Added in version 3.16.
Check once if Objective-C source can be built.
check_objc_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]])
Check once that the source supplied in <code> can be built. The result is
stored in the internal cache variable specified by <resultVar>, with
boolean true for success and boolean false for failure.
If FAIL_REGEX is provided, then failure is determined by checking
if anything in the compiler output matches any of the specified regular
expressions.
Internally, try_compile() is used to compile the source. If
CMAKE_TRY_COMPILE_TARGET_TYPE is set to EXECUTABLE (default),
the source is compiled and linked as an executable program. If set to
STATIC_LIBRARY, the source is compiled but not linked. In any case, all
functions must be declared as usual.
See also check_source_compiles() for a more general command syntax.
See also check_source_runs() to run compiled source.
The compile and link commands can be influenced by setting any of the
following variables prior to calling check_objc_source_compiles()
CMAKE_REQUIRED_FLAGSString of additional flags to pass to the compiler. The string must be space-delimited--a ;-list will not work. The contents of
CMAKE_<LANG>_FLAGSand its associated configuration-specific variable are automatically added to the compiler command before the contents ofCMAKE_REQUIRED_FLAGS.
CMAKE_REQUIRED_DEFINITIONSA ;-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_INCLUDESA ;-list of header search paths to pass to the compiler. These will be the only header search paths used--the contents of the
INCLUDE_DIRECTORIESdirectory property will be ignored.
CMAKE_REQUIRED_LINK_OPTIONSAdded in version 3.14.
A ;-list of options to add to the link command (see
try_compile()for further details).
CMAKE_REQUIRED_LIBRARIESA ;-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_compile()for further details).
CMAKE_REQUIRED_LINK_DIRECTORIESAdded in version 3.31.
A ;-list of libraries search paths to pass to the linker (see
try_compile()for further details).
CMAKE_REQUIRED_QUIETAdded in version 3.1.
If this variable evaluates to a boolean true value, all status messages associated with the check will be suppressed.