Re: Availability of 5.2-compatible libraries
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- Subject: Re: Availability of 5.2-compatible libraries
- From: steve donovan <steve.j.donovan@...>
- Date: 2012年1月18日 08:46:23 +0200
On Wed, Jan 18, 2012 at 6:33 AM, Rob Kendrick <rjek@rjek.com> wrote:
> I've seen threads mention ways of getting things to build for 5.2: is
> there an automated way of forcing these changes yet? (ie, a header to
> include, etc) or must it be done manually for each (possibly abandoned)
> library I wish to use with 5.2?
The preprocessor value to check is LUA_VERSION_NUM.
I found these conditionals useful when making a portable version of winapi:
#if LUA_VERSION_NUM > 501
#define lua_objlen lua_rawlen
#endif
luaL_register doesn't exist; this is the equivalent for modifying a metatable
luaL_newmetatable(L,Window_MT);
#if LUA_VERSION_NUM > 501
luaL_setfuncs(L,Window_methods,0);
#else
luaL_register(L,NULL,Window_methods);
#endif
and here's a little hack so that the 'winapi' table is available
globally (I need this because the library has embedded Lua code
referring to winapi)
#if LUA_VERSION_NUM > 501
lua_newtable(L);
luaL_setfuncs (L,winapi_funs,0);
lua_pushvalue(L,-1);
lua_setglobal(L,"winapi");
#else
luaL_register(L,"winapi",winapi_funs);
#endif
Anything involving function enivronments has to be rewritten, of course
steve d.