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# add_compile_options

Adds options to the compilation of source files.

    add_compile_options(<option> ...)

Adds options to the compiler command line for sources in the current directory and below. This command can be used to add any options, but alternative commands exist to add preprocessor definitions (`target_compile_definitions()` and `add_definitions()`) or include directories (`target_include_directories()` and `include_directories()`). See documentation of the `directory` and :prop_tgt:` target <COMPILE_OPTIONS>` `COMPILE_OPTIONS` properties.

Arguments to `add_compile_options` may use “generator expressions” with the syntax `$<...>`. See the `cmake-generator-expressions(7)` manual for available expressions. See the `cmake-buildsystem(7)` manual for more on defining buildsystem properties.

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