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Date: Sat, 13 Oct 2012 16:49:45 -0700
From: Isaac Dunham <>
Subject: Re: feature request: flag to disable math library build

On Sat, 13 Oct 2012 08:26:42 -0400
Rich Felker <> wrote:

> > And IIRC, src/complex built the last time I tried CVS pcc (but I
> > could be misremembering!)
> Nice to hear - I hope that's true!

Yes. pcc 20120923 used. 
The problems I'm running into are -m*:

echo 'int main(){ return 0; }' |pcc -march=i386 -
ld: unrecognised emulation mode: arch=i386
Supported emulations: elf_i386 i386linux elf_x86_64 elf_l1om
ld terminated with status 1
(I use -melf_i386, i386linux is not the right mode)

And a segfaulty loader.

> > 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)?

> There are plenty of other things in musl that are not required by the
> base standards, like GNU extensions, all of the XSI option, and
> various POSIX feature groups like spawn, but they're not made
> optional, because it increases complexity and has almost no benefits.

The potential issue is that complex/ requires a compiler capable of handling complex numbers, which C11 makes optional. Of course, it would be possible to just say that the compiler used to build musl must support complex numbers.

Isaac Dunham <>

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