# COMPILE_FLAGS

Additional flags to be added when compiling this source file.

The `COMPILE_FLAGS` property, managed as a string, sets additional compiler flags used to build source files. Use `COMPILE_DEFINITIONS` to pass additional preprocessor definitions.

Contents of `COMPILE_FLAGS` may use “generator expressions” with the syntax `$<...>`. See the `cmake-generator-expressions(7)` manual for available expressions. However, `Xcode` does not support per-config per-source settings, so expressions that depend on the build configuration are not allowed with that generator.

Note

This property has been superseded by the `COMPILE_OPTIONS` property.