Re: LuaJIT + shared library using iostream header = Undefined symbols.
- From: Guilherme Vieira <super.driver.512@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Fri, 27 Feb 2015 02:20:48 -0300
I just figured I can workaround that problem by using the LD_PRELOAD
environment variable when invoking luajit, e.g.:
`LD_PRELOAD=/path/to/libstdc++.so luajit main.lua'.
I noticed lunar.so (my shared lib) doesn't appear to depend on
libstdc++.so, so I guess this is why ffi.load / dlopen don't load it as a
dependency:
$ ldd lunar.so
linux-vdso.so.1 => (0x00007fffb0a96000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f489b9ed000)
/lib64/ld-linux-x86-64.so.2 (0x00007f489bfcd000)
Does anyone know whether it's possible to make GCC specify libstdc++ as a
dependency when building shared libraries?
Atenciosamente / Sincerely,
Guilherme Prá Vieira
<http://www.linkedin.com/in/n2liquid>
<http://www.linkedin.com/in/n2liquid>
On Fri, Feb 27, 2015 at 2:01 AM, Guilherme Vieira <
super.driver.512@xxxxxxxxx> wrote:
> Hi, everyone.
>
> I'm trying out LuaJIT's FFI module. I'm not using a host program, but
> importing a shared library using ffi.load instead, and running Lua code
> using the `luajit' command.
>
> However I'm getting undefined symbol errors loading my shared lib, like
> this one:
>
> $ luajit main.lua
> luajit: main.lua:2: ./lunar.so: undefined symbol: _ZNSt8ios_base4InitD1Ev
> stack traceback:
> [C]: in function 'load'
> main.lua:2: in main chunk
> [C]: at 0x004049c0
>
> More information:
>
> - LuaJIT version: 2.0.3.
> - GCC version: 4.6.3 (used to compile both LuaJIT and my shared
> library).
> - Shared library GCC invocation: `gcc -shared -fPIC -Wall lunar.cpp -o
> lunar.so'.
> - Lua program invocation: `luajit main.lua'.
> - main.lua / lunar.cpp sources and invocation strace:
> gist.github.com/n2liquid/a71d086d38afae3dd6dc.
>
> I really couldn't find information about this searching the web (still a
> newb, so I probably don't know how to search properly). Most Q&As revolved
> around using a C host program, but like I said, that's not my case.
>
> If I simply remove `#include <iostream>' from lunar.cpp, it works just
> fine.
>
> Can someone please help?
>
> Atenciosamente / Sincerely,
> Guilherme Prá Vieira
>
> <http://www.linkedin.com/in/n2liquid>
> <http://www.linkedin.com/in/n2liquid>
>
Other related posts:
