Updated version of the ld shipped by Apple
https://opensource.apple.com/ This formula is keg-only.

Current version

ld64 requires the following formulae to be installed:
cctools-headers 855 cctools headers via Apple
dyld-headers 360.18 Header files for the dynamic linker
libunwind-headers 35.3 C API for determining the call-chain of a program
openssl 1.0.2o_1 SSL/TLS cryptography library

Recent formula history

Mike McQuaid ld64: use *_by_macos.
FX Coudert ld64: remove pre-Leopard patch
Dominyk Tiller ld64: remove duped period from keg_only
Miguel Araújo ld64: fix audit
Mike McQuaid Use hash rockets again. (#5177)

Formula code at GitHub