This started with -r1800 "build: MIR_LINK_TIME_OPTIMIZATION option to use link time optimization".
I had definitely tried this configuration before proposing that MP, so this must be an interaction with something that landed around that time. :(
This started with -r1800 "build: MIR_LINK_ TIME_OPTIMIZATI ON option to use link time optimization".
I had definitely tried this configuration before proposing that MP, so this must be an interaction with something that landed around that time. :(