libtool 1.5 on hppa2.0-hp-hpux10.20

[Steve Edwards]

Just for the information of the libtool maintainers I thought you might 
be interested in a few 'features' of the hpux system.

I have just been trying libtool 1.5 on this architecture using the 
native hp tools. I am using the HP ANSI C compiler and HP FORTRAN/9000.

When trying to build shared libraries, libtool checks that the PIC flag 
(+Z) actually works. The check with the C compiler fails. The comment 
in the configure script states that:

 # The compiler can only warn and ignore the option if not recognized
 # So say no if there are warnings

Unfortunately, on this platform, there is also a warning message 
generated by cc saying:

 (Warning) At least one PA 2.0 object file (conftest.o) was detected. 
The linked output may not run on a PA 1.x system.

which is completely unrelated to the +Z but causes libtool to report a 
failure anyway.

The fortran compiler does not appear to generate this warning but also 
reports that the PIC flag (+Z) does not work. The fortran compiler 
sends the following message to stderr when checking +Z

conftest.f:
   t:

and as the conftest.err file is not zero sized, libtool again reports a 
failure when all the compiler is doing is reporting compilation 
progress. The same 'feature' of the HP compiler causes libtool to also 
report that fort77 does not support -c -o file.o which it certainly 
does.

Everything works fine though if you switch to using gcc...

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