diff options
Diffstat (limited to 'Help/prop_tgt')
| -rw-r--r-- | Help/prop_tgt/AUTOMOC.rst | 3 | ||||
| -rw-r--r-- | Help/prop_tgt/AUTOMOC_DEPEND_FILTERS.rst | 45 |
2 files changed, 48 insertions, 0 deletions
diff --git a/Help/prop_tgt/AUTOMOC.rst b/Help/prop_tgt/AUTOMOC.rst index 4ac9b6e..b729c0b 100644 --- a/Help/prop_tgt/AUTOMOC.rst +++ b/Help/prop_tgt/AUTOMOC.rst @@ -57,6 +57,9 @@ See the documentation for this variable for more details. The global property :prop_gbl:`AUTOGEN_TARGETS_FOLDER` can be used to group the automoc targets together in an IDE, e.g. in MSVS. +Additional ``moc`` dependency file names can be extracted from source code +by using :prop_tgt:`AUTOMOC_DEPEND_FILTERS`. + Source C++ files can be excluded from :prop_tgt:`AUTOMOC` processing by enabling :prop_sf:`SKIP_AUTOMOC` or the broader :prop_sf:`SKIP_AUTOGEN`. diff --git a/Help/prop_tgt/AUTOMOC_DEPEND_FILTERS.rst b/Help/prop_tgt/AUTOMOC_DEPEND_FILTERS.rst new file mode 100644 index 0000000..810cbf4 --- /dev/null +++ b/Help/prop_tgt/AUTOMOC_DEPEND_FILTERS.rst @@ -0,0 +1,45 @@ +AUTOMOC_DEPEND_FILTERS +---------------------- + +Filter definitions used by :prop_tgt:`AUTOMOC` to extract file names from +source code as additional dependencies for the ``moc`` file. + +This property is only used if the :prop_tgt:`AUTOMOC` property is ``ON`` +for this target. + +Filters are defined as ``KEYWORD;REGULAR_EXPRESSION`` pairs. First the file +content is searched for ``KEYWORD``. If it is found at least once, then file +names are extracted by successively searching for ``REGULAR_EXPRESSION`` and +taking the first match group. + +Consider a filter extracts the file name ``DEP`` from the content of a file +``FOO``. If ``DEP`` changes, then the ``moc`` file for ``FOO`` gets rebuilt. +The file ``DEP`` is searched for first in the vicinity +of ``FOO`` and afterwards in the target's :prop_tgt:`INCLUDE_DIRECTORIES`. + +By default :prop_tgt:`AUTOMOC_DEPEND_FILTERS` is initialized from +:variable:`CMAKE_AUTOMOC_DEPEND_FILTERS`, which is empty by default. + +See the :manual:`cmake-qt(7)` manual for more information on using CMake +with Qt. + + +Example +------- + +Consider a file ``FOO.hpp`` holds a custom macro ``OBJ_JSON_FILE`` and we +want the ``moc`` file to depend on the macro`s file name argument:: + + class My_Class : public QObject + { + Q_OBJECT + OBJ_JSON_FILE ( "DEP.json" ) + ... + }; + +Then we might use :variable:`CMAKE_AUTOMOC_DEPEND_FILTERS` to +define a filter like this:: + + set(CMAKE_AUTOMOC_DEPEND_FILTERS + "OBJ_JSON_FILE" "[\n][ \t]*OBJ_JSON_FILE[ \t]*\\([ \t]*\"([^\"]+)\"" + ) |