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1#***************************************************************************
2#                                  _   _ ____  _
3#  Project                     ___| | | |  _ \| |
4#                             / __| | | | |_) | |
5#                            | (__| |_| |  _ <| |___
6#                             \___|\___/|_| \_\_____|
7#
8# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9#
10# This software is licensed as described in the file COPYING, which
11# you should have received as part of this distribution. The terms
12# are also available at https://curl.se/docs/copyright.html.
13#
14# You may opt to use, copy, modify, merge, publish, distribute and/or sell
15# copies of the Software, and permit persons to whom the Software is
16# furnished to do so, under the terms of the COPYING file.
17#
18# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19# KIND, either express or implied.
20#
21# SPDX-License-Identifier: curl
22#
23###########################################################################
24
25#[=======================================================================[.rst:
26FindNGTCP2
27----------
28
29Find the ngtcp2 library
30
31This module accepts optional COMPONENTS to control the crypto library (these are
32mutually exclusive)::
33
34  OpenSSL:  Use libngtcp2_crypto_openssl
35  GnuTLS:   Use libngtcp2_crypto_gnutls
36
37Result Variables
38^^^^^^^^^^^^^^^^
39
40``NGTCP2_FOUND``
41  System has ngtcp2
42``NGTCP2_INCLUDE_DIRS``
43  The ngtcp2 include directories.
44``NGTCP2_LIBRARIES``
45  The libraries needed to use ngtcp2
46``NGTCP2_VERSION``
47  version of ngtcp2.
48#]=======================================================================]
49
50if(UNIX)
51  find_package(PkgConfig QUIET)
52  pkg_search_module(PC_NGTCP2 libngtcp2)
53endif()
54
55find_path(NGTCP2_INCLUDE_DIR ngtcp2/ngtcp2.h
56  HINTS
57    ${PC_NGTCP2_INCLUDEDIR}
58    ${PC_NGTCP2_INCLUDE_DIRS}
59)
60
61find_library(NGTCP2_LIBRARY NAMES ngtcp2
62  HINTS
63    ${PC_NGTCP2_LIBDIR}
64    ${PC_NGTCP2_LIBRARY_DIRS}
65)
66
67if(PC_NGTCP2_VERSION)
68  set(NGTCP2_VERSION ${PC_NGTCP2_VERSION})
69endif()
70
71if(NGTCP2_FIND_COMPONENTS)
72  set(NGTCP2_CRYPTO_BACKEND "")
73  foreach(component IN LISTS NGTCP2_FIND_COMPONENTS)
74    if(component MATCHES "^(BoringSSL|OpenSSL|wolfSSL|GnuTLS)")
75      if(NGTCP2_CRYPTO_BACKEND)
76        message(FATAL_ERROR "NGTCP2: Only one crypto library can be selected")
77      endif()
78      set(NGTCP2_CRYPTO_BACKEND ${component})
79    endif()
80  endforeach()
81
82  if(NGTCP2_CRYPTO_BACKEND)
83    string(TOLOWER "ngtcp2_crypto_${NGTCP2_CRYPTO_BACKEND}" _crypto_library)
84    if(UNIX)
85      pkg_search_module(PC_${_crypto_library} lib${_crypto_library})
86    endif()
87    find_library(${_crypto_library}_LIBRARY
88      NAMES
89        ${_crypto_library}
90      HINTS
91        ${PC_${_crypto_library}_LIBDIR}
92        ${PC_${_crypto_library}_LIBRARY_DIRS}
93    )
94    if(${_crypto_library}_LIBRARY)
95      set(NGTCP2_${NGTCP2_CRYPTO_BACKEND}_FOUND TRUE)
96      set(NGTCP2_CRYPTO_LIBRARY ${${_crypto_library}_LIBRARY})
97    endif()
98  endif()
99endif()
100
101include(FindPackageHandleStandardArgs)
102find_package_handle_standard_args(NGTCP2
103  REQUIRED_VARS
104    NGTCP2_LIBRARY
105    NGTCP2_INCLUDE_DIR
106  VERSION_VAR NGTCP2_VERSION
107  HANDLE_COMPONENTS
108)
109
110if(NGTCP2_FOUND)
111  set(NGTCP2_LIBRARIES    ${NGTCP2_LIBRARY} ${NGTCP2_CRYPTO_LIBRARY})
112  set(NGTCP2_INCLUDE_DIRS ${NGTCP2_INCLUDE_DIR})
113endif()
114
115mark_as_advanced(NGTCP2_INCLUDE_DIRS NGTCP2_LIBRARIES)
116