CheckIncludeFile

Provides a macro to check if a header file can be included in C.

CHECK_INCLUDE_FILE

CHECK_INCLUDE_FILE(<include> <variable> [<flags>])

Check if the given <include> file may be included in a C source file and store the result in an internal cache entry named <variable>. The optional third argument may be used to add compilation flags to the check (or use CMAKE_REQUIRED_FLAGS below).

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_INCLUDES

list of include directories

CMAKE_REQUIRED_QUIET

execute quietly without messages

See the CheckIncludeFiles module to check for multiple headers at once. See the CheckIncludeFileCXX module to check for headers using the CXX language.