Marc Espie wrote: > reorganizing a large part of usr.bin or usr.sbin to just be one > single variation of bsd.prog.mk with multiple progs and multiple object > files... works just fine for, say 95% of the binaries in those directories > > (considering there are lots of directories with one single C file or two > C files, this sounds like a gain for make -jN, right ?) > > End result: no measurable gain. That on 4 cpu boxes at the time. > There are SMP issues to solve before this actually yields any > useful result...
I don't know. I wrote a lua script that unrolled all the subdir and ran a single process make in each directory, up to 4 at a time, and got pretty good results. It takes 30s on my newer laptop just to run unbound configure. Nothing else is compiling during that time, and it can be. Just a few of those can shave minutes off a build. (This was before clang. The savings is somewhat diminished by the total time consumed by the gnu directory.)
