Compilation issue on 20.04

[xepost]

Hi ,

I go ahead with the recommendation of "-std=c++14" change in the cmakes, and installed dw. All is compiling other than lkh_tsp_solver and lkh_mtsp_solver. I am getting the following error.

usr/bin/ld: CMakeFiles/lkh_tsp_solver.dir/src/SolveCompressedSubproblem.c.o:(.bss+0xa0): multiple definition of PatchingCExtended; CMakeFiles/lkh_tsp_solver.dir/src/Activate.c.o:(.bss+0xa0): first defined here /usr/bin/ld: CMakeFiles/lkh_tsp_solver.dir/src/SolveCompressedSubproblem.c.o:(.bss+0xa4): multiple definition of PatchingARestricted; CMakeFiles/lkh_tsp_solver.dir/src/Activate.c.o:(.bss+0xa4): first defined here /usr/bin/ld: CMakeFiles/lkh_tsp_solver.dir/src/SolveCompressedSubproblem.c.o:(.bss+0xa8): multiple definition of PatchingAExtended; CMakeFiles/lkh_tsp_solver.dir/src/Activate.c.o:(.bss+0xa8): first defined here /usr/bin/ld: CMakeFiles/lkh_tsp_solver.dir/src/SolveCompressedSubproblem.c.o:(.bss+0xac): multiple definition of MoorePartitioning; CMakeFiles/lkh_tsp_solver.dir/src/Activate.c.o:(.bss+0xac): first defined here /usr/bin/ld: CMakeFiles/lkh_tsp_solver.dir/src/SolveCompressedSubproblem.c.o:(.bss+0xb0): multiple definition of KMeansPartitioning; CMakeFiles/lkh_tsp_solver.dir/src/Activate.c.o:(.bss+0xb0): first defined here

I tried to compile the LKH-3.0.6 and I get the same error. Also checked LKH-3.0.5, which also does not compile on Ubuntu20.04, LKH-3.0.7 and LKH-3.0.8 compiles but there are some changes on the APIs, so not sure how to add that part.

I did take a look at FUEL repo, but did not see much information other than the ones Known Issues part. Any recommendations?

[xepost]

I solved it by downgrading to gcc/g++9, I was using gcc/g++ 11. Please feel free to close.

[Badrivishal]

I tried the same but the simulation is crashing after a while
How did you overcome that?