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Depend: Hook up automatic target-level dependencies via byproducts

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Target-level dependencies to utility targets are added from another target if
the other target requires a byproduct of the utility target or if it requires a
byproduct of PRE_BUILD, PRE_LINK, or POST_BUILD build events of a target.

Issue: #19005
This commit is contained in:
Daniel Eiband
2019-09-11 12:45:50 +02:00
parent 2edb0b71ed
commit f6574c9a81
3 changed files with 28 additions and 17 deletions
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6
Help/command/add_custom_command.rst
View File

@@ -68,9 +68,6 @@ The options are:
order-only dependencies to ensure the byproducts will be
available before their dependents build.
The ``BYPRODUCTS`` option is ignored on non-Ninja generators
except to mark byproducts ``GENERATED``.
``COMMAND``
Specify the command-line(s) to execute at build time.
If more than one ``COMMAND`` is specified they will be executed in order,
@@ -111,6 +108,9 @@ The options are:
an ``OUTPUT`` of another custom command in the same directory
(``CMakeLists.txt`` file) CMake automatically brings the other
custom command into the target in which this command is built.
A target-level dependency is added if any dependency is listed as
``BYPRODUCTS`` of a target or any of its build events in the same
directory to ensure the byproducts will be available.
If ``DEPENDS`` is not specified the command will run whenever
the ``OUTPUT`` is missing; if the command does not actually
create the ``OUTPUT`` then the rule will always run.

6
Help/command/add_custom_target.rst
View File

@@ -49,9 +49,6 @@ The options are:
order-only dependencies to ensure the byproducts will be
available before their dependents build.
The ``BYPRODUCTS`` option is ignored on non-Ninja generators
except to mark byproducts ``GENERATED``.
``COMMAND``
Specify the command-line(s) to execute at build time.
If more than one ``COMMAND`` is specified they will be executed in order,
@@ -86,6 +83,9 @@ The options are:
:command:`add_custom_command` command calls in the same directory
(``CMakeLists.txt`` file). They will be brought up to date when
the target is built.
A target-level dependency is added if any dependency is a byproduct
of a target or any of its build events in the same directory to ensure
the byproducts will be available before this target is built.
Use the :command:`add_dependencies` command to add dependencies
on other targets.