1COMPILE_DEFINITIONS 2------------------- 3 4Preprocessor definitions for compiling a directory's sources. 5 6This property specifies the list of options given so far to the 7:command:`add_compile_definitions` (or :command:`add_definitions`) command. 8 9The ``COMPILE_DEFINITIONS`` property may be set to a semicolon-separated 10list of preprocessor definitions using the syntax ``VAR`` or ``VAR=value``. 11Function-style definitions are not supported. CMake will 12automatically escape the value correctly for the native build system 13(note that CMake language syntax may require escapes to specify some 14values). 15 16This property will be initialized in each directory by its value in the 17directory's parent. 18 19CMake will automatically drop some definitions that are not supported 20by the native build tool. 21 22.. include:: /include/COMPILE_DEFINITIONS_DISCLAIMER.txt 23 24Contents of ``COMPILE_DEFINITIONS`` may use "generator expressions" with 25the syntax ``$<...>``. See the :manual:`cmake-generator-expressions(7)` 26manual for available expressions. See the :manual:`cmake-buildsystem(7)` 27manual for more on defining buildsystem properties. 28 29The corresponding :prop_dir:`COMPILE_DEFINITIONS_<CONFIG>` property may 30be set to specify per-configuration definitions. Generator expressions 31should be preferred instead of setting the alternative property. 32