cmake/Modules/Findlibffi.cmake

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# under the License.

# - Try to find libffi define the variables for the binaries/headers and include 
#
# Once done this will define
#  libffi_FOUND - System has libffi
#  libffi::libffi - Imported target for the libffi

find_library(FFI_LIBRARY NAMES ffi libffi
    PATHS $ENV{FFI_DIR} ${FFI_DIR} /usr/local/opt/libffi /opt/local /usr /usr/local
    PATH_SUFFIXES lib lib64 x86_64-linux-gnu lib/x86_64-linux-gnu
    HINTS ${PC_LIBFFI_LIBDIR} ${PC_LIBFFI_LIBRARY_DIRS}
)

find_path(FFI_INCLUDE_DIR ffi.h
     PATHS $ENV{FFI_DIR} ${FFI_DIR} /usr/local/opt/libffi /opt/local /usr /usr/local
     PATH_SUFFIXES include include/ffi include/x86_64-linux-gnu x86_64-linux-gnu
     HINTS ${PC_LIBFFI_INCLUDEDIR} ${PC_LIBFFI_INCLUDE_DIRS}
)

include(FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set libffi_FOUND to TRUE
# if all listed variables are TRUE
find_package_handle_standard_args(libffi DEFAULT_MSG
                                  FFI_LIBRARY FFI_INCLUDE_DIR)
mark_as_advanced(FFI_INCLUDE_DIR FFI_LIBRARY)

set(FFI_LIBRARIES ${FFI_LIBRARY})
set(FFI_INCLUDE_DIRS ${FFI_INCLUDE_DIR})


if(libffi_FOUND AND NOT TARGET libffi::libffi)
    add_library(libffi::libffi SHARED IMPORTED)
    set_target_properties(libffi::libffi PROPERTIES
            IMPORTED_LOCATION "${FFI_LIBRARY}"
            INTERFACE_INCLUDE_DIRECTORIES "${FFI_INCLUDE_DIR}"
    )

endif()