Re: [Qemu-devel] [PATCH v2] configure: properly check if -lrt and -lm is needed

[Natanael Copa]

On Mon, 20 Aug 2012 19:53:22 +0000
Blue Swirl <address@hidden> wrote:

> >>  - Do not remove the explicit add of -lm unless Haiku. This was due
> >>    to
> >> http://www.mail-archive.com/address@hidden/msg102965.html I
> >> am not sure if this is valid, though.
> >
> > Certainly building a linux-user target works for me even without
> > that explicit 'LIBS+=-lm' in Makefile.target. Blue, can you remember
> > what you had in mind when you wrote that email?
> 
> Build failed since math library functions (sin() etc.) were not found.

The v2 and v3 patches I sent tests for sin() in addition to isnan (which
normally is a macro). It might explain why it works now.

Adding a second -lm does not hurt, but omitting it when needed breaks
build on uclibc for sure, so it would be nice if the v3 patch could be
applied.

Thanks!

-nc