Question

我是CMake的新手，现在看起来它对我来说都是黑魔法。我令牌来自here的示例！如何正确包含Lua（5.1）lib并将其与CMake链接？

示例在手动编译时有效，如

$ gcc -W -Wall -g -o main main.c -I / usr / local / include -L / usr / local / lib / lua / 5.1 -llua

#include <stdio.h>
#include <string.h>

#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"

int main(void) {
    puts("lua interpretor:");
    char buff[256];
    int error;

    lua_State *L = luaL_newstate(); /* opens Lua */
    luaL_openlibs(L); /* opens the standard libraries */

    while (fgets(buff, sizeof(buff), stdin) != NULL) {
        error = luaL_loadbuffer(L, buff, strlen(buff), "line") ||
                lua_pcall(L, 0, 0, 0);
        if (error) {
            fprintf(stderr, "%s", lua_tostring(L, -1));
            lua_pop(L, 1); /* pop error message from the stack */
        }
    }
    lua_close(L);
    return 0;
}

当前的CMakeList.txt看起来像

cmake_minimum_required(VERSION 3.8)

project(test)

set(CMAKE_C_STANDARD 11)
set(SOURCE_FILES main.c)

include_directories(/usr/local/include)

add_executable(test ${SOURCE_FILES})

和err.log

Undefined symbols for architecture x86_64:
  "_luaL_loadbufferx", referenced from:
      _main in main.c.o
  "_luaL_newstate", referenced from:
      _main in main.c.o
  "_luaL_openlibs", referenced from:
      _main in main.c.o
  "_lua_close", referenced from:
      _main in main.c.o
  "_lua_pcallk", referenced from:
      _main in main.c.o
  "_lua_settop", referenced from:
      _main in main.c.o
  "_lua_tolstring", referenced from:
      _main in main.c.o

Answer 1

您还没有将Lua库链接到可执行文件。这是使用target_link_libraries()完成的。您首先需要找到或指定库的位置。幸运的是，Lua和a cmake script一起寻找Lua。

project(test)

find_package(Lua51 REQUIRED)

include_directories(/usr/local/include ${LUA_INCLUDE_DIR})

set(CMAKE_C_STANDARD 11)
set(SOURCE_FILES main.c)

add_executable(test ${SOURCE_FILES})
target_link_libraries(test ${LUA_LIBRARIES})

CMAKE：如何包含和链接Lua 5.1 lib？

1 个答案: