Re: allextract and defaultextract with Solaris and GCC

[Bob Friesenhahn]

I do see that one part of libtool is using

  ${wl}-z ${wl}defaultextract

but another is using

  -z defaultextract

Perhaps this fragment dates from before the C compiler was used to 
link.

Bob

On Wed, 21 Jul 2004, komiyama wrote:

> Hi,
>
> I have a problem with linking using libtool
>
> When libtool try to link shared library from convinient library, like,
>
> /bin/bash ../libtool --mode=link gcc  -g -O2  -o libresult.la -lelf -lmylib 
> subdir/libfoo.la subdir2/libvar.la
>
> It invoke gcc as,
>
> gcc -shared -Wl,-h -Wl,libresult.so.0 -o .libs/libresult.so.0.0.0  -z 
> allextract subdir/.libs/libfoo.a subdir2/.libs/libvar.a -z defaultextract 
> -lelf -lmylib
>
> The problem is gcc dropped "-z defaultextract". So in gcc internal, it called 
> linker as,
>
> /usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3/collect2 -V -G 
> -dy -z text -Y P,/usr/ccs/lib:/usr/lib -Qy -o .libs/libresult.so.0.0.0 
> /usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3/crti.o 
> /usr/ccs/lib/values-Xa.o 
> /usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3/crtbegin.o 
> -L/usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3 
> -L/usr/ccs/bin -L/usr/ccs/lib -L/usr/local/gcc/2.95.3/lib -h libresult.so.0 
> -z allextract subdir/.libs/libfoo.a subdir2/.libs/libvar.a -lelf -lmylib 
> -lgcc -lgcc 
> /usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3/crtend.o 
> /usr/local/gcc/2.95.3/lib/gcc-lib/sparc-sun-solaris2.7/2.95.3/crtn.o
>
> So linker try to link all symbol even specified with -l. So it cause symbol 
> conflict when convinient library and library specified with -l has same 
> symbol.
>
> I think in GCC case, libtool need to apply -z options as,
>
> ... -Wl,-z -Wl,allextract subdir/.libs/libfoo.a subdirs2/.libs/libvar.a 
> -Wl,-z -Wl,defaultextract ...
>
> ( whole_archive_flag_spec="-Wl,-z -Wl,allextract\$convenience -Wl,-z 
> -Wl,defaultextract" )
>
> Envionment:
> O.S. : Solaris8 (Sparc)
> GCC  : 2.95.3
> Autoconf/Automake/libtool:2.59/1.8.5/1.5.6
>
>
> Regards,
>    Takeo Komiyama
> -----------------------------------------------------------------------
>      Takeo Komiyama
>     Voice : +81-22-377-9767 Fax : +81-22-377-9709
>
>     Freescale semiconductor Inc.
>     2-9-1 , Akedori, Izumiku, Sendai-shi, Miyagi-ken 981-3206
>        Email :    address@hidden
> -----------------------------------------------------------------------
>
>
>
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======================================
Bob Friesenhahn
address@hidden
http://www.simplesystems.org/users/bfriesen