Libtool misfeature on HP-UX

[Schleicher Ralph (LLI)]

ltmain.sh (GNU libtool) 1.4.2 (1.922.2.54 2001/09/11 03:33:37)

Hi,

I encountered a problem with Libtool libraries on HP-UX.
Consider the following (simplified) Makefile.am:

----------------
lib_LTLIBRARIES = libfoo.la libbar.la

libfoo_la_SOURCES = foo.c

libbar_la_SOURCES = bar.c
libbar_la_LDFLAGS = libfoo.la
----------------

When relinking libbar.la for installation, the command sequence is

----------------
libtool: install: warning: relinking `libbar.la'
cd /home/w3016.5/schleich/tmp/foo; /bin/sh ./libtool --mode=relink \
gcc -g -O2 -o libbar.la -rpath /usr/local/lib libfoo.la libbar_la-bar.lo
/usr/ccs/bin/ld -b +h libbar.sl +b /usr/local/lib -o .libs/libbar.sl \
libbar_la-bar.lo /usr/local/lib/libfoo.sl -lc
----------------

The problem is that libfoo.sl is not subject to dynamic file name lookup
via the built-in library search path or SHLIB_PATH environment variable
(LD_LIBRARY_PATH on HP-UX 11.00) because it has been specified as an
absolute file name and *not* via a -l or -l: switch.  This is a problem
if you want to make a binary distribution with a different directory
layout -- just setting SHLIB_PATH does not work.

I propose to translate the Libtool link command on HP-UX as follows:

----------------
/usr/ccs/bin/ld -b +h libbar.sl +b /usr/local/lib -o .libs/libbar.sl \
libbar_la-bar.lo /usr/local/lib/libfoo.sl -lc
/usr/ccs/bin/chatr -l /usr/local/lib/libfoo.sl .libs/libbar.sl >/dev/null
----------------

The chatr(1) command has the following effect:

----------------
$ chatr .libs/libbar.sl
.libs/libbar.sl:
         shared library
         shared library dynamic path search:
             SHLIB_PATH     enabled   first
             embedded path  enabled   second /usr/local/lib
         internal name:
             libbar.sl
         shared library list:
             static    /usr/local/lib/libfoo.sl <<< *look here*
             dynamic   /usr/lib/libc.1
[...]

$ chatr -l /usr/local/lib/libfoo.sl .libs/libbar.sl
.libs/libbar.sl:
         shared library
         shared library dynamic path search:
             SHLIB_PATH     enabled   first
             embedded path  enabled   second /usr/local/lib
         internal name:
             libbar.sl
         shared library list:
             dynamic   /usr/local/lib/libfoo.sl <<< *look here*
             dynamic   /usr/lib/libc.1
[...]
----------------

Here is the relevant section from the chatr(1) manual page:

----------------
           -l library     Indicate that the specified shared library is
                          subject to run-time path lookup if directory
                          path lists are provided (see +s and +b).
----------------

Best regards,

-- 
Ralph