cmake (3.27.7)

(root)/
share/
cmake-3.27/
Modules/
Platform/
Linux-Initialize.cmake
set(LINUX 1)
set(UNIX 1)

# Match multiarch library directory names.
set(CMAKE_LIBRARY_ARCHITECTURE_REGEX "[a-z0-9_]+(-[a-z0-9_]+)?-linux-gnu[a-z0-9_]*")