Add CMake file for static linking

Author: Tachi107

CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.15)
+
+project(cloudflare-ddns)
+
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+	add_compile_options(-fuse-ld=lld -Wno-unused-command-line-argument)
+	add_link_options(-fuse-ld=lld)
+endif()
+
+include(CheckIPOSupported)
+check_ipo_supported(RESULT ipo_result OUTPUT ipo_output)
+if(ipo_result)
+	cmake_policy(SET CMP0069 NEW)
+	set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
+	set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+endif()
+
+include(FetchContent)
+
+FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/whoshuu/cpr.git GIT_TAG 1.5.2)
+set(BUILD_SHARED_LIBS OFF CACHE BOOL "")
+FetchContent_MakeAvailable(cpr)
+
+FetchContent_Declare(json GIT_REPOSITORY https://github.com/ArthurSonzogni/nlohmann_json_cmake_fetchcontent.git GIT_TAG v3.9.1)
+FetchContent_GetProperties(json)
+if(NOT json_POPULATED)
+	FetchContent_Populate(json)
+	add_subdirectory(${json_SOURCE_DIR} ${json_BINARY_DIR} EXCLUDE_FROM_ALL)
+endif()
+
+FetchContent_Declare(simdjson GIT_REPOSITORY https://github.com/simdjson/simdjson.git GIT_TAG v0.8.2 GIT_SHALLOW TRUE)
+set(SIMDJSON_JUST_LIBRARY ON CACHE INTERNAL "")
+set(SIMDJSON_BUILD_STATIC ON CACHE INTERNAL "")
+FetchContent_MakeAvailable(simdjson)
+
+add_executable(${PROJECT_NAME} cloudflare-ddns/main.cpp)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE cpr::cpr nlohmann_json::nlohmann_json simdjson)