[Coin-discuss] Finding libs at run time and Cbc/Dylp

[Laszlo Ladanyi]

On Sat, 25 Mar 2006, Francois Margot wrote:

> 
> I jut downloaded COIN this morning from cvs. Several changes have
> been made to the makefiles, apparently.
> 
> After compiling several COIN packages (Bcp, Cbc) with all the defaults
> Linux settings (including SHARED libraries), they are not able to find
> the libraries in COIN/lib at run time. I have to add COIN/lib to 
> LD_LIBRARY_PATH to run them successfully. This happens on RedHat Enterprise
> Linux and Fedora Core 3 using gcc3.2.
> 
> I never noticed that before (but I usually work with STATIC libs). 
> Am I the only one experiencing this? If not, either the installation 
> procedures should indicate modifying LD_LIBRARY_PATH (as far as I know, 
> none of the INSTALL files mention this, and  this is not mentioned in 
> the FAQs either) or some changes in the makefiles are necessary.

Interesting. I have no such problem. Could you check the final link line and
see -f there are -Wl,-rpath,... arguments there? If not, can you check the
value of SHLINK_PREFIX?

> 
> Second, why should Dylp be installed to compile Cbc? Removing Dylp from the
> line
> 
> CBC_SOLVERS := Clp Dylp
> 
> and replacing
> 
> cbcDefaultSolver := dylp
> 
> by
> 
> cbcDefaultSolver := clp
> 
> in COIN/Cbc/Makefile
> 
> seems to work fine. It would be better either to install Dylp by default
> in COIN/Makefiles/Makefile.location, or to remove Dylp from the defaults
> in COIN/Cbc/Makefile. A very quick look makes me believe that only
> the code in Coin/Cbc/Test uses (possibly) Dylp. Forcing the installation
> of Dylp for the Cbc library seems a little bit strange.

I have a feeling that this was an accidental commit on Lou's part :-). Can you
comment on this, Lou?

> 
> Francois

--Laci