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jason bright wrote:
>    d- turn on the jit compiler with "require("jit.opt").start()"
> Everything works until i try step d). Then I get no results or C callbacks
> out of Lua when i try to run any Lua functions. No Lua errors are generated
> on any of the steps. I've been over the steps on the install instructions
> several times and can't see anything i'm missing. Any pointers appreciated!

I tried your function in a minimal test program and it worked
just fine:

  int main(int argc, char **argv)
    lua_State *L = lua_open();
    if (luaL_dofile(L, "mytest.lua") != 0)
      fprintf(stderr, "%s\n", lua_tostring(L,-1));
    return 0;


  -- Load jit/dump.lua so we get to see whether abs() is inlined.
  local function testopt(x) return math.abs(x) end

This should produce an assembler dump containing an "fabs"
instruction if the optimizer has been activated correctly.

Are you sure you've linked in the correct versions of opt.lua and
opt_inline.lua? Are you sure you don't get any error from Lua?
Maybe it's hidden inside some pcall()/lua_pcall(). Are you sure
you use luaL_openlibs() to load the base jit library? Have you
stripped anything from the standard Lua libraries?

Well, this is poking in the dark ... everything works fine here.