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Diffstat (limited to 'Help/prop_tgt/UNITY_BUILD.rst')
| -rw-r--r-- | Help/prop_tgt/UNITY_BUILD.rst | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/Help/prop_tgt/UNITY_BUILD.rst b/Help/prop_tgt/UNITY_BUILD.rst index beac5d4..2faad92 100644 --- a/Help/prop_tgt/UNITY_BUILD.rst +++ b/Help/prop_tgt/UNITY_BUILD.rst @@ -5,27 +5,33 @@ Should the target source files be processed into batches for faster compilation. This feature is known as "Unity build", or "Jumbo build". -The `C` and `CXX` source files are grouped separately. +The ``C`` and ``CXX`` source files are grouped separately. This property is initialized by the value of the :variable:`CMAKE_UNITY_BUILD` variable if it is set when a target is created. -.. note :: +.. note:: - It's not recommended to directly set :prop_tgt:`UNITY_BUILD` - to `ON`, but to instead set :variable:`CMAKE_UNITY_BUILD` from - the command line. However, it IS recommended to set - :prop_tgt:`UNITY_BUILD` to `OFF` if you need to ensure that a - target doesn't get a unity build. + It's not recommended to directly set :prop_tgt:`UNITY_BUILD` + to ``ON``, but to instead set :variable:`CMAKE_UNITY_BUILD` from + the command line. However, it IS recommended to set + :prop_tgt:`UNITY_BUILD` to ``OFF`` if you need to ensure that a + target doesn't get a unity build. The batch size can be specified by setting :prop_tgt:`UNITY_BUILD_BATCH_SIZE`. The batching of source files is done by adding new sources files -wich will `#include` the source files, and exclude them from -building by setting :prop_sf:`HEADER_FILE_ONLY` to `ON`. +which will ``#include`` the source files, and exclude them from +building by setting :prop_sf:`HEADER_FILE_ONLY` to ``ON``. +.. note:: + + Marking the original sources with :prop_sf:`HEADER_FILE_ONLY` + is considered an implementation detail that may change in the + future because it does not work well in combination with + the :variable:`CMAKE_EXPORT_COMPILE_COMMANDS` variable. ODR (One definition rule) errors ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -45,11 +51,11 @@ The source files that have :prop_sf:`COMPILE_OPTIONS`, With the :prop_tgt:`UNITY_BUILD_CODE_BEFORE_INCLUDE` and :prop_tgt:`UNITY_BUILD_CODE_AFTER_INCLUDE` one can specify code to be injected in the unity source file before and after every -`#include` statement. +``#include`` statement. -.. note :: +.. note:: - The order of source files defined in the `CMakeLists.txt` will - be preserved into the generated unity source files. This can - be used to manually enforce a specific grouping based on the - :prop_tgt:`UNITY_BUILD_BATCH_SIZE`. + The order of source files defined in the ``CMakeLists.txt`` will + be preserved into the generated unity source files. This can + be used to manually enforce a specific grouping based on the + :prop_tgt:`UNITY_BUILD_BATCH_SIZE` target property. |