CheckVariableExistsΒΆ
Check if the variable exists.
CHECK_VARIABLE_EXISTS(VAR VARIABLE)
VAR - the name of the variable
VARIABLE - variable to store the result
Will be created as an internal cache variable.
This macro is only for C variables.
The following variables may be set before calling this macro to modify the way the check is run:
CMAKE_REQUIRED_FLAGS = string of compile command line flags
CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
CMAKE_REQUIRED_LIBRARIES = list of libraries to link
CMAKE_REQUIRED_QUIET = execute quietly without messages