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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 ngtcp2 library
#
# This module accepts optional COMPONENTS to control the crypto library (these are
# mutually exclusive):
#
# - quictls: Use `libngtcp2_crypto_quictls`. (choose this for LibreSSL)
# - BoringSSL: Use `libngtcp2_crypto_boringssl`. (choose this for AWS-LC)
# - wolfSSL: Use `libngtcp2_crypto_wolfssl`.
# - GnuTLS: Use `libngtcp2_crypto_gnutls`.
# - ossl: Use `libngtcp2_crypto_ossl`.
#
# Input variables:
#
# - `NGTCP2_INCLUDE_DIR`: The ngtcp2 include directory.
# - `NGTCP2_LIBRARY`: Path to `ngtcp2` library.
#
# Result variables:
#
# - `NGTCP2_FOUND`: System has ngtcp2.
# - `NGTCP2_INCLUDE_DIRS`: The ngtcp2 include directories.
# - `NGTCP2_LIBRARIES`: The ngtcp2 library names.
# - `NGTCP2_LIBRARY_DIRS`: The ngtcp2 library directories.
# - `NGTCP2_PC_REQUIRES`: The ngtcp2 pkg-config packages.
# - `NGTCP2_CFLAGS`: Required compiler flags.
# - `NGTCP2_VERSION`: Version of ngtcp2.
if(NGTCP2_FIND_COMPONENTS)
set(_ngtcp2_crypto_backend "")
foreach(_component IN LISTS NGTCP2_FIND_COMPONENTS)
if(_component MATCHES "^(BoringSSL|quictls|wolfSSL|GnuTLS|ossl)")
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_lower)
string(TOUPPER "ngtcp2_crypto_${_ngtcp2_crypto_backend}" _crypto_library_upper)
endif()
endif()
set(NGTCP2_PC_REQUIRES "libngtcp2")
if(_ngtcp2_crypto_backend)
list(APPEND NGTCP2_PC_REQUIRES "lib${_crypto_library_lower}")
endif()
if(CURL_USE_PKGCONFIG AND
NOT DEFINED NGTCP2_INCLUDE_DIR AND
NOT DEFINED NGTCP2_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(NGTCP2 ${NGTCP2_PC_REQUIRES})
endif()
if(NGTCP2_FOUND)
set(NGTCP2_VERSION "${NGTCP2_libngtcp2_VERSION}")
string(REPLACE ";" " " NGTCP2_CFLAGS "${NGTCP2_CFLAGS}")
message(STATUS "Found NGTCP2 (via pkg-config): ${NGTCP2_INCLUDE_DIRS} (found version \"${NGTCP2_VERSION}\")")
else()
find_path(NGTCP2_INCLUDE_DIR NAMES "ngtcp2/ngtcp2.h")
find_library(NGTCP2_LIBRARY NAMES "ngtcp2")
unset(NGTCP2_VERSION CACHE)
if(NGTCP2_INCLUDE_DIR AND EXISTS "${NGTCP2_INCLUDE_DIR}/ngtcp2/version.h")
set(_version_regex "#[\t ]*define[\t ]+NGTCP2_VERSION[\t ]+\"([^\"]*)\"")
file(STRINGS "${NGTCP2_INCLUDE_DIR}/ngtcp2/version.h" _version_str REGEX "${_version_regex}")
string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
set(NGTCP2_VERSION "${_version_str}")
unset(_version_regex)
unset(_version_str)
endif()
if(_ngtcp2_crypto_backend)
get_filename_component(_ngtcp2_library_dir "${NGTCP2_LIBRARY}" DIRECTORY)
find_library(${_crypto_library_upper}_LIBRARY NAMES ${_crypto_library_lower} HINTS ${_ngtcp2_library_dir})
if(${_crypto_library_upper}_LIBRARY)
set(NGTCP2_${_ngtcp2_crypto_backend}_FOUND TRUE)
set(NGTCP2_CRYPTO_LIBRARY ${${_crypto_library_upper}_LIBRARY})
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(NGTCP2
REQUIRED_VARS
NGTCP2_INCLUDE_DIR
NGTCP2_LIBRARY
VERSION_VAR
NGTCP2_VERSION
HANDLE_COMPONENTS
)
if(NGTCP2_FOUND)
set(NGTCP2_INCLUDE_DIRS ${NGTCP2_INCLUDE_DIR})
set(NGTCP2_LIBRARIES ${NGTCP2_LIBRARY} ${NGTCP2_CRYPTO_LIBRARY})
endif()
mark_as_advanced(NGTCP2_INCLUDE_DIR NGTCP2_LIBRARY NGTCP2_CRYPTO_LIBRARY)
endif()
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