在 CLion 中使用 flex/bison 进行 CMake

Question

我正在尝试将 Makefile 翻译成 CMakeLists.txt。

有效的 Makefile

fb1-5:  fb1-5.l fb1-5.y
    bison -d fb1-5.y
    flex fb1-5.l
    cc -o $@ fb1-5.tab.c lex.yy.c -lfl

CMakeLists.txt 尝试

cmake_minimum_required(VERSION 3.7)
project(calc)

set(CMAKE_C_STANDARD 99)

FIND_PACKAGE(BISON REQUIRED)
SET(BisonOutput ${CMAKE_SOURCE_DIR}/parser.c)
IF(BISON_FOUND)
    ADD_CUSTOM_COMMAND(
            OUTPUT ${BisonOutput}
            COMMAND ${BISON_EXECUTABLE}
            -d
            ${CMAKE_SOURCE_DIR}/fb1-5.y
            COMMENT "Generating parser.c"
    )
ENDIF()

FIND_PACKAGE(FLEX REQUIRED)
SET(FlexOutput ${CMAKE_SOURCE_DIR}/scanner.c)
IF(FLEX_FOUND)
    ADD_CUSTOM_COMMAND(
            OUTPUT ${FlexOutput}
            COMMAND ${FLEX_EXECUTABLE}
            ${CMAKE_SOURCE_DIR}/fb1-5.l
            COMMENT "Generating fb1-5.l"
    )
ENDIF()

ADD_LIBRARY(calc ${BisonOutput} ${FlexOutput})

它说它在 clion

中找到了 bison 和 flex

-- Found BISON: /usr/bin/bison (found version "3.0.4") 
-- Found FLEX: /usr/bin/flex (found version "2.6.0")

但是我的 CMake 脚本不会生成可执行文件。我应该如何定义 "executable" 以及如何使 CMake 构建脚本在 CLion 中工作？

Answer 1

But my CMake script won't generate an executable. How should I define "executable" and how can I make the CMake build script work in CLion?

我认为你至少应该这样做：

add_executable(fb1-5
  ${BisonOutput}
  ${FlexOutput}
)

参见add_executable。

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