzwolak]

I need the support for excluding symbols from a specific library.

Encountered it while trying to link intel/intel-graphics-compiler with wild.
This project depends on LLVM and LLD and we're using --exclude-libs to hide LLD symbols from our shared library.