Date: Tue, 6 Apr 2004 20:26:00 +0200 From: Jens Schweikhardt <schweikh@schweikhardt.net> To: hackers@FreeBSD.org Subject: make(1) guru question Message-ID: <20040406182600.GA3907@schweikhardt.net>
next in thread | raw e-mail | index | archive | help
Fellow hackers, suppose you have a long list of files in a make variable V, exceeding kern.argmax. This means there is no way you can write a rule where $(V) is a command argument in any way shape or form. There is also no way to pass the value of V to xargs that I know of. For example with this Makefile: # Make V exceed kern.argmax (64K). V != jot 12440 all: @ echo $(V) This fails with echo:Argument list too long *** Error code 1 Furthermore the workaround of creating a process for each file in V with V != jot 12440 all: .for v in $(V) @ echo $(v) .endfor is not acceptable because it creates too much overhead for process creation (think of echo being an expensive command.) Question: is there any other way (short of increasing kern.argmax) to maybe divide and conquer the V contents by use of substitution magic? I'm thinking of something along repeatedly cramming N items in some variable and then calling echo less often. The original problem can be found in http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/52765 Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040406182600.GA3907>