Undefined reference error during compling

[colejensen]

Describe the bug
During the make step, compiling fails. I get the following messages:

igor_1-4-0/igor_src/Deletion.cpp:293: undefined reference to comp_nt_int(int const&, int const&)'
igor_1-4-0/igor_src/Deletion.cpp:794: undefined reference to comp_nt_int(int const&, int const&)'
igor_1-4-0/igor_src/Deletion.cpp:531: undefined reference to comp_nt_int(int const&, int const&)'

followed by:
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:446: igor] Error 1
make: *** [Makefile:386: all] Error 2

I have attached the full log of both the ./configure step and the output of the make step.

Steps to reproduce the bug
./configure CC=gcc-7 CXX=g++-7
make

System information:

• IGoR version 1.4.0
• OS: Ubuntu 20.04
• Compiler and compiler version GCC 7.5.0 and G++ 7.5.0 (I was using the 9.4.0 versions of both and got the same error, saw the message about error Compilation issue with GCC 8.1 on Mac OS X #22 and downgraded).
  config.log
  make.log