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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# Find the GnuTLS library
#
# Input variables:
#
# - `GNUTLS_INCLUDE_DIR`: Absolute path to GnuTLS include directory.
# - `GNUTLS_LIBRARY`: Absolute path to `gnutls` library.
#
# Defines:
#
# - `GNUTLS_FOUND`: System has GnuTLS.
# - `GNUTLS_VERSION`: Version of GnuTLS.
# - `CURL::gnutls`: GnuTLS library target.
set(_gnutls_pc_requires "gnutls")
if(CURL_USE_PKGCONFIG AND
NOT DEFINED GNUTLS_INCLUDE_DIR AND
NOT DEFINED GNUTLS_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(_gnutls ${_gnutls_pc_requires})
endif()
if(_gnutls_FOUND)
set(GnuTLS_FOUND TRUE)
set(GNUTLS_FOUND TRUE)
set(GNUTLS_VERSION ${_gnutls_VERSION})
message(STATUS "Found GnuTLS (via pkg-config): ${_gnutls_INCLUDE_DIRS} (found version \"${GNUTLS_VERSION}\")")
else()
find_path(GNUTLS_INCLUDE_DIR NAMES "gnutls/gnutls.h")
find_library(GNUTLS_LIBRARY NAMES "gnutls" "libgnutls")
unset(GNUTLS_VERSION CACHE)
if(GNUTLS_INCLUDE_DIR AND EXISTS "${GNUTLS_INCLUDE_DIR}/gnutls/gnutls.h")
set(_version_regex "#[\t ]*define[\t ]+GNUTLS_VERSION[\t ]+\"([^\"]*)\"")
file(STRINGS "${GNUTLS_INCLUDE_DIR}/gnutls/gnutls.h" _version_str REGEX "${_version_regex}")
string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
set(GNUTLS_VERSION "${_version_str}")
unset(_version_regex)
unset(_version_str)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GnuTLS
REQUIRED_VARS
GNUTLS_INCLUDE_DIR
GNUTLS_LIBRARY
VERSION_VAR
GNUTLS_VERSION
)
if(GNUTLS_FOUND)
set(_gnutls_INCLUDE_DIRS ${GNUTLS_INCLUDE_DIR})
set(_gnutls_LIBRARIES ${GNUTLS_LIBRARY})
endif()
mark_as_advanced(GNUTLS_INCLUDE_DIR GNUTLS_LIBRARY)
endif()
if(GNUTLS_FOUND)
if(CMAKE_VERSION VERSION_LESS 3.13)
link_directories(${_gnutls_LIBRARY_DIRS})
endif()
if(NOT TARGET CURL::gnutls)
add_library(CURL::gnutls INTERFACE IMPORTED)
set_target_properties(CURL::gnutls PROPERTIES
INTERFACE_LIBCURL_PC_MODULES "${_gnutls_pc_requires}"
INTERFACE_COMPILE_OPTIONS "${_gnutls_CFLAGS}"
INTERFACE_INCLUDE_DIRECTORIES "${_gnutls_INCLUDE_DIRS}"
INTERFACE_LINK_DIRECTORIES "${_gnutls_LIBRARY_DIRS}"
INTERFACE_LINK_LIBRARIES "${_gnutls_LIBRARIES}")
endif()
endif()
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