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[Caml-list] Having problems with '-rpath' or '-rpath-link' to ocamlopt
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Date: -- (:)
From: Narayanan Krishnamurthy <Narayanan.Krishnamurthy@m...>
Subject: [Caml-list] Having problems with '-rpath' or '-rpath-link' to ocamlopt
Hi,

All the following discussions pertain to SunOS 5.8
the gnu linker 'ld 2.9.1', the gcc compiler 'gcc 2.95.2' and
ocaml 3.06.

I have two versions of the PCRE "C" libpcre.so
libraries. Let us say that the locations
of the "C" libraries are as follows.

a) v1.0 : /usr/local/lib/libpcre.so
b) v2.0 : /mylocal/libpcre.so

I've built the ocaml pcre package (5.02: pcre.cmxa and pcre.cma) 
using the "C" v2.0 shared library /mylocal/libpcre.so.
I have pcre.cmxa in my current working directory.

With my LD_LIBRARY_PATH set as
LD_LIBRARY_PATH = /lib:/usr/lib:/usr/local/lib
I now run
a) ocamlopt -o myexec pcre.cmxa myexec.o \
     -cclib -rpath/mylocal -cclib -lpcre

and find that 'myexec' has the /usr/local/lib/libpcre.so
as the run-time shared library instead of
/mylocal/libpcre.so (I use 'ldd' on 'myexec')

I tried the following as well and am unable to get
ocamlopt to link in the run-time library /mylocal/libpcre.so.

b) ocamlopt -o myexec pcre.cmxa myexec.o \
     -cclib -R/mylocal -cclib -lpcre
c) ocamlopt -o myexec pcre.cmxa myexec.o \
     -cclib -rpath-link/mylocal -cclib -lpcre

If I unset my LD_LIBRARY_PATH, everything works fine
and the correct library is linked in (I tried
'strings pcre.cmxa' and see the path /mylocal hard-coded
in there).
If I set LD_LIBRARY_PATH as
/lib:/usr/lib:/mylocal:/usr/local/lib
it works fine.

It seems like I am unable to override the LD_LIBRARY_PATH
environment variable using '-rpath' for the linker.
So, what am I doing wrong with the '-rpath' or '-rpath-link'
commands that I'm passing through 'ocamlopt'?
Any information would be greatly appreciated.
Thanks.


Narayanan Krishnamurthy (Nari)

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