Add linker tools

Tasks

• lld can be easily added as it is already supported. We just need to add a CLI and actions option for it. It should be treated the same as clangtidy, etc.
• mold
• sold
• gold

Description

Hi,
I was using setup-cpp with project_options (in my docker build) and custemize the linker option, see find_linker.

Would be nice to install mold or one of the other (better) Linker, rather then (gcc) ld or gold.

Improving C++ Compilation Times: Tools & Techniques - Vittorio Romeo - ACCU 2023

So install (?) ...

• mold (e.g. when compiler is gcc)
• lld when compiler is llvm (default)
• sold for Mac OS
• windows: ???

npx setup-cpp --compiler gcc --linker mold --cmake true --ninja true --ccache true --vcpkg true

More Context

I was getting this Error: /usr/bin/ld.gold: separate-code: unknown -z option.

CMakeOptions.cmake

find_linker(PROJECT_OPTIONS_LINKER)
MESSAGE(STATUS "Use Linker: ${PROJECT_OPTIONS_LINKER}")

project_options(
  ...
  LINKER
  ${PROJECT_OPTIONS_LINKER})

Compiler found: /usr/bin/g++-13
Use Linker: gold

After that I just installed mold and everything works:

RUN apt-get update -qq && \
    # install nodejs
    apt-get install -y --no-install-recommends nodejs npm && \
    # install setup-cpp
    npm install -g setup-cpp@v0.41.0 && \
    # install the compiler and tools
    setup-cpp \
        --nala true \
        --compiler ${compiler} \
        --cmake true \
        --ninja true \
        --task true \
        --vcpkg true \
        --cppcheck true \
        --gcovr true \
        --doxygen true \
        --ccache true && \
    # install custom linker
    apt-get install -y --no-install-recommends mold && \
    # cleanup
    nala autoremove -y && \
    nala autopurge -y && \
    apt-get clean && \
    nala clean --lists && \
    rm -rf /var/lib/apt/lists/* && \
    rm -rf /tmp/*

Start by tracing the setup-cpp CLI and GitHub Actions option handling for compiler tools, comparing the existing clangtidy-style support mentioned in the task. Review the CMakeOptions.cmake and find_linker usage shown in the issue, then define installation and selection behavior for lld, mold, sold, and gold across the stated platforms. Done means the requested linker options can be selected through the CLI and actions configuration.