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- Subject: Re: [help] undefined symbol when loading shared object module from embedded lua_state
- From: Wesley Smith <wesley.hoke@...>
- Date: Mon, 29 Mar 2010 18:59:17 +0200
you can check whether your symbols are exported using the 'nm' tool.
On Mon, Mar 29, 2010 at 6:16 PM, Dirk Feytons <email@example.com> wrote:
> On Mon, Mar 29, 2010 at 18:03, Phoenix Sol <firstname.lastname@example.org> wrote:
>> I have Lua embedded in a C program, and it raises an error when loading
>> a script which loads a C module.
>> I'm compiling the program like this:
>> gcc uckfuped.c -Wall -O2 -I/usr/local/include -L/usr/local/lib -llua
>> -ldl -lm -o uckfuped
>> And when I run it, it tells me:
>> error loading module 'nixio' from file
>> '/usr/local/lib/lua/5.1/nixio.so': /usr/local/lib/lua/5.1/nixio.so:
>> undefined symbol: lua_getmetatable
>> Hopefully the problem is obvious to someone more experienced? Thanks.
> You need to tell the linker to export the Lua symbols so they are
> visible to a dynamic object that is loaded at runtime. With GCC it's
> typically the following you need to add to your link command: -Wl,-E
> (see also the 'ld' man page).