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INCLUDE( FindPkgConfig )
 
IF ( GNUTLS_FIND_REQUIRED )
  SET( _pkgconfig_REQUIRED "REQUIRED" )
ELSE( GNUTLS_FIND_REQUIRED )
  SET( _pkgconfig_REQUIRED "" )  
ENDIF ( GNUTLS_FIND_REQUIRED )
 
IF ( GNUTLS_MIN_VERSION )
  PKG_SEARCH_MODULE( GNUTLS ${_pkgconfig_REQUIRED} gnutls>=${GNUTLS_MIN_VERSION} )
ELSE ( GNUTLS_MIN_VERSION )
  PKG_SEARCH_MODULE( GNUTLS ${_pkgconfig_REQUIRED} gnutls )
ENDIF ( GNUTLS_MIN_VERSION )
 
 
IF( NOT GNUTLS_FOUND AND NOT PKG_CONFIG_FOUND )
  FIND_PATH( GNUTLS_INCLUDE_DIRS gnutls/gnutls.h )
  FIND_LIBRARY( GNUTLS_LIBRARIES gnutls)
 
  # Report results
  IF ( GNUTLS_LIBRARIES AND GNUTLS_INCLUDE_DIRS )  
    SET( GNUTLS_FOUND 1 )
    IF ( NOT GNUTLS_FIND_QUIETLY )
      MESSAGE( STATUS "Found gnutls: ${GNUTLS_LIBRARIES}" )
    ENDIF ( NOT GNUTLS_FIND_QUIETLY )
  ELSE ( GNUTLS_LIBRARIES AND GNUTLS_INCLUDE_DIRS )  
    IF ( GNUTLS_FIND_REQUIRED )
      MESSAGE( SEND_ERROR "Could NOT find gnutls" )
    ELSE ( GNUTLS_FIND_REQUIRED )
      IF ( NOT GNUTLS_FIND_QUIETLY )
        MESSAGE( STATUS "Could NOT find gnutls" )  
      ENDIF ( NOT GNUTLS_FIND_QUIETLY )
    ENDIF ( GNUTLS_FIND_REQUIRED )
  ENDIF ( GNUTLS_LIBRARIES AND GNUTLS_INCLUDE_DIRS )
ENDIF( NOT GNUTLS_FOUND AND NOT PKG_CONFIG_FOUND )
 
MARK_AS_ADVANCED( GNUTLS_LIBRARIES GNUTLS_INCLUDE_DIRS )