Re: libtool / assembler problem with -DPIC

[Reini Urban <rurban at x-ray dot at>]

Charles Wilson schrieb:
> Gerrit P. Haase wrote:
> > With GNU as PIC is not an noop, when -DPIC is used to invoke gas the
> > generated assembly is broken.  I saw this problem with a
> > reautoconfiscated version of GMP.  This may be unusual, but there was
> > libtool used to invoke gas.
> >
> > While -DPIC is a noop for usual compilation, it is harmful when used
> > as gas flag to compile assembly, I suggest to remove it entirely when
> > target is cygwin. Change would be in libtool.m4 line 4971 ff in
> > libtool-1.5.10.
> >
> > Alternative: don't pass flag through when gas is called.
>
> I don't see anywhere that "-DPIC" is ever invoked on cygwin.  Please 
> send a patch to libtool.m4 that fixes the problem for you.

The problem is when a user (or makefile) adds this -DPIC, which does no 
harm usually. Gerrit thought that it might be clever to strip it on 
cygwin when gas is involved, since this does harm.
Or maybe emit a warning to fix the makefile for cygwin.
(Gerrit: Really -DPIC, not -fPIC?)

> BTW, somebody mentioned libtool CVS branch-2.0 as being too "cutting 
> edge" for cygwin use...FYI, libtool-cvs-branch2.0 passes ALL regression 
> tests which is better than libtool has EVER done on our platform.  I'm 
> thinking of releasing a test version of the next beta...

Ah! Cannot wait for that.
I couldn't find a fix for my -o <noext> => exe problem so far.
And libtool --debug is soo huge.
--
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/

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