mold - a faster drop-in replacement for existing Unix linkers

It is several times faster than the LLVM lld linker, the
second-fastest open-source linker which was created by the same author
a few years ago.  mold is designed to increase developer productivity by
reducing build time, especially in rapid debug-edit-rebuild cycles.

Build options:
 - TARGETS: values={target1;target2;...}, default={empty} (all targets)
   Upstream discourages not building all targets, but provides this
   option for anybody wanting to reduce build time.  List of targets as
   of v2.41.0:
     X86_64, I386, ARM64LE, ARM64BE, ARM32LE, ARM32BE, RV32LE, RV32BE,
     RV64LE, RV64BE, PPC32, PPC64V1, PPC64V2, S390X, SPARC64, M68K,
     SH4LE, SH4BE, LOONGARCH32, LOONGARCH64