This document describes the recommended coding style for CMake files in KDE, i.e. CMakeLists.txt files and *.cmake files.
Indent all code correctly, i.e. the body of
Use spaces for indenting, 2, 3 or 4 spaces preferably. Use the same amount of spaces for indenting as is used in the rest of the file.
CMake commands are case-insensitive (only the commands, not the arguments or variable names). So all the following versions work:
add_executable(foo foo.c) ADD_EXECUTABLE(bar bar.c) Add_Executable(hello hello.c) aDd_ExEcUtAbLe(blub blub.c)
But this would be ugly.
In KDE the all-lowercase style is preferred. The all-uppercase style is also ok. Mixing upper- and lowercase should not be done in KDE CMake files. Although all-lowercase is preferred, if a file is apparently in all-uppercase style, then stay consistent and also use all-uppercase in this file.
You are free to use pkg-config in FindXXX.cmake modules, as long as the following conditions are met:
if(FOO_LIBRARY AND FOO_INCLUDE_DIR) set(FOO_FOUND TRUE) else() ... execute the whole find-logic endif()
should be removed, the find-logic should be executed always. These shortcuts can cause problems e.g. when the same file is used from multiple directories but e.g. with different required versions or components etc.