[SCIP] Shared library build of SCIP on Mac OS X with gcc

[Matthias Koeppe]

On Tue, Jul 26, 2016 at 5:50 AM, Matthias Miltenberger
<miltenberger at zib.de> wrote:
> I just tried to compile the SCIP Opt Suite 3.2.1 on a Mac and worked without
> issues (using the clang compiler); also PySCIPOpt works fine with this
> library. It does indeed generate a .so library instead of an .dylib but a at
> least according to this SO thread this does not seem to be a problem:
>
> https://stackoverflow.com/questions/2339679/what-are-the-differences-between-so-and-dylib-on-osx

I finally got it working. For the reasons that I explained before, I
prefer to build libsoplex, libscip, etc. separately and to record the
library dependencies.
All of the "make install" scripts are not usable on Mac OS in a shared
library build. One needs to use "install_name" for the installed
libraries and binaries to work.

See https://trac.sagemath.org/ticket/21094 for something that works.

It consists of the
 - spkg-install script which does the installation, using a
handcrafted set of make variables for soplex and scip
 - a patch to the scip Makefile to fix the library dependencies.

The result is a set of dylibs that has proper library dependencies.
This can be checked using "otool -L" (see below). Linking a program
using "-lscip" then just works.

============
otool -L /Users/mkoeppe/cvs/sage/local/lib/libscip.dylib
/Users/mkoeppe/cvs/sage/local/lib/liblpispx.dylib
/Users/mkoeppe/cvs/sage/local/lib/libsoplex.dylib
/Users/mkoeppe/cvs/sage/local/lib/libscip.dylib:
/Users/mkoeppe/cvs/sage/local/lib/libscip-3.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libgmp.16.dylib (compatibility
version 23.0.0, current version 23.2.0)
/Users/mkoeppe/cvs/sage/local/lib/libz.1.dylib (compatibility version
1.0.0, current version 1.2.8)
/Users/mkoeppe/cvs/sage/local/lib/libreadline.6.dylib (compatibility
version 6.0.0, current version 6.3.0)
/Users/mkoeppe/cvs/sage/local/lib/liblpispx-3.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libnlpi.cppad-3.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libstdc++.6.dylib (compatibility
version 7.0.0, current version 7.20.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
version 1226.10.1)
/Users/mkoeppe/cvs/sage/local/lib/libgcc_s.1.dylib (compatibility
version 1.0.0, current version 1.0.0)

/Users/mkoeppe/cvs/sage/local/lib/liblpispx.dylib:
/Users/mkoeppe/cvs/sage/local/lib/liblpispx-3.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libgmp.16.dylib (compatibility
version 23.0.0, current version 23.2.0)
/Users/mkoeppe/cvs/sage/local/lib/libz.1.dylib (compatibility version
1.0.0, current version 1.2.8)
/Users/mkoeppe/cvs/sage/local/lib/libreadline.6.dylib (compatibility
version 6.0.0, current version 6.3.0)
/Users/mkoeppe/cvs/sage/local/lib/libsoplex-2.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libstdc++.6.dylib (compatibility
version 7.0.0, current version 7.20.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
version 1226.10.1)
/Users/mkoeppe/cvs/sage/local/lib/libgcc_s.1.dylib (compatibility
version 1.0.0, current version 1.0.0)

/Users/mkoeppe/cvs/sage/local/lib/libsoplex.dylib:
/Users/mkoeppe/cvs/sage/local/lib/libsoplex-2.2.1.darwin.x86_64.gnu.opt.dylib
(compatibility version 0.0.0, current version 0.0.0)
/Users/mkoeppe/cvs/sage/local/lib/libgmp.16.dylib (compatibility
version 23.0.0, current version 23.2.0)
/Users/mkoeppe/cvs/sage/local/lib/libz.1.dylib (compatibility version
1.0.0, current version 1.2.8)
/Users/mkoeppe/cvs/sage/local/lib/libstdc++.6.dylib (compatibility
version 7.0.0, current version 7.20.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
version 1226.10.1)
/Users/mkoeppe/cvs/sage/local/lib/libgcc_s.1.dylib (compatibility
version 1.0.0, current version 1.0.0)
=============

Hoping that you and other SCIP developers find this helpful for
revising the build system in a future version.

Best
Matthias
-- 
Dr. Matthias Koeppe . . . . . . . . . . . http://www.math.ucdavis.edu/~mkoeppe
Professor, Mathematics
Chair, Applied Mathematics (Graduate Group) . . http://appliedmath.ucdavis.edu