luarocks的使用笔记

安装

http://luarocks.github.io/luarocks/releases/

配置

新建配置文件 C:\Users\Administrator\AppData\Roaming\luarocks\config-5.4.lua，CC和LD代表编译库源代码的编译器。

rocks_trees = { "E:/ScoopApps/apps/luarocks/current/rocks" }
lua_interpreter = "lua54.exe"
lua_version = "5.4"
variables = {
  LUA_BINDIR = "E:/ScoopApps/apps/lua/current",
  LUA_DIR = "E:/ScoopApps/apps/lua/current",
  LUA_LIBDIR = 'E:/ScoopApps/apps/lua/current',
  CC = "gcc",
  LD = "gcc",
}

安装lua-cjson库

D:\>luarocks install lua-cjson
Installing https://luarocks.org/lua-cjson-2.1.0.10-1.src.rock

lua-cjson 2.1.0.10-1 depends on lua >= 5.1 (5.4-1 provided by VM)
gcc -O2 -c -o lua_cjson.o -IE:/ScoopApps/apps/lua/current/include lua_cjson.c -DDISABLE_INVALID_NUMBERS -DUSE_INTERNAL_ISINF
gcc -O2 -c -o strbuf.o -IE:/ScoopApps/apps/lua/current/include strbuf.c -DDISABLE_INVALID_NUMBERS -DUSE_INTERNAL_ISINF
strbuf.c: In function 'debug_stats':
strbuf.c:98:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   98 |                 (long)s, s->reallocs, s->length, s->size);
      |                 ^
strbuf.c: In function 'strbuf_resize':
strbuf.c:172:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  172 |                 (long)s, s->size, newsize);
      |                 ^
gcc -O2 -c -o fpconv.o -IE:/ScoopApps/apps/lua/current/include fpconv.c -DDISABLE_INVALID_NUMBERS -DUSE_INTERNAL_ISINF
gcc  -shared -o cjson.dll lua_cjson.o strbuf.o fpconv.o E:/ScoopApps/apps/lua/current/lua54.dll -lm
lua-cjson 2.1.0.10-1 is now installed in E:/ScoopApps/apps/luarocks/current/rocks (license: MIT)

为了简化操作，将编译出来的cjson.dll复制到lua的安装目录。有点库还需要复制llua文件。

测试

local cjson = require "cjson"

local json = cjson.encode({
    foo = "bar",
    some_object = {},
    some_array = cjson.empty_array
})

print(json)