| <RULE>_PATTERNS |
| --------------- |
| |
| .. versionadded:: 4.5 |
| |
| Patterns specification for instantiating the rule ``<RULE>``. |
| |
| The ``<RULE>_PATTERNS`` property may be set to a |
| :ref:`semicolon-separated list <CMake Language Lists>` of patterns using the |
| syntax ``PATTERN=VALUE`` or ``PATTERN=``. More precisely, each item must match |
| the regular expression ``(^[A-Z][A-Z0-9_]+)=(.*)$``. |
| |
| CMake will automatically drop any patterns which do not match against this |
| regular expression. |
| |
| The list is ordered, so a pattern can use in its definition a previously |
| defined pattern. In the following example, |
| ``OUTPUT_DIR=/some/path;OUTPUT_FILE=<OUTPUT_DIR>/my_file``, when the pattern |
| ``<OUTPUT_FILE>`` is expanded, the pattern ``<OUTPUT_DIR>`` is already known. |
| |
| Related properties: |
| |
| * :prop_fs:`RULE_PATTERNS` to specify patterns for a file set. |
| |
| Related commands: |
| |
| * :command:`add_custom_rule` for custom rule specification. |
