I ran into an issue with compiling GNU Go 3.8 on Amazon Linux 2023 (gcc (GCC) 11.3.1 20221121 (Red Hat 11.3.1-4)).
I receive the follow error when running `./configure` and `make`: gcc -g -O2 -o mkpat mkpat.o transform.o dfa.o ../utils/libutils.a -lm > /usr/bin/ld: > transform.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:861: > multiple definition of `meaningless_white_moves'; > mkpat.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:861: > first defined here > /usr/bin/ld: > transform.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:860: > multiple definition of `meaningless_black_moves'; > mkpat.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:860: > first defined here > /usr/bin/ld: > dfa.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:861: > multiple definition of `meaningless_white_moves'; > mkpat.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:861: > first defined here > /usr/bin/ld: > dfa.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:860: > multiple definition of `meaningless_black_moves'; > mkpat.o:/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns/../engine/liberty.h:860: > first defined here > collect2: error: ld returned 1 exit status > make[2]: *** [Makefile:371: mkpat] Error 1 > make[2]: Leaving directory > '/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8/patterns' > make[1]: *** [Makefile:232: all-recursive] Error 1 > make[1]: Leaving directory '/home/ec2-user/kgsGtp-3.5.23/gnugo-3.8' > make: *** [Makefile:168: all] Error 2 My solution was to move the following lines from `liberty.h` to `unconditional.c`: /* Unconditionally meaningless moves. */ > int meaningless_black_moves[BOARDMAX]; > int meaningless_white_moves[BOARDMAX]; This change allowed me to compile successfully. I am not a C programmer. Is this a reasonable change to make and does not functionally affect the program? Why was this error encountered in the first place? Thank you.
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