On 2006-7-11 10:20 UTC, Colm Aengus Murphy wrote: > > We are using Paul Smith's "Advanced Auto-Dependancy Generation" > (http://make.paulandlesley.org/autodep.html) to great effect. > However as the number of source files increase make slows down. > The reason is that when you launch make it reads in an make file for > each source file. This can take some time. > Then it tried to update them. > I have added a rule to speed up its decision to remake them but it still > slows make down.
What rule did you add? I'm using -include *.d *.d:: ; but I don't think I ever actually looked into whether the double-colon rule has any real effect, so I'd be glad to learn the "right" way to do this. > Is there any way to disable the updating of makefiles altogether ? > > Has anyone else solved the scaleability issue with having a make file > for each source file ? > > The speed issue is most apparent on windows when make can take 20 > seconds before it even begins to check if it needs to update any object > files. I don't see anything like a twenty-second overhead on the msw platform, but I only have a few hundred source files. Do you have more than that? My '.d' files average about 20K each; are yours larger? If you're using '-MD' instead of '-MMD' with gcc tools to generate the dependency files, that might make things a lot slower. > We are already running with make -R to avoid make trying its own builtin > rules (as an aside this option doesn't work in a MAKEFLAGS variable for > some reason). The manual says: | You can also set MAKEFLAGS in a makefile, to specify additional flags | that should also be in effect for that makefile. Can you post a testcase that shows that to be incorrect? _______________________________________________ Help-make mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-make
