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Help: clarify add_definitions() and add_compile_definitions() behavior

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Fixes: #20736
This commit is contained in:
Marc Chevrier 2020-05-24 12:47:24 +02:00
parent 0781540a80
commit b3e4fb5144
2 changed files with 9 additions and 7 deletions
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10
Help/command/add_compile_definitions.rst
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@ -7,10 +7,12 @@ Add preprocessor definitions to the compilation of source files.
add_compile_definitions(<definition> ...)
Adds preprocessor definitions to the compiler command line for targets in the
current directory and below (whether added before or after this command is
invoked). See documentation of the :prop_dir:`directory <COMPILE_DEFINITIONS>`
and :prop_tgt:`target <COMPILE_DEFINITIONS>` ``COMPILE_DEFINITIONS`` properties.
Adds preprocessor definitions to the compiler command line.
The preprocessor definitions are added to the :prop_dir:`COMPILE_DEFINITIONS`
directory property for the current ``CMakeLists`` file. They are also added to
the :prop_tgt:`COMPILE_DEFINITIONS` target property for each target in the
current ``CMakeLists`` file.
Definitions are specified using the syntax ``VAR`` or ``VAR=value``.
Function-style definitions are not supported. CMake will automatically

6
Help/command/add_definitions.rst
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@ -8,9 +8,9 @@ Add -D define flags to the compilation of source files.
add_definitions(-DFOO -DBAR ...)
Adds definitions to the compiler command line for targets in the current
directory and below (whether added before or after this command is invoked).
This command can be used to add any flags, but it is intended to add
preprocessor definitions.
directory, whether added before or after this command is invoked, and for
the ones in sub-directories added after. This command can be used to add any
flags, but it is intended to add preprocessor definitions.
.. note::