Hi, I'm curious about the reason behind choosing to do your own configure tool instead of using tools like autotools or cmake? Because for me it increases the chance to introduce bugs in the build system since you are redeveloping tests to know whether a library is present or not, the system to check if a flag is supported by the compiler, to check if a function is present, to manage different platforms,... All of these things are provided by tools like autotools or cmake. For example, I noticed that the part that check if the compiler options are supported, is not working. Try adding a flag supported by gcc but not by clang and use clang to compile or vice-versa. Thanks