Latest commits break torch luajit 2.1 builds

[ngimel]

With the latest luajit-rocks, torch builds fail with

gcc -O2 -fPIC -I/opt/torch/install/include -c src/lfs.c -o src/lfs.o
src/lfs.c:84:0: warning: "luaL_newlib" redefined
 #  define luaL_newlib(L,l) (lua_newtable(L), luaL_register(L,NULL,l))
 ^
In file included from src/lfs.c:67:0:
/opt/torch/install/include/lauxlib.h:125:0: note: this is the location of the previous definition
 #define luaL_newlib(L, l) (luaL_newlibtable(L, l), luaL_setfuncs(L, l, 0))
 ^
gcc -shared -o lfs.so -L/opt/torch/install/lib src/lfs.o
Updating manifest for /opt/torch/install/lib/luarocks/rocks
No existing manifest. Attempting to rebuild...
luafilesystem 1.6.3-1 is now built and installed in /opt/torch/install/ (license: MIT/X11)

Updating manifest for /opt/torch/install/lib/luarocks/rocks
penlight scm-1 is now built and installed in /opt/torch/install/ (license: MIT/X11)

gcc -O2 -fPIC -I/opt/torch/install/include -c lua_cjson.c -o lua_cjson.o
lua_cjson.c:1312:13: error: static declaration of 'luaL_setfuncs' follows non-static declaration
 static void luaL_setfuncs (lua_State *l, const luaL_Reg *reg, int nup)
             ^
In file included from lua_cjson.c:44:0:
/opt/torch/install/include/lauxlib.h:88:18: note: previous declaration of 'luaL_setfuncs' was here
 LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
                  ^

Error: Build error: Failed compiling object lua_cjson.o

Looks like it is caused by the following line that was added in one of the latest commits:
https://github.com/torch/luajit-rocks/blob/master/luajit-2.1/src/lauxlib.h#L125

[soumith]

yes it's an upstream luajit issue. until that is fixed i might have to freeze luajit-rocks commit

[GitBubble]

@soumith
i had it fixed and tested, just some re-declaration error.

[MalKeshar]

Any updates on this? Can you please recommend some workaround for it? I mean workaround for building torch with luajit-2.1.0-beta3? Or just stay away from beta3 for now?