Error when compiling mip1_c++ using VSCode on mac

Ongoing

Yingqiu Zhang

• March 02, 2020 17:54

Hi All,

 

I am working on macOS Mojave v10.14.6. I am running my code in VSCode, but I cannot compile it using following command:

clang++ -std=c++17 -stdlib=libc++ helloworld.cpp -o helloworld.exe -l /Library/gurobi901/mac64/include -L /Library/gurobi901/mac64/lib -lgurobi_c++ -lgurobi90 -m64

(I named the mip1_c++ file as helloworld)

I got following errors: 

ld: library not found for -l/Library/gurobi901/mac64/include
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I guess I did not successfully link the library to the project? I am new to Gurobi. Could any one help me out? Thanks!

0

• 

  Yingqiu Zhang

  • March 02, 2020 18:09

  

  

  

  By the way, I can successfully build all examples in /Library/gurobi901/mac64/examples/build using the makefile.

  0
• 

  Matthias Miltenberger

  Gurobi Staff

  • March 02, 2020 19:45
  • Edited

  Hi,

  You need to change "-l /Library/gurobi901/mac64/include" to "-I/Library/gurobi901/mac64/include". That's a capital "I" - to specify the include directory. The library is already loaded using "-L" and "-l".

  I would not call the binary EXE, by the way. This is usually only done on Windows.

  You might also want to check out CMake for easier compilation/building.

  Cheers,
  Matthias

  0
• 

  Yingqiu Zhang

  • March 02, 2020 21:32

  

  

  

  Hi,

  Thanks! It is my typo.

  The link in your post is very useful! Thanks for sharing! My next step is to learn how to use CMake to build c++ project. I tried to use the template of CMakeLists from the link, but I have following errors: 

  CMake Error: The following variables are used in this project, but they are set to NOTFOUND.

  Please set them or make sure they are set and tested correctly in the CMake files:

  GUROBI_CXX_LIBRARY

      linked by target "gurobi-template" in directory /Users/yingqiuzhang/Documents/TestVSC/helloworld

      linked by target "gurobi-template" in directory /Users/yingqiuzhang/Documents/TestVSC/helloworld

  GUROBI_INCLUDE_DIRS

     used as include directory in directory /Users/yingqiuzhang/Documents/TestVSC/helloworld

     used as include directory in directory /Users/yingqiuzhang/Documents/TestVSC/helloworld

     used as include directory in directory /Users/yingqiuzhang/Documents/TestVSC/helloworld

   

  -- Configuring incomplete, errors occurred!

  See also "/Users/yingqiuzhang/Documents/TestVSC/helloworld/build/CMakeFiles/CMakeOutput.log".

   

  I am new to this. I appreciate your help!

   

   

   

  0
• 

  Yingqiu Zhang

  • March 03, 2020 17:08

  

  

  

  I solved above issues by adding GRUOBI_HOME environment variable. 

  0
• 

  Jacob Jin

  • February 06, 2022 15:35

  

  

  

  Hi, I have encounter the same issues even thought I add the GRUOBI_HOME environment variable.  

  set(GUROBI_HOME "/Library/gurobi912/mac64")

  And that's my errors:

  

   

  

   

  The tsp is my file name, I don't know what should I do to fix the error, thank u so much!!

   

   

  1
• 

  Peter Dieter

  • June 18, 2022 18:48

  

  

  Jacob Jin
  I have the same issue. Did you manage to fix it?

  0

Please sign in to leave a comment.