Re: Build error: math library not linked

On Monday 14 March 2011, Federico Di Gregorio wrote:
> On 13/03/11 23:21, P. Christeas wrote:
> > I upgraded to mageia α2, which uses python2.7 . Trying to build psycopg2
> > again for it, stumbled accross unresolved errors for the floating point
> > functions. Indeed, final linking step didn't include "-lm" to the
> > linker.
> >
> > Added it with commit 4e29da5cda6aa3, as found at:
> > http://members.hellug.gr/xrg/repos/psycopg2
> > (browse at http://git.hellug.gr/?p=xrg/psycopg2)
> >
> > Please check your platforms. Is libm already linked against? Could you
> > forecast any side-effect from explicitly mentioning it (as in the patch)
> > ?
>
> On my Linux box libm is not linked in and I don't have any problem. Can
> you please tell us you system version and the exact errors?
>
> federico

Do you use -Wl,no-undefined at the linker? My problem is at that step, and I
highly suspect that if I hadn't had that, the binary (psycopg.so) would still
run against the python binary (because python will load libm anyway).

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