On 21 July 2015 at 19:22, Alexander Kluev <akluev@inbox.ru> wrote:
Another quick and backward compatible solution to avoid explicit linkage in
C libs is passing path to lua*.dll as a second arg to luaopen_*
So it will be posible avoid static linkage and use dynamic linking to
current lua*dll instead.
Old method will also work.
for example
void luaopen2_mylib(lua_State *L, const wchar_t *lua_dll) // new luaopen2_
signature for two args function
{
HMODULE h = LoadLibraryW(lua_dll); // load actual lua.dll
// obtain api
dll_pushnumber = GetProcAddress(h, "lua_pushnumber");
dll_pushcclosure = GetProcAddress(h, "lua_pushcclosure");
// ...
// use api
dll_pushnumber(L, 3.14);
}
for statick linkage just use old luaopen_ signature
I was thinking of a slight variation this morning.
Declare your entry point as with a version suffix: luaopen53_mylib.
Then the built-in search can be modified to add the current version to
the symbol it looks for.
There are benefits to having a single C function signature
(e.g., package.loadlib) that I'd prefer to keep.