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Diffstat (limited to 'Help/command/add_compile_options.rst')
| -rw-r--r-- | Help/command/add_compile_options.rst | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/Help/command/add_compile_options.rst b/Help/command/add_compile_options.rst index 3fe2a3330..43805c3a9 100644 --- a/Help/command/add_compile_options.rst +++ b/Help/command/add_compile_options.rst @@ -1,23 +1,48 @@ add_compile_options ------------------- -Adds options to the compilation of source files. +Add options to the compilation of source files. -:: +.. code-block:: cmake add_compile_options(<option> ...) -Adds options to the compiler command line for targets in the current -directory and below that are added after this command is invoked. -See documentation of the :prop_dir:`directory <COMPILE_OPTIONS>` and -:prop_tgt:`target <COMPILE_OPTIONS>` ``COMPILE_OPTIONS`` properties. +Adds options to the :prop_dir:`COMPILE_OPTIONS` directory property. +These options are used when compiling targets from the current +directory and below. -This command can be used to add any options, but alternative commands -exist to add preprocessor definitions (:command:`target_compile_definitions` -and :command:`add_definitions`) or include directories -(:command:`target_include_directories` and :command:`include_directories`). +Arguments +^^^^^^^^^ Arguments to ``add_compile_options`` may use "generator expressions" with the syntax ``$<...>``. See the :manual:`cmake-generator-expressions(7)` manual for available expressions. See the :manual:`cmake-buildsystem(7)` manual for more on defining buildsystem properties. + +.. include:: OPTIONS_SHELL.txt + +Example +^^^^^^^ + +Since different compilers support different options, a typical use of +this command is in a compiler-specific conditional clause: + +.. code-block:: cmake + + if (MSVC) + # warning level 4 and all warnings as errors + add_compile_options(/W4 /WX) + else() + # lots of warnings and all warnings as errors + add_compile_options(-Wall -Wextra -pedantic -Werror) + endif() + +See Also +^^^^^^^^ + +This command can be used to add any options. However, for +adding preprocessor definitions and include directories it is recommended +to use the more specific commands :command:`add_compile_definitions` +and :command:`include_directories`. + +The command :command:`target_compile_options` adds target-specific options. |