[Clp] Error when building project with CLP using C++ and XCode.

[Jesse Jaanila]

Hi Miles,

That's actually a good question. After I posted my question I looked around
and found few Jupyter Notebooks describing how to setup
column generation scheme via JuMP. So i'm definitely going to try that
because my Julia+JuMP+Clp setup is working perfectly.

But i'd still like to know if my original problem could somehow be
resolved. I would guess that my C++ project setup doesn't take into account
all the
necessary dependencies that CLP needs (other that header files).

On Sat, May 7, 2016 at 10:09 PM, Miles Lubin <miles.lubin at gmail.com> wrote:

> Hi Jesse,
>
> Why do you feel that model building in C++ would be faster than JuMP? JuMP
> supports column generation and passes data directly to the in-memory Clp
> representation of the problem.
>
> Miles
>
> On Sat, May 7, 2016 at 9:20 AM, Jesse Jaanila <jessejaanila at gmail.com>
> wrote:
>
>> Hi!
>>
>> I've had success using CLP via Julia JuMP API, but now i'm trying to use
>> C++ for faster model building (column generation scheme).
>>
>> I'm on Mac OS X El Capitan with newest XCode and command line tools. I
>> built CLP 1.16 as described on
>> https://projects.coin-or.org/Clp with make, make test and make install.
>> Everything went fine and installation was successful.
>>
>> I am trying to build one of the examples; specifically
>> https://projects.coin-or.org/Clp/browser/trunk/Clp/examples/addColumns.cpp
>> to fiddle around with the C++ API.
>>
>> I set up search paths for header files and libraries (see picture link)
>> for my project.
>>
>> https://i.imgur.com/FdSdNNR.png
>>
>> This got away error "ClpSimplex.hpp file not found". So I was really
>> hopeful that that is all the configurating I need to do.
>>
>> But still my build fails. My error log is (main.cpp is my project file
>> name):
>>
>> *Undefined symbols for architecture x86_64:*
>>
>>   "ClpSimplex::loadProblem(CoinModel&, bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::setRowLower(int, double)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::setRowUpper(int, double)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::initialSolve()", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::allSlackBasis(bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::dual(int, int)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::resize(int, int)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::readMps(char const*, bool, bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::ClpSimplex(ClpSimplex const&, int)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::ClpSimplex(bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::~ClpSimplex()", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpSimplex::operator=(ClpSimplex const&)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpModel::addColumns(CoinModel&, bool, bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpModel::addColumns(CoinBuild const&, bool, bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpModel::deleteColumns(int, int const*)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpModel::addRows(int, double const*, double const*,
>> CoinPackedVectorBase const* const*)", referenced from:
>>
>>       _main in main.o
>>
>>   "ClpModel::addColumn(int, int const*, double const*, double, double,
>> double)", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinBuild::addColumn(int, int const*, double const*, double, double,
>> double)", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinBuild::CoinBuild()", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinBuild::~CoinBuild()", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinModel::setRowBounds(int, double, double)", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinModel::addColumn(int, int const*, double const*, double, double,
>> double, char const*, bool)", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinModel::CoinModel()", referenced from:
>>
>>       _main in main.o
>>
>>   "CoinModel::~CoinModel()", referenced from:
>>
>>       _main in main.o
>>
>> ld: symbol(s) not found for architecture x86_64
>>
>> *clang: error: linker command failed with exit code 1 (use -v to see
>> invocation)*
>>
>> Sadly i'm still quite new to C++ so I haven't been able to pinpoint what
>> the problem is. Could it be something trivial? Do I need something else
>> when building C++ project with CLP other than search setup for
>> Header/Library paths? Maybe someone else has had similar problem with mac
>> os x & XCode.
>>
>> Any ideas are helpful! Cheers,
>>
>> Jesse
>>
>> _______________________________________________
>> Clp mailing list
>> Clp at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/clp
>>
>>
>
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