Help building opensource AMD OPEN64 compiler and C mining tools.

I need some help from an expert in compiling C, C++, C# type applications. I am trying to build AMD's OPEN64 compiler on CentOS but I get these errors after 10 minutes of "make build" /root/x86_open64-4.5.2.1/osprey/../../x86_open64-4.5.2.1/osprey/be/opt/[login to view URL]:46: error: ‘_SC_CLK_TCK’ was not declared in this scope unsigned long long clktckspersec = sysconf(_SC_CLK_TCK); ^ /root/x86_open64-4.5.2.1/osprey/../../x86_open64-4.5.2.1/osprey/be/opt/[login to view URL]:57: error: ‘sysconf’ was not declared in this scope unsigned long long clktckspersec = sysconf(_SC_CLK_TCK); I am not an expect I need someone to help me solve these errors and to help me build the compiler and the open source mining tools XMR-STAK and XM-RIG for performance comparison against GCC8. Upon accepting I will give you server access to one one the servers I am working on for you to start work. Thanks for your bid! Jeff