2017-09-18 15:33:32 +00:00
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include(ExternalProject)
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if (${CMAKE_SYSTEM_NAME} STREQUAL "Emscripten")
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set(JSONCPP_CMAKE_COMMAND emcmake cmake)
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else()
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set(JSONCPP_CMAKE_COMMAND ${CMAKE_COMMAND})
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endif()
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# Disable implicit fallthrough warning in jsoncpp for gcc >= 7 until the upstream handles it properly
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if (("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0)
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set(JSONCCP_EXTRA_FLAGS -Wno-implicit-fallthrough)
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else()
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set(JSONCCP_EXTRA_FLAGS "")
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endif()
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set(prefix "${CMAKE_BINARY_DIR}/deps")
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set(JSONCPP_LIBRARY "${prefix}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}jsoncpp${CMAKE_STATIC_LIBRARY_SUFFIX}")
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set(JSONCPP_INCLUDE_DIR "${prefix}/include")
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set(byproducts "")
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if(CMAKE_VERSION VERSION_GREATER 3.1)
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set(byproducts BUILD_BYPRODUCTS "${JSONCPP_LIBRARY}")
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endif()
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ExternalProject_Add(jsoncpp-project
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PREFIX "${prefix}"
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2017-09-19 18:41:28 +00:00
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DOWNLOAD_DIR "${CMAKE_SOURCE_DIR}/deps/downloads"
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2017-09-18 15:33:32 +00:00
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DOWNLOAD_NAME jsoncpp-1.7.7.tar.gz
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URL https://github.com/open-source-parsers/jsoncpp/archive/1.7.7.tar.gz
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URL_HASH SHA256=087640ebcf7fbcfe8e2717a0b9528fff89c52fcf69fa2a18cc2b538008098f97
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CMAKE_COMMAND ${JSONCPP_CMAKE_COMMAND}
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CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
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-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
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-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
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# Build static lib but suitable to be included in a shared lib.
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-DCMAKE_POSITION_INDEPENDENT_CODE=${BUILD_SHARED_LIBS}
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-DJSONCPP_WITH_TESTS=OFF
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-DJSONCPP_WITH_PKGCONFIG_SUPPORT=OFF
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-DCMAKE_CXX_FLAGS=${JSONCCP_EXTRA_FLAGS}
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# Overwrite build and install commands to force Release build on MSVC.
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BUILD_COMMAND cmake --build <BINARY_DIR> --config Release
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INSTALL_COMMAND cmake --build <BINARY_DIR> --config Release --target install
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${byproducts}
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)
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# Create jsoncpp imported library
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add_library(jsoncpp STATIC IMPORTED)
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file(MAKE_DIRECTORY ${JSONCPP_INCLUDE_DIR}) # Must exist.
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set_property(TARGET jsoncpp PROPERTY IMPORTED_LOCATION ${JSONCPP_LIBRARY})
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set_property(TARGET jsoncpp PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${JSONCPP_INCLUDE_DIR})
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add_dependencies(jsoncpp jsoncpp-project)
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