CheckSourceRuns¶
New in version 3.19.
Check if given source compiles and links into an executable and can subsequently be run.
- check_source_runs¶
- check_source_runs(<lang> <code> <resultVar> [SRC_EXT <extension>]) - Check that the source supplied in - <code>can be compiled as a source file for the requested language, linked as an executable and then run. The- <code>must contain at least a- main()function. If the- <code>could be built and run successfully, the internal cache variable specified by- <resultVar>will be set to 1, otherwise it will be set to an value that evaluates to boolean false (e.g. an empty string or an error message).- By default, the test source file will be given a file extension that matches the requested language. The - SRC_EXToption can be used to override this with- .<extension>instead.- The underlying check is performed by the - try_run()command. The compile and link commands can be influenced by setting any of the following variables prior to calling- check_objc_source_runs():- CMAKE_REQUIRED_FLAGS
- Additional flags to pass to the compiler. Note that the contents of - CMAKE_OBJC_FLAGSand its associated configuration-specific variable are automatically added to the compiler command before the contents of- CMAKE_REQUIRED_FLAGS.
- CMAKE_REQUIRED_DEFINITIONS
- A ;-list of compiler definitions of the form - -DFOOor- -DFOO=bar. A definition for the name specified by- <resultVar>will also be added automatically.
- CMAKE_REQUIRED_INCLUDES
- A ;-list of header search paths to pass to the compiler. These will be the only header search paths used by - try_run(), i.e. the contents of the- INCLUDE_DIRECTORIESdirectory property will be ignored.
- CMAKE_REQUIRED_LINK_OPTIONS
- A ;-list of options to add to the link command (see - try_run()for further details).
- CMAKE_REQUIRED_LIBRARIES
- A ;-list of libraries to add to the link command. These can be the name of system libraries or they can be Imported Targets (see - try_run()for further details).
- CMAKE_REQUIRED_QUIET
- If this variable evaluates to a boolean true value, all status messages associated with the check will be suppressed. 
 - The check is only performed once, with the result cached in the variable named by - <resultVar>. Every subsequent CMake run will re-use this cached value rather than performing the check again, even if the- <code>changes. In order to force the check to be re-evaluated, the variable named by- <resultVar>must be manually removed from the cache.
