Gurobi cannot compile with CUDA

Answered

Samiran Kawtikwar

• September 14, 2021 18:11

I can use standalone c++ codes with Gurobi on my linux machine.
I am trying to use Gurobi in a project which uses CUDA and has some .cu files

However all the Gurobi code is in .cpp file and I am compiling using the flags I use for my standalone codes.
The command is:

g++ -I/opt/gurobi912/linux64/include/ -I/usr/local/cuda/include -L/opt/gurobi912/linux64/lib -lgurobi_c++ -lgurobi91 -c helper.cpp -o ../o/helper.o

(helper.cpp) is the file with a function that uses Gurobi.

I get an error during compilation with undefined reference to every Gurobi class object.

helper.cpp:(.text+0x1ec): undefined reference to `GRBEnv::GRBEnv(bool)'
helper.cpp:(.text+0x20c): undefined reference to `GRBModel::GRBModel(GRBEnv const&)'
helper.cpp:(.text+0x258): undefined reference to `GRBVar::GRBVar()'
helper.cpp:(.text+0x2b5): undefined reference to `GRBVar::GRBVar()'

and so on..

Please help, the error seems to occur only when I have cuda APIs somewhere in my code.

1

• 

  Matthias Miltenberger

  Gurobi Staff

  • September 15, 2021 09:35

  Hi Samiran,

  Did you follow the suggestions in this guide already:
  How do I resolve "undefined reference" errors while linking Gurobi in C++? – Gurobi Support Portal

  Best regards,
  Matthias

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• 

  Samiran Kawtikwar

  • September 15, 2021 13:56

  

  

  

  Hi, thanks for commenting.
  Yes, I did. But it didn't help, it was probably setup just fine.
  I managed to fix the compilation error though.
  Turns out I had an error in the makefile, I did not link the library in all: target and thought it would take it from the individual compilation commands.

  0

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