curl/CMake/FindNGTCP2.cmake
Viktor Szakats 8498b1b953
cmake/FindNGTCP2: use library path as hint for finding the crypto module
It allows finding the ngtcp2 crypto interface library automatically when
using a custom `NGTCP2_LIBRARY`.

Before this patch the library location had to be added via
`CMAKE_LIBRARY_PATH` or by other means.

Also add empty lines for readability / uniformity.

Fixes 8b8909e120/curl.sh (L289)
Closes #14905
2024-09-19 15:56:30 +02:00

123 lines
3.9 KiB
CMake

#***************************************************************************
# _ _ ____ _
# 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
#
# 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_VERSION Version of ngtcp2
if(CURL_USE_PKGCONFIG)
find_package(PkgConfig QUIET)
pkg_check_modules(PC_NGTCP2 "libngtcp2")
endif()
find_path(NGTCP2_INCLUDE_DIR NAMES "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 ${PC_NGTCP2_VERSION})
elseif(NGTCP2_INCLUDE_DIR AND EXISTS "${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_FIND_COMPONENTS)
set(_ngtcp2_crypto_backend "")
foreach(_component IN LISTS NGTCP2_FIND_COMPONENTS)
if(_component MATCHES "^(BoringSSL|quictls|wolfSSL|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(CURL_USE_PKGCONFIG)
pkg_check_modules(PC_${_crypto_library} "lib${_crypto_library}")
endif()
get_filename_component(_ngtcp2_library_dir "${NGTCP2_LIBRARY}" DIRECTORY)
find_library(${_crypto_library}_LIBRARY NAMES ${_crypto_library}
HINTS
${_ngtcp2_library_dir}
${PC_${_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_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)