[CMake] incrementally adding source file properties

[Bill O'Hara]

Is it possible to incrementally add new properties to source files? In two
parts of a large build there are cases where it'd be very convenient to be
able to do this:

set_source_file_properties(foo.c PROPERTIES COMPILE_FLAGS "-m32")

set_source_file_properties(foo.c PROPERTIES COMPILE_FLAGS "-g")


and have the properties be "-m32 -g". Right now it seems to instead just set
it to "-g" and there seems not to be a way to read the properties and use
the existing value as part of a new string?


There isn't always a place to definitively set the properties so its not an
option right now to build up the options in a separate variable and just do
the set_source_file_properties once.


thanks

b.
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