[Ipopt] Trying to run IPOPT C++ example

[Alexander Martinez-Marchese]

Hi,


      I'm trying to run the C++ example described here:


https://www.coin-or.org/Ipopt/documentation/node23.html



So I copied the files myexample.cpp, hs071_nlp.cpp and hs071_nlp.cpp and I run the following in the terminal (within Ubuntu linux):


c++ -std=c++11 myexample.cpp hs071_nlp.cpp -o myexample -I /home/alex/Ipopt-3.12.8/include/coin


And I get the following error:


/tmp/ccIUQtXB.o: In function `main':
myexample.cpp:(.text+0x52): undefined reference to `IpoptApplicationFactory'
collect2: error: ld returned 1 exit status



I tested my IPOPT installation using 'make test' and I get this:

Running unitTests...
Testing AMPL Solver Executable...
    no AMPL solver executable found, skipping test...
Testing C++ Example...
    Test passed!
Testing C Example...
    Test passed!
Testing Fortran Example...
    Test passed!
make[2]: Leaving directory '/home/alex/Ipopt-3.12.8/Ipopt/test'
make[1]: Leaving directory '/home/alex/Ipopt-3.12.8/Ipopt'

Do I need AMPL for the example? Am I linking the files correctly? Is there a 'bare bones' C++ example that doesn't use smart pointers or the IpoptApplicationFactory?


I am able to use IPOPT from pyipopt to solve l-bfgs-b problems. The IPOPT installation was installed with the HSL files: http://www.hsl.rl.ac.uk/ipopt/



Thank you,

Alex



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