/CMake 3.19


Provides a macro to check if a list of one or more header files can be included together.

CHECK_INCLUDE_FILES("<includes>" <variable> [LANGUAGE <language>])

Check if the given <includes> list may be included together in a source file and store the result in an internal cache entry named <variable>. Specify the <includes> argument as a ;-list of header file names.

If LANGUAGE is set, the specified compiler will be used to perform the check. Acceptable values are C and CXX. If not set, the C compiler will be used if enabled. If the C compiler is not enabled, the C++ compiler will be used if enabled.

The following variables may be set before calling this macro to modify the way the check is run:


string of compile command line flags.


a ;-list of macros to define (-DFOO=bar).


a ;-list of header search paths to pass to the compiler.


a ;-list of options to add to the link command.


a ;-list of libraries to add to the link command. See policy CMP0075.


execute quietly without messages.

See modules CheckIncludeFile and CheckIncludeFileCXX to check for a single header file in C or CXX languages.

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