Re: ITP: g-wrap (& question about -fPIC)

[Robert Bihlmeyer <robbe@orcus.priv.at>]

Robert Graham Merkel <rgmerk@mira.net> writes:

> The packages pass lintian, with one notable exception -
> libgwrapguile.so is not compiled with the -fPIC flag.  According to 
> policy, shared libraries should be compiled with -fPIC, while static
> libraries should not.  g-wrap uses automake, and therefore libtool,
> to compile its libraries.  Is there a "standard way" to set things up
> so that the .so gets compiled with -fPIC and the .a does not?

g-wrap already does it right. I downloaded and built your package. The
relevant portion from the make run:

/bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I..     -g -O2 -I/usr/include -c g-wrap-fns.c
rm -f .libs/g-wrap-fns.lo
gcc -DHAVE_CONFIG_H -I. -I. -I.. -g -O2 -I/usr/include -c  -fPIC -DPIC g-wrap-fns.c -o .libs/g-wrap-fns.lo
gcc -DHAVE_CONFIG_H -I. -I. -I.. -g -O2 -I/usr/include -c g-wrap-fns.c -o g-wrap-fns.o >/dev/null 2>&1
mv -f .libs/g-wrap-fns.lo g-wrap-fns.lo
/bin/sh ../libtool --mode=link gcc  -g -O2 -I/usr/include  -o libgwrapguile.la  -export-dynamic -rpath /usr/lib g-wrap-fns.lo -L/usr/lib -lguile -lqthreads -ldl -lm 
rm -fr .libs/libgwrapguile.la .libs/libgwrapguile.* .libs/libgwrapguile.*
gcc -shared  g-wrap-fns.lo  -L/usr/lib -lguile -lqthreads -ldl -lm -lc  -Wl,-soname -Wl,libgwrapguile.so.0 -o .libs/libgwrapguile.so.0.0.0
(cd .libs && rm -f libgwrapguile.so.0 && ln -s libgwrapguile.so.0.0.0 libgwrapguile.so.0)
(cd .libs && rm -f libgwrapguile.so && ln -s libgwrapguile.so.0.0.0 libgwrapguile.so)

Note that the only file going into the .so is g-wrap-fns.lo, which is
compiled using -fPIC.

The lintian check seems to produce false positives (it seems to check
for the presence of certain sections in .so files - being no ELF guru,
I can't comment on that). If this is not a known problem, you should
file a bug report.

-- 
Robbe