# - Try to find gnutls
# Once done this will define
#
# GNUTLS_FOUND - system has gnutls
# GNUTLS_INCLUDE_DIRS - the gnutls include directory
# GNUTLS_LIBRARIES - The gnutls libraries

# Suppress PkgConfig Mismatch warning, see https://cmake.org/cmake/help/latest/module/FindPackageHandleStandardArgs.html
set(FPHSA_NAME_MISMATCHED 1)
include(FindPkgConfig)
find_package(PkgConfig QUIET)
unset(FPHSA_NAME_MISMATCHED)

if(PKG_CONFIG_FOUND)
  pkg_check_modules(GNUTLS gnutls QUIET)
endif()

if(NOT GNUTLS_FOUND)
  find_path(GNUTLS_INCLUDE_DIRS gnutls/gnutls.h)
  find_library(GNUTLS_LIBRARIES gnutls)
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GnuTLS DEFAULT_MSG GNUTLS_INCLUDE_DIRS GNUTLS_LIBRARIES)

if(GNUTLS_FOUND)
  list(APPEND GNUTLS_DEFINITIONS -DHAVE_GNUTLS=1)
else()
  if(GNUTLS_FIND_REQUIRED)
    message(FATAL_ERROR "GNUTLS Not Found.")
  endif()
endif()

mark_as_advanced(GNUTLS_INCLUDE_DIRS GNUTLS_LIBRARIES GNUTLS_DEFINITIONS)