[SCIP] Scip 7.0.0 on a mac

[Victor Miller]

I finally got scip to work by doing

brew uninstall gcc
brew install gcc at 8

Since gcc 9 is out, are the plans to build a mac version using that?

On Sat, May 16, 2020 at 11:53 AM Stefan Vigerske <svigerske at gams.com> wrote:
>
> Hi,
>
>
> On 5/14/20 11:14 PM, Victor Miller wrote:
> > I'm currently trying to install Scip on my iMac
> > running Catalina.  I first tried to download the prebuilt mac version.
> > However, when I run scip I get the following error:
> >
> > ./scip
> > dyld: Library not loaded: /usr/local/opt/gcc/lib/gcc/8/libgfortran.5.dylib
> >    Referenced from:
> > /Users/victorsmiller/Programming/LP/SCIPOptSuite-7.0.0-Darwin/bin/./scip
> >    Reason: image not found
> > Abort trap: 6
> >
> > I do not have a directory /usr/local/opt/gcc/lib/gcc/8/ but do have a directory
> > /usr/local/opt/gcc/lib/gcc/9/
> >
> > So, I'm assuming that the prebuilt version was for an earlier version of gcc.
> > Are there some environment variables that I can set to fix this?
>
> You could try changing the library paths that are hardcoded in the SCIP
> binary to match your system by use of install_name_tool. Maybe your GCC
> 9 libs will fulfill the GCC 8 lib expectation of that prebuild binary.
> And maybe not.
>
> There is now another SCIP 7.0.0 executable for macOS here:
> https://scip.zib.de/download.php?fname=scip-7.0.0.darwin.x86_64.gnu.opt.spx2.none.zip
> That has the gfortran library linked in, but it's only the SCIP
> executable, no dylib, headers, no soplex, gcg, zimpl binaries.
>
> > I then downloaded scipoptsuite-7.0.0.tgz unpacked it, made a build
> > subdirectory and then did cmake .. in that directory.  This yielded
> > errors, where it said it couldn't find quadmath.h.
> >
> > I do have quadmath.h in the directory
> > /usr/local/gfortran/lib/gcc/x86_64-apple-darwin16/6.3.0/include/quadmath.h
> >
> > and the libraries in
> >
> > /usr/local/gfortran/lib/i386/libquadmath.0.dylib
> >
> > /usr/local/gfortran/lib/i386/libquadmath.dylib
> >
> > /usr/local/gfortran/lib/libquadmath.0.dylib
> >
> > /usr/local/gfortran/lib/libquadmath.dylib
> >
> > Any suggestions as to how I can get things built?
>
> Maybe there is some option to tell cmake to use some additional flags
> when compiler C++ code. Then you could try adding
> -I/usr/local/gfortran/lib/gcc/x86_64-apple-darwin16/6.3.0/include
> But if GCC 6.3.0 is picked up by cmake to build SCIP, then this
> directory should be searched for headers by default.
> And if GCC 6.3.0 is not picked up by cmake, but a different compiler,
> then something else seems to go wrong. The only place where I suspect
> quadmath.h to be included is from the boost headers, which may be used
> by SoPlex or PaPILO. You may want to check what boost installation is
> picked up on your system and whether that is correct.
>
> Stefan
>
> >
> > Victor Miller
> > _______________________________________________
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> > Scip at zib.de
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> >
>