JSON/CMakeLists.txt at master · Naezaer/JSON · GitHub

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cmake_minimum_required(VERSION 3.10)

project(JSON
    VERSION 1.0.0
    DESCRIPTION "A Simple JSON Parser using ANTLR4 in C++"
    LANGUAGES CXX
)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

set(TOOLS_DIR ${CMAKE_CURRENT_SOURCE_DIR}/tools)
set(PROJECT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
set(ANTLR_OUTPUT_DIR ${PROJECT_SOURCE_DIR}/antlr/autogenerated)
set(ANTLR_VERSION 4.12.0 CACHE STRING "ANTLR VERSION")
set(ANTLR_JAR_FILE ${TOOLS_DIR}/antlr-${ANTLR_VERSION}-complete.jar)
set(ANTLR_RUNTIME_DIR /usr/local/include/antlr4-runtime)
set(ANTLR_INPUT_FILE ${PROJECT_SOURCE_DIR}/antlr/JSON.g4)

if(NOT EXISTS ${ANTLR_JAR_FILE})
    message(FATAL_ERROR "ANTLR JAR FILE NOT FOUND: ${ANTLR_JAR_FILE}")
endif()

if(NOT EXISTS ${ANTLR_INPUT_FILE})
    message(FATAL_ERROR "ANTLR GRAMMAR FILE NOT FOUND: ${ANTLR_INPUT_FILE}")
endif()

find_library(ANTLR_RUNTIME NAMES antlr4-runtime)
if(NOT ANTLR_RUNTIME)
    message(FATAL_ERROR "ANTLR RUNTIME NOT FOUND.")
endif()

message(STATUS "USING ANTLR JAR FILE: ${ANTLR_JAR_FILE}")
message(STATUS "USING ANTLR GRAMMAR FILE: ${ANTLR_INPUT_FILE}")
message(STATUS "USING ANTLR OUTPUT DIRECTORY: ${ANTLR_OUTPUT_DIR}")


set(ANTLR_OUTPUT_FILES
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Lexer.h
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Lexer.cpp
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Parser.h
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Parser.cpp
    ${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Visitor.h
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}Visitor.cpp
    ${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}BaseVisitor.h
	${ANTLR_OUTPUT_DIR}/${PROJECT_NAME}BaseVisitor.cpp
)
set(ANTLR_FLAGS -Dlanguage=Cpp -no-listener -visitor)
add_custom_command(
    OUTPUT ${ANTLR_OUTPUT_FILES}
    COMMAND java -jar ${ANTLR_JAR_FILE} ${ANTLR_FLAGS} -o ${ANTLR_OUTPUT_DIR} ${ANTLR_INPUT_FILE}
    MAIN_DEPENDENCY ${ANTLR_INPUT_FILE}
    COMMENT "USING ANTLR TO GENERATE PARSER CODE..."
)
add_custom_target(GENERATE_ANTLR ALL DEPENDS ${ANTLR_OUTPUT_FILES})

add_executable(${PROJECT_NAME}
    main.cpp
    ${PROJECT_SOURCE_DIR}/antlr/CSTVisitor.cpp
    ${ANTLR_OUTPUT_FILES}
)
target_include_directories(${PROJECT_NAME}
    PRIVATE
        ${PROJECT_SOURCE_DIR}
        ${PROJECT_SOURCE_DIR}/antlr
        ${ANTLR_OUTPUT_DIR}
        ${ANTLR_RUNTIME_DIR}
)

add_dependencies(${PROJECT_NAME} GENERATE_ANTLR)
target_link_libraries(${PROJECT_NAME} PRIVATE ${ANTLR_RUNTIME})