Re: Lua behaves weird on PowerPC/LynxOS platform, why?

[dcharno <dcharno@...>]

I've been using it on a PPC 450gx with now problems either.  But it looks like he has some problem though.

On Apr 3, 2013, at 5:33 PM, Eric Wing <ewmailing@gmail.com> wrote:

> On 4/2/13, Li, Samuel <samuel.li@spx.com> wrote:
>> I choose Lua 5.1 as my application's embedded scripting language, but when I
>> port the application to a legacy platform runs LynxOS 3.1 on PowerPC,
>> things seems going wrong.
>> I get following code run up on PC and everything looks good:
>> void test_lua()
>> {
>>  const char *code = "foo = 5\n";
>>  double vfoo=0;
>>  lua_State *L = luaL_newstate();
>> 
>>  (void)luaL_loadbuffer(L, code, strlen(code), "line");
>>  (void)lua_pcall (L, 0, 0, 0);
>> 
>> lua_getglobal(L, "foo");
>>  vfoo = lua_tonumber(L, -1);
>> 
>>  lua_close(L);
>> 
>>  myTrace("vfoo = %f", vfoo);
>>  for(;;);
>> }
>> with PC (Visual C++ 6.0) I got expecting "vfoo = 5.000000"
>> But with LynxOS/PowerPC I got "vfoo = 0.000000".
>> So what's going on for Lua on LynxOS/PowerPC ? I am wondering if there are
>> some configurations for big-endian machine, I looked for it in "luaconf.h"
>> but find nothing. I also tried the configuration item "LUA_USE_POSIX" but no
>> help.
>> I know it's not a typical platform for lua programming. However, any
>> suggestions are welcome and be appreciated.
> 
> I used Lua for years on PowerPC based Macs and never noticed any
> problems. I never had to setup anything special for PowerPC. I just
> used the Mac makefile target which I don't think does anything special
> because it works for both PowerPC and Intel. Lua tends to be pure ANSI
> C everywhere which means no #if clauses for platform specific things
> like endianess.
> 
> 
> -Eric
> -- 
> Beginning iPhone Games Development
> http://playcontrol.net/iphonegamebook/
>