List of options to pass to the compiler.
This property holds a semicolon-separated list of options specified so far for its target. Use the target_compile_options() command to append more options.
This property is initialized by the COMPILE_OPTIONS directory property when a target is created, and is used by the generators to set the options for the compiler.
Contents of 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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https://cmake.org/cmake/help/v3.19/prop_tgt/COMPILE_OPTIONS.html