Date: Sat, 13 Oct 2012 00:23:49 -0700 From: Isaac Dunham <idunham@...abit.com> To: musl@...ts.openwall.com Subject: Re: feature request: flag to disable math library build On Thu, 11 Oct 2012 19:28:58 -0400 Rich Felker <dalias@...ifal.cx> wrote: > On Thu, Oct 11, 2012 at 09:37:38PM +0200, Szabolcs Nagy wrote: > > these are the math functions used by other parts > > of libc (mostly float scan and print): > > > > M = \ <snip> > > so you need > > > > SRCS := $(SRCS) $(M:%=src/math/%.c) > > > > (not tested) > > Note that this breaks if any of the above functions ever depend on > other math functions or internal math modules, not to mention if the > set of math functions used by the other part of the library ever > changes. I'm generally opposed to this kind of feature switching > because it has huge maintenance cost keeping track of all possible > configurations and ensuring none of them are broken. I'd tend to consider src/math to be core components. And IIRC, src/complex built the last time I tried CVS pcc (but I could be misremembering!) However, C11 makes complex numbers optional, and there's currently no dependance on src/complex/ - would it make sense to allow /configure --disable-complex (via the filter-out rule)? What percent of the build time is that? -- Isaac Dunham <idunham@...abit.com>
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