add_compile_options ------------------- Add options to the compilation of source files. .. code-block:: cmake add_compile_options(<option> ...) Adds options to the :prop_dir:`COMPILE_OPTIONS` directory property. These options are used when compiling targets from the current directory and below. Arguments ^^^^^^^^^ Arguments to ``add_compile_options`` may use "generator expressions" with the syntax ``$<...>``. See the :manual:`cmake-generator-expressions(7)` manual for available expressions. See the :manual:`cmake-buildsystem(7)` manual for more on defining buildsystem properties. .. include:: OPTIONS_SHELL.txt Example ^^^^^^^ Since different compilers support different options, a typical use of this command is in a compiler-specific conditional clause: .. code-block:: cmake if (MSVC) # warning level 4 and all warnings as errors add_compile_options(/W4 /WX) else() # lots of warnings and all warnings as errors add_compile_options(-Wall -Wextra -pedantic -Werror) endif() See Also ^^^^^^^^ This command can be used to add any options. However, for adding preprocessor definitions and include directories it is recommended to use the more specific commands :command:`add_compile_definitions` and :command:`include_directories`. The command :command:`target_compile_options` adds target-specific options. The source file property :prop_sf:`COMPILE_OPTIONS` adds options to one source file.