Definition: In programming, it's a file used by the compiler to specify how it will compile code, including its target platform (e.g., Linux, Windows) and flags for optimization or other features. For example: ``` # This is a .maxCompiler_build.conf file in gcc toolchain Target: x86_64-unknown-linux-gnu CFLAGS="-O3" ``` The 'MaxCompiler' part stands for Max compiler, which is used by gcc to compile code. The '.Build' part specifies the build type and flags, while the 'Conf' part describes options like optimization level (e.g., -O3).