curl/CMake/FindNGTCP2.cmake
Viktor Szakats b910122fe3
cmake: add CURL_USE_PKGCONFIG option
Add option to control whether to use `pkg-config` to detect
dependencies. Curl's CMake uses `pkg-config` by default for all targets
except for MSVC without vcpkg.

With the CMake option `-DCURL_USE_PKGCONFIG=ON` you can override it to
use `pkg-config` always.

If `pkg-config` is causing issues, e.g. in cross-builds or other cases,
`-DCURL_USE_PKGCONFIG=OFF` disables all use of `pkg-config`.

Also add it to `curl-config.cmake`. Not yet used, but will be once curl
starts referencing any curl-specific `Find*` module from this public
script.

Follow-up to 9dfdc6ff42 #14483
Closes #14504
2024-08-13 09:28:27 +02:00

107 lines
3.3 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, LibreSSL: Use libngtcp2_crypto_quictls
# BoringSSL, AWS-LC: Use libngtcp2_crypto_boringssl
# wolfSSL: Use libngtcp2_crypto_wolfssl
# 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(CURL_USE_PKGCONFIG)
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|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_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_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_DIRS NGTCP2_LIBRARIES)