Re: Makefile for parser
От | Peter Eisentraut |
---|---|
Тема | Re: Makefile for parser |
Дата | |
Msg-id | Pine.LNX.4.21.0007021307110.351-100000@localhost.localdomain обсуждение исходный текст |
Ответ на | Re: Makefile for parser (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-hackers |
Tom Lane writes: > > On the topic of make, have you all read "Recursive Make Considered > > Harmful" at http://www.tip.net.au/~millerp/rmch/recu-make-cons-harm.html > > I read it, I don't believe a word of it. Not only do I believe some words of it, I've had essentially the same thoughts for quite a while. No, certainly there should not be a single makefile for all of PostgreSQL. I'd certainly like to be able to do `make -C src/bin/psql install'. But for the backend tree where you only build one program this certainly would make sense. And note that the author's example is essentially the same we've been talking about: a parse.h file with incomplete dependencies. > The whole thing is founded on a bogus example, to which is added > specious reasoning and an assumption that everyone wants to use GCC as > compiler Well, you would need a compiler that handles -c and -o at the same time, but you can always use cc -c && mv if that doesn't work. I think GNU make might even do that by default, but I'd have to check. > The Postgres build setup is certainly far from ideal, but IMHO the only > thing *really* wrong with it is that we're not constructing accurate > dependency lists by default. Accurate dependencies are one thing, actually knowing how to satisfy these dependencies is another. If the dependencies say that file X depends on fmgroids.h but no further information about fmgroids.h is provided then it will fail if it doesn't exist, or assume on mere existance that it is up to date. This is again exactly what this guy is talking about. Concluding, I don't know how well the suggested setup would work. I haven't tried it, but I certainly will. In any case there's got to be something better than maintaining 50+ makefiles that all do the same thing and all do the same thing wrong. -- Peter Eisentraut Sernanders väg 10:115 peter_e@gmx.net 75262 Uppsala http://yi.org/peter-e/ Sweden
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