This patch introduces enhancements to the Baremetal toolchain to support
GCC toolchain detection.
- If the --gcc-install-dir or --gcc-toolchain options are provided and
point to valid paths, the sysroot is derived from those locations.
- If not, the logic falls back to the existing sysroot inference
mechanism already present in the Baremetal toolchain.
- Support for adding include paths for the libstdc++ library has also
been added.
Additionally, the restriction to always use the integrated assembler has
been removed. With a valid GCC installation, the GNU assembler can now
be used as well.
This patch currently updates and adds tests for the ARM target only.
RISC-V-specific tests will be introduced in a later patch, once the
RISCVToolChain is fully merged into the Baremetal toolchain. At this
stage, there is no way to test the RISC-V target within this PR.
RFC:
https://discourse.llvm.org/t/merging-riscvtoolchain-and-baremetal-toolchains/75524
45ea46c446
