On Thursday, 23 May 2019 at 15:05:15 UTC, rikki cattermole wrote: >> Should be as easy as >> >> dflags "--DRT-gcopt=gc:precise" >> >> right? > > That would be passed to dmd, not to the build executable upon > running. You mean wise versa, right? Now I understand, --DRT-gcopt=gc:precise is passed to the resulting binary...