Date: Tue, 28 Nov 2017 21:40:12 +0100 From: altr@...2.de To: john-dev@...ts.openwall.com Subject: Re: Linux x86_64 Zitat von magnum <john.magnum@...hmail.com>: > On 2017-10-26 22:05, magnum wrote: >> On 2017-10-26 21:42, Solar Designer wrote: >>> magnum, we have this weird make rule: >>> >>> %.cl: | ../run/kernels >>> $(CP) $< ../run/kernels >>> >>> Do we really need it like that? I'm not familiar with that trick, and >>> couldn't easily find it in documentation - the '|' character isn't in >>> the index here: >>> >>> https://www.gnu.org/software/make/manual/html_node/Concept-Index.html#Concept-Index >> >> I can't even remember what it does... we need to figure that out >.< > > https://www.gnu.org/software/make/manual/html_node/Prerequisite-Types.html > > Without the pipe sign, a changed timestamp on ../run/kernels would > trigger an unwanted "rebuild" of the target (since a directory's > timestamp will change whenever a file is put there). We just need > ../run/kernels to exist at all. I've removed the both rules and it worked. ;) ==== opencl_%.h: | ../run/kernels $(CP) $< ../run/kernels %.cl: | ../run/kernels $(CP) $< ../run/kernels === Question: to what value expands $< in this context? ==> $(CP) $< $< Regards, Alexander
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