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add_definitions
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---------------
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Adds -D define flags to the compilation of source files.
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::
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add_definitions(-DFOO -DBAR ...)
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Adds definitions to the compiler command line for targets in the current
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directory and below (whether added before or after this command is invoked).
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This command can be used to add any flags, but it is intended to add
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preprocessor definitions.
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.. note::
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This command has been superseded by alternatives:
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* Use :command:`add_compile_definitions` to add preprocessor definitions.
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* Use :command:`include_directories` to add include directories.
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* Use :command:`add_compile_options` to add other options.
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Flags beginning in -D or /D that look like preprocessor definitions are
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automatically added to the :prop_dir:`COMPILE_DEFINITIONS` directory
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property for the current directory. Definitions with non-trivial values
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may be left in the set of flags instead of being converted for reasons of
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backwards compatibility. See documentation of the
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:prop_dir:`directory <COMPILE_DEFINITIONS>`,
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:prop_tgt:`target <COMPILE_DEFINITIONS>`,
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:prop_sf:`source file <COMPILE_DEFINITIONS>` ``COMPILE_DEFINITIONS``
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properties for details on adding preprocessor definitions to specific
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scopes and configurations.
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See the :manual:`cmake-buildsystem(7)` manual for more on defining
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buildsystem properties.
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