# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindGnuTLS
----------

Find the GNU Transport Layer Security library (gnutls)


Once done this will define

::

  GNUTLS_FOUND - System has gnutls
  GNUTLS_INCLUDE_DIR - The gnutls include directory
  GNUTLS_LIBRARIES - The libraries needed to use gnutls
  GNUTLS_DEFINITIONS - Compiler switches required for using gnutls
#]=======================================================================]

# Note that this doesn't try to find the gnutls-extra package.


if (GNUTLS_INCLUDE_DIR AND GNUTLS_LIBRARY)
  # in cache already
  set(gnutls_FIND_QUIETLY TRUE)
endif ()

if (NOT WIN32)
  # try using pkg-config to get the directories and then use these values
  # in the find_path() and find_library() calls
  # also fills in GNUTLS_DEFINITIONS, although that isn't normally useful
  find_package(PkgConfig QUIET)
  PKG_CHECK_MODULES(PC_GNUTLS QUIET gnutls)
  set(GNUTLS_DEFINITIONS ${PC_GNUTLS_CFLAGS_OTHER})
  set(GNUTLS_VERSION_STRING ${PC_GNUTLS_VERSION})
endif ()

find_path(GNUTLS_INCLUDE_DIR gnutls/gnutls.h
  HINTS
    ${PC_GNUTLS_INCLUDEDIR}
    ${PC_GNUTLS_INCLUDE_DIRS}
  )

find_library(GNUTLS_LIBRARY NAMES gnutls libgnutls
  HINTS
    ${PC_GNUTLS_LIBDIR}
    ${PC_GNUTLS_LIBRARY_DIRS}
  )

mark_as_advanced(GNUTLS_INCLUDE_DIR GNUTLS_LIBRARY)

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GnuTLS
                                  REQUIRED_VARS GNUTLS_LIBRARY GNUTLS_INCLUDE_DIR
                                  VERSION_VAR GNUTLS_VERSION_STRING)

if(GNUTLS_FOUND)
  set(GNUTLS_LIBRARIES    ${GNUTLS_LIBRARY})
  set(GNUTLS_INCLUDE_DIRS ${GNUTLS_INCLUDE_DIR})
endif()