Bug with shared libs, Solaris Workshop

[Jeff Squyres]

Greetings.  I have noticed a problem with building shared libraries 
with the native Solaris Workshop compilers in 64 bit mode:

- Solaris 2.8
- Libtool 1.5.14
- Workshop 6 update 2 C 5.3 Patch 111679-14 2004/02/20

The problem seems to be when combining convenience libraries into an 
overall library.  I have a toy Automake-based project that builds 2 
convenience libraries and combines them into 1, and then tries to link 
a toy executable against it.

Libtool seems to be passing wrong arguments to ld to create the 1 
shared library from the 2 convenience libraries.  Here's the configure 
command that I used with my toy AM project:

-----
$ ./configure CC=cc CXX=CC CFLAGS=-xarch=v9 CXXFLAGS=-xarch=v9 
--disable-static --enable-shared
-----

Here's the libtool command that AM issues when it tries to combine the 
two convenience libraries into the upper-level library:

-----
/bin/bash ../libtool --tag=CC --mode=link cc  -xarch=v9    -o 
liblt_pgi_c.la -rpath /usr/local/lib   one/liblt_pgi_c_one.la  
two/liblt_pgi_c_two.la
-----

Libtool then turns that into:

------
/usr/ccs/bin/ld -G -h liblt_pgi_c.so.0 -o .libs/liblt_pgi_c.so.0.0.0  
-Wl,-z -Wl,allextract one/.libs/liblt_pgi_c_one.a 
two/.libs/liblt_pgi_c_two.a -Wl,-z -Wl,defaultextract  -lc
------

ld emits 4 warnings about "illegal option -- W", and then gives a usage 
message for ld (note that I'm not sure what happened to -xarch=v9, 
although that's somewhat irrelevant -- see below).  The correct syntax 
appears to be:

-----
/usr/ccs/bin/ld -G -h liblt_pgi_c.so.0 -o .libs/liblt_pgi_c.so.0.0.0 
-64 -z allextract one/.libs/liblt_pgi_c_one.a 
two/.libs/liblt_pgi_c_two.a -z defaultextract -lc
-----

The changes are:

1. Eliminate the -Wl, prefixes (which makes sense -- we're invoking the 
linker directly, so "-Wl," isn't necessary)
2. Change -xarch=v9 into -64

--> Note that there are a few variations of -xarch -- possible values 
are "v9", "v9a", or "v9b".  To the linker, they all transform into -64 
(the distinctions between the three are only meaningful to the 
compiler).

I see that LT has support for 64 bit builds on Solaris, and I know that 
this used to work in the past.  So I don't know if something changed in 
the Solaris ld to make this not work or if something else changed.  But 
as it stands now, convenience libraries for shared libraries don't 
work.

Hopefully the information provided above is enough to fix the current 
problems.  Please let me know if I can provide any further information.

Thanks!

--
{+} Jeff Squyres
{+} address@hidden
{+} http://www.lam-mpi.org/