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Help: Reference add_compile_options from add_definitions (#15225) 

When we explain in add_definitions documentation that it is intended
only for preprocessor definitions, link to add_compile_options for
adding other flags.  Also explicitly mention that the order of
add_definitions calls with respect to target creation does not matter.
This differs from the behavior now explicitly stated in the
documentation of add_compile_options.
This commit is contained in:
Brad King 2014-10-29 15:21:16 -04:00
parent a9f8c50aa2
commit 352cbb6e36
1 changed files with 6 additions and 4 deletions
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10
Help/command/add_definitions.rst
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@ -7,10 +7,12 @@ Adds -D define flags to the compilation of source files.
add_definitions(-DFOO -DBAR ...) add_definitions(-DFOO -DBAR ...)
Adds definitions to the compiler command line for sources in the current Adds definitions to the compiler command line for targets in the current
directory and below. This command can be used to add any flags, but directory and below (whether added before or after this command is invoked).
it is intended to add preprocessor definitions. Flags This command can be used to add any flags, but it is intended to add
beginning in -D or /D that look like preprocessor definitions are preprocessor definitions (see the :command:`add_compile_options` command
to add other flags).
Flags beginning in -D or /D that look like preprocessor definitions are
automatically added to the :prop_dir:`COMPILE_DEFINITIONS` directory automatically added to the :prop_dir:`COMPILE_DEFINITIONS` directory
property for the current directory. Definitions with non-trivial values property for the current directory. Definitions with non-trivial values
may be left in the set of flags instead of being converted for reasons of may be left in the set of flags instead of being converted for reasons of