Make ioapi installation error

Hi everyone, my system is Ubuntu 20.4 and my compiler is GNU.
I try to install IOAPI library .when I want to make BIN directory with " setenv BIN uname -s``uname -r | cut -d. -f1 " command I see that my machine type is Linux5_x86_64 which is not in make-include files and I have to create it myself. so I rename Linux2_x86_64 to Linux5_x86_64.
When I want to make my ioapi source directory, I see an error which is “/ioapi-3.2/ioapi/Makeinclude.Linux5_x86_64: No such file or directory”
How can I fix this problem ?

You might try following the I/O API build-instructions, which can be found at