Re: Shared libraries build on Linux, not on Solaris 10 (gcc)

[Jason Curl]

Ralf Wildenhues wrote:
> * Jason Curl wrote on Fri, Aug 17, 2007 at 12:05:44AM CEST:
>   
> > I've just switched over to using libtool instead of using static 
> > libraries. I've installed autoconf-2.61, automake-1.10 and libtool-1.5.24.
> >
> > The library builds fine under Linux, but won't link under Solaris Sparc 
> > 2.10.
> >     
> [...]
>   
> > /opt/sfw/bin/gcc -shared  .libs/console.o .libs/file.o .libs/output.o 
> > .libs/profile.o .libs/queue.o .libs/serial.o .libs/strfunc.o 
> > .libs/tcpip.o .libs/ipcproto.o .libs/dbgmsg.o .libs/appframework.o 
> > .libs/confopts.o .libs/netif.o .libs/ether_ntoa.o .libs/getline.o 
> > .libs/strnlen.o .libs/timersub.o .libs/timeradd.o  -lnsl -lsocket 
> > -lcurses -lc  -Wl,-soname -Wl,liblogger.so.0 -o .libs/liblogger.so.0.0.0
> > ld: warning: option -o appears more than once, first setting taken
> > ld: fatal: file liblogger.so.0: open failed: No such file or directory
> > ld: fatal: File processing errors. No output written to 
> > .libs/liblogger.so.0.0.0
> > collect2: ld returned 1 exit status
> >     
> [...]
>   
> > So I play around a little with the options.
> >
> > 1. Remove -wl,-soname
> >     
>
> That won't do good unless you also remove the argument to -soname, i.e.,
> remove -Wl,liblogger.so.0.  Could you please try merging this, i.e.,
> instead of 
>   -Wl,-soname -Wl,liblogger.so.0
>
> use
>   -Wl,-soname,liblogger.so.0
>
> and also add -v to see whether gcc happens to reorder arguments for ld?
>
> Just to be sure: the .libs directory does exist, no?
>   
The .libs directory exists. Using the recommendation 
-Wl,-soname,liblogger.so.0 didn't work either. but...

I'm stumped. I just recompiled, and it worked. The libtool command was 
the same, but the command generated by libtool changed (I added 
something to check for 'ld' and 'ar').

/opt/sfw/bin/gcc -shared -Wl,-h -Wl,liblogger.so.0 -o 
.libs/liblogger.so.0.0.0  .libs/console.o .libs/file.o .libs/output.o 
.libs/profile.o .libs/queue.o .libs/serial.o .libs/strfunc.o 
.libs/tcpip.o .libs/ipcproto.o .libs/dbgmsg.o .libs/appframework.o 
.libs/confopts.o .libs/netif.o .libs/ether_ntoa.o .libs/getline.o 
.libs/strnlen.o .libs/timersub.o .libs/timeradd.o  -lnsl -lsocket 
-lcurses -lc

I've got a very little idea how libtool works. The ordering of the 
-Wl,xx changed and so did a new option appear. The only thing I can 
think of is I did a configure and build with 'cc' and somehow recompiled 
with 'gcc' (looks plausible from my last post), or even configured on 
linux and built on solaris (I'm using NFS), which if it were the case, 
all bets are off of course.

> In another mail:
>   
> > * Cygwin 1.5.24 with stuff uses an old version too (works, static only,
> > I'll deal with that later)
> >     
>
> Typically that's because you need to add -no-undefined.
>   
Well, I guess I need to add support specifically for Cygwin with 
AC_LIBTOOL_WIN32_DLL first.
> Thanks,
> Ralf
>
>