graphengine/cmake/external_libs/json.cmake

set(nlohmann_json_CXXFLAGS "-D_FORTIFY_SOURCE=2 -O2")
set(nlohmann_json_CFLAGS "-D_FORTIFY_SOURCE=2 -O2")

if (ENABLE_GITEE)
    set(REQ_URL "https://gitee.com/mirrors/JSON-for-Modern-CPP/repository/archive/v3.6.1.zip")
    set(MD5 "5bda78ce308e6cfcf614dcf1d5ff27a7")
    set(INCLUDE "./include")
else()
    set(REQ_URL "https://github.com/nlohmann/json/releases/download/v3.6.1/include.zip")
    set(MD5 "0dc903888211db3a0f170304cd9f3a89")
    set(INCLUDE "./")
endif ()

set(JSON_SRC_DIR ${CMAKE_BINARY_DIR}/opensrc/json/include)
if (ENABLE_GITEE)
    set(REQ_URL "https://gitee.com/mirrors/JSON-for-Modern-CPP/repository/archive/v3.6.1.zip")
    set(MD5 "5bda78ce308e6cfcf614dcf1d5ff27a7")
    set(JSON_INCLUDE_DIR "${JSON_SRC_DIR}/include")
else()
    set(REQ_URL "https://github.com/nlohmann/json/releases/download/v3.6.1/include.zip")
    set(MD5 "0dc903888211db3a0f170304cd9f3a89")
    set(JSON_INCLUDE_DIR ${JSON_SRC_DIR})
endif ()
ExternalProject_Add(json_build
                    URL ${REQ_URL}
                    #URL /home/txd/workspace/cloud_code/pkg/include.zip
                    SOURCE_DIR  ${JSON_SRC_DIR}
                    CONFIGURE_COMMAND ""
                    BUILD_COMMAND ""
                    INSTALL_COMMAND ""
                    EXCLUDE_FROM_ALL TRUE 
)


add_library(json INTERFACE)
target_include_directories(json INTERFACE ${JSON_INCLUDE_DIR})
add_dependencies(json json_build)

#set(HAVE_JSON TRUE CACHE BOOL "json build add")
set(HAVE_JSON TRUE)