When I try to run it under Linux, I get the following error:
./THEg.x86_64: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.38' not found (required by ./THEg.x86_64)
The highest version of libc my distribution (the latest release of Linux Mint, fully up to date) offers via their repository is 2.35! Could you possibly recompile this with the slightly older libc version for broader cross-distribution compatibility?