curl/CMake/FindNGTCP2.cmake
Don 7f8b36b074
cmake: support ngtcp2 boringssl backend
Update the ngtcp2 find module to detect the boringssl backend. Determine
if the underlying OpenSSL implementation is BoringSSL and if so use that
as the ngtcp2 backend.

Reviewed-by: Jakub Zakrzewski
Closes #9065
2022-07-05 10:09:40 +02:00

116 lines
3.3 KiB
CMake

#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2022, 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
#
###########################################################################
#[=======================================================================[.rst:
FindNGTCP2
----------
Find the ngtcp2 library
This module accepts optional COMPONENTS to control the crypto library (these are
mutually exclusive)::
OpenSSL: Use libngtcp2_crypto_openssl
GnuTLS: Use libngtcp2_crypto_gnutls
Result Variables
^^^^^^^^^^^^^^^^
``NGTCP2_FOUND``
System has ngtcp2
``NGTCP2_INCLUDE_DIRS``
The ngtcp2 include directories.
``NGTCP2_LIBRARIES``
The libraries needed to use ngtcp2
``NGTCP2_VERSION``
version of ngtcp2.
#]=======================================================================]
if(UNIX)
find_package(PkgConfig QUIET)
pkg_search_module(PC_NGTCP2 libngtcp2)
endif()
find_path(NGTCP2_INCLUDE_DIR ngtcp2/ngtcp2.h
HINTS
${PC_NGTCP2_INCLUDEDIR}
${PC_NGTCP2_INCLUDE_DIRS}
)
find_library(NGTCP2_LIBRARY NAMES ngtcp2
HINTS
${PC_NGTCP2_LIBDIR}
${PC_NGTCP2_LIBRARY_DIRS}
)
if(PC_NGTCP2_VERSION)
set(NGTCP2_VERSION ${PC_NGTCP2_VERSION})
endif()
if(NGTCP2_FIND_COMPONENTS)
set(NGTCP2_CRYPTO_BACKEND "")
foreach(component IN LISTS NGTCP2_FIND_COMPONENTS)
if(component MATCHES "^(BoringSSL|OpenSSL|GnuTLS)")
if(NGTCP2_CRYPTO_BACKEND)
message(FATAL_ERROR "NGTCP2: Only one crypto library can be selected")
endif()
set(NGTCP2_CRYPTO_BACKEND ${component})
endif()
endforeach()
if(NGTCP2_CRYPTO_BACKEND)
string(TOLOWER "ngtcp2_crypto_${NGTCP2_CRYPTO_BACKEND}" _crypto_library)
if(UNIX)
pkg_search_module(PC_${_crypto_library} lib${_crypto_library})
endif()
find_library(${_crypto_library}_LIBRARY
NAMES
${_crypto_library}
HINTS
${PC_${_crypto_library}_LIBDIR}
${PC_${_crypto_library}_LIBRARY_DIRS}
)
if(${_crypto_library}_LIBRARY)
set(NGTCP2_${NGTCP2_CRYPTO_BACKEND}_FOUND TRUE)
set(NGTCP2_CRYPTO_LIBRARY ${${_crypto_library}_LIBRARY})
endif()
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(NGTCP2
REQUIRED_VARS
NGTCP2_LIBRARY
NGTCP2_INCLUDE_DIR
VERSION_VAR NGTCP2_VERSION
HANDLE_COMPONENTS
)
if(NGTCP2_FOUND)
set(NGTCP2_LIBRARIES ${NGTCP2_LIBRARY} ${NGTCP2_CRYPTO_LIBRARY})
set(NGTCP2_INCLUDE_DIRS ${NGTCP2_INCLUDE_DIR})
endif()
mark_as_advanced(NGTCP2_INCLUDE_DIRS NGTCP2_LIBRARIES)