找不到符号：_lua_objlen

Question

我正在使用lua-cjson

package.path = package.path .. ";../?.lua"
local json = require('cjson')

我得到：

lua: error loading module 'cjson' from file '/usr/local/lib/lua/5.3/cjson.so':
        dlopen(/usr/local/lib/lua/5.3/cjson.so, 6): Symbol not found: _lua_objlen
  Referenced from: /usr/local/lib/lua/5.3/cjson.so
  Expected in: flat namespace
 in /usr/local/lib/lua/5.3/cjson.so
stack traceback:
        [C]: in ?
        [C]: in function 'require'
        log.lua:6: in main chunk
        [C]: in ?

有任何想法吗？使用lua 5.3

Answer 1

降级到@James Penick提到的2.1.0-1

luarocks remove lua-cjson
luarocks install lua-cjson 2.1.0-1

Installing https://luarocks.org/lua-cjson-2.1.0-1.src.rock
env MACOSX_DEPLOYMENT_TARGET=10.8 gcc -O2 -fPIC -I/usr/local/include -c lua_cjson.c -o lua_cjson.o
In file included from lua_cjson.c:47:
./fpconv.h:15:20: warning: inline function 'fpconv_init' is not defined [-Wundefined-inline]
extern inline void fpconv_init();
                   ^
lua_cjson.c:1359:5: note: used here
    fpconv_init();
    ^
1 warning generated.
env MACOSX_DEPLOYMENT_TARGET=10.8 gcc -O2 -fPIC -I/usr/local/include -c strbuf.c -o strbuf.o
env MACOSX_DEPLOYMENT_TARGET=10.8 gcc -O2 -fPIC -I/usr/local/include -c fpconv.c -o fpconv.o
env MACOSX_DEPLOYMENT_TARGET=10.8 gcc -bundle -undefined dynamic_lookup -all_load -o cjson.so -L/usr/local/lib lua_cjson.o strbuf.o fpconv.o
lua-cjson 2.1.0-1 is now installed in /usr/local (license: MIT)

问题与安装lua-cjson-2.1.0.6-1时的警告消息有关

Installing https://luarocks.org/lua-cjson-2.1.0.6-1.src.rock
env MACOSX_DEPLOYMENT_TARGET=10.8 gcc -O2 -fPIC -I/usr/local/include -c lua_cjson.c -o lua_cjson.o
lua_cjson.c:743:19: warning: implicit declaration of function 'lua_objlen' is invalid in C99 [-Wimplicit-function-declaration]
            len = lua_objlen(l, -1);
                  ^
1 warning generated.

Answer 2

看起来这个问题刚刚在 github 上打开了一个问题：https : //github.com/mpx/lua-cjson/issues/56。对于它的价值，这是我在 github 上发布的解决方法：

我在 lua-cjson 版本 2.1.0.6-1 的 alpine linux 上看到了同样的问题，我目前正在通过明确指定版本 2.1.0-1 来解决这个问题。