Utilities/cmcurl/CMake/FindNGTCP2.cmake

   1 #***************************************************************************
   2 #                                  _   _ ____  _
   3 #  Project                     ___| | | |  _ \| |
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   6 #                             \___|\___/|_| \_\_____|
   7 #
   8 # Copyright (C) 1998 - 2020, 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 ###########################################################################
  22
  23 #[=======================================================================[.rst:
  24 FindNGTCP2
  25 ----------
  26
  27 Find the ngtcp2 library
  28
  29 This module accepts optional COMPONENTS to control the crypto library (these are
  30 mutually exclusive)::
  31
  32   OpenSSL:  Use libngtcp2_crypto_openssl
  33   GnuTLS:   Use libngtcp2_crypto_gnutls
  34
  35 Result Variables
  36 ^^^^^^^^^^^^^^^^
  37
  38 ``NGTCP2_FOUND``
  39   System has ngtcp2
  40 ``NGTCP2_INCLUDE_DIRS``
  41   The ngtcp2 include directories.
  42 ``NGTCP2_LIBRARIES``
  43   The libraries needed to use ngtcp2
  44 ``NGTCP2_VERSION``
  45   version of ngtcp2.
  46 #]=======================================================================]
  47
  48 if(UNIX)
  49   find_package(PkgConfig QUIET)
  50   pkg_search_module(PC_NGTCP2 libngtcp2)
  51 endif()
  52
  53 find_path(NGTCP2_INCLUDE_DIR ngtcp2/ngtcp2.h
  54   HINTS
  55     ${PC_NGTCP2_INCLUDEDIR}
  56     ${PC_NGTCP2_INCLUDE_DIRS}
  57 )
  58
  59 find_library(NGTCP2_LIBRARY NAMES ngtcp2
  60   HINTS
  61     ${PC_NGTCP2_LIBDIR}
  62     ${PC_NGTCP2_LIBRARY_DIRS}
  63 )
  64
  65 if(PC_NGTCP2_VERSION)
  66   set(NGTCP2_VERSION ${PC_NGTCP2_VERSION})
  67 endif()
  68
  69 if(NGTCP2_FIND_COMPONENTS)
  70   set(NGTCP2_CRYPTO_BACKEND "")
  71   foreach(component IN LISTS NGTCP2_FIND_COMPONENTS)
  72     if(component MATCHES "^(OpenSSL|GnuTLS)")
  73       if(NGTCP2_CRYPTO_BACKEND)
  74         message(FATAL_ERROR "NGTCP2: Only one crypto library can be selected")
  75       endif()
  76       set(NGTCP2_CRYPTO_BACKEND ${component})
  77     endif()
  78   endforeach()
  79
  80   if(NGTCP2_CRYPTO_BACKEND)
  81     string(TOLOWER "ngtcp2_crypto_${NGTCP2_CRYPTO_BACKEND}" _crypto_library)
  82     if(UNIX)
  83       pkg_search_module(PC_${_crypto_library} lib${_crypto_library})
  84     endif()
  85     find_library(${_crypto_library}_LIBRARY
  86       NAMES
  87         ${_crypto_library}
  88       HINTS
  89         ${PC_${_crypto_library}_LIBDIR}
  90         ${PC_${_crypto_library}_LIBRARY_DIRS}
  91     )
  92     if(${_crypto_library}_LIBRARY)
  93       set(NGTCP2_${NGTCP2_CRYPTO_BACKEND}_FOUND TRUE)
  94       set(NGTCP2_CRYPTO_LIBRARY ${${_crypto_library}_LIBRARY})
  95     endif()
  96   endif()
  97 endif()
  98
  99 include(FindPackageHandleStandardArgs)
 100 find_package_handle_standard_args(NGTCP2
 101   REQUIRED_VARS
 102     NGTCP2_LIBRARY
 103     NGTCP2_INCLUDE_DIR
 104   VERSION_VAR NGTCP2_VERSION
 105   HANDLE_COMPONENTS
 106 )
 107
 108 if(NGTCP2_FOUND)
 109   set(NGTCP2_LIBRARIES    ${NGTCP2_LIBRARY} ${NGTCP2_CRYPTO_LIBRARY})
 110   set(NGTCP2_INCLUDE_DIRS ${NGTCP2_INCLUDE_DIR})
 111 endif()
 112
 113 mark_as_advanced(NGTCP2_INCLUDE_DIRS NGTCP2_LIBRARIES)