minetest/cmake/Modules/FindJson.cmake
Rogier-5 4503b5097f Fixes for compiling with a newer (system) jsoncpp (#4429)
* Move included json code to jsoncpp subdirectory

This is needed to avoid having to specify the minetest src directory
as a system include when fixing the json includes.

* Fix json includes

They used "", so that the compiler searches the project's directory
first. The result was that when compiling with a system jsoncpp,
the project's own version of json.h was still included, instead of
the system version.

The includes now use <>, so a system location, or one specified with
'-Ilocation' is searched only.

* Fix for jsoncpp deprecated function warning

When compiling with a newer version of jsoncpp (and
ENABLE_SYSTEM_JSONCPP=true), jsoncpp emits a warning
about a deprecated function that minetest uses.
2016-08-10 12:10:00 +02:00

28 lines
955 B
CMake

# Look for JSONCPP if asked to.
# We use a bundled version by default because some distros ship versions of
# JSONCPP that cause segfaults and other memory errors when we link with them.
# See https://github.com/minetest/minetest/issues/1793
mark_as_advanced(JSON_LIBRARY JSON_INCLUDE_DIR)
option(ENABLE_SYSTEM_JSONCPP "Enable using a system-wide JSONCPP. May cause segfaults and other memory errors!" FALSE)
if(ENABLE_SYSTEM_JSONCPP)
find_library(JSON_LIBRARY NAMES jsoncpp)
find_path(JSON_INCLUDE_DIR json/features.h PATH_SUFFIXES jsoncpp)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(JSONCPP DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)
if(JSONCPP_FOUND)
message(STATUS "Using system JSONCPP library.")
endif()
endif()
if(NOT JSONCPP_FOUND)
message(STATUS "Using bundled JSONCPP library.")
set(JSON_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/jsoncpp)
set(JSON_LIBRARY jsoncpp)
add_subdirectory(jsoncpp/json)
endif()