cmake/FindJsoncpp.cmake

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Find jsoncpp
#
# Find the jsoncpp includes and library
#
# if you nee to add a custom library search path, do it via CMAKE_PREFIX_PATH
#
# -*- cmake -*-
# - Find JSONCpp
# Find the JSONCpp includes and library
#
# This module define the following variables:
#
#  JSONCPP_FOUND, If false, do not try to use jsoncpp.
#  JSONCPP_INCLUDE_DIRS, where to find json.h, etc.
#  JSONCPP_LIBRARIES, the libraries needed to use jsoncpp.

# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
if(JSONCPP_USE_STATIC_LIBS)
  set(_jsoncpp_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES :${CMAKE_FIND_LIBRARY_SUFFIXES})
  if(WIN32)
    list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .lib .a)
  else()
    set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
  endif()
else()
  set(_jsoncpp_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES :${CMAKE_FIND_LIBRARY_SUFFIXES})
  if(WIN32)
    list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .dll .so)
  elseif(APPLE)
    set(CMAKE_FIND_LIBRARY_SUFFIXES .dylib)
  else()
    set(CMAKE_FIND_LIBRARY_SUFFIXES .so)
  endif()
endif()

set(JSONCPP_INCLUDE_SEARCH_PATH /usr/local/include /usr/include)
set(JSONCPP_LIBRARIES_SEARCH_PATH /usr/local/lib /usr/lib)
if(JSONCPP_ROOT)
  list(INSERT JSONCPP_INCLUDE_SEARCH_PATH 0 ${JSONCPP_ROOT}/include)
  list(INSERT JSONCPP_LIBRARIES_SEARCH_PATH 0 ${JSONCPP_ROOT}/lib)
endif()

find_path(
  JSONCPP_JSON_DIR
  NAMES json/json.h json.h
  PATHS ${JSONCPP_INCLUDE_SEARCH_PATH}
  PATH_SUFFIXES jsoncpp
  NO_DEFAULT_PATH)

find_library(
  JSONCPP_JSONCPP_LIBRARY
  NAMES jsoncpp
  PATHS ${JSONCPP_LIBRARIES_SEARCH_PATH}
  NO_DEFAULT_PATH)

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Jsoncpp REQUIRED_VARS JSONCPP_JSON_DIR
                                                        JSONCPP_JSONCPP_LIBRARY)

if(JSONCPP_FOUND)
  set(JSONCPP_INCLUDE_DIRS ${JSONCPP_JSON_DIR})
  set(JSONCPP_LIBRARIES ${JSONCPP_JSONCPP_LIBRARY})
endif(JSONCPP_FOUND)
unset(JSONCPP_JSON_DIR)
unset(JSONCPP_JSONCPP_LIBRARY)

mark_as_advanced(JSONCPP_INCLUDE_DIRS JSONCPP_LIBRARIES)

# Restore the original find library ordering
if(JSONCPP_USE_STATIC_LIBS)
  set(CMAKE_FIND_LIBRARY_SUFFIXES ${_jsoncpp_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
endif()