How do I use luasocket from my VS C++ project, either find luasocket.h from LuaForWindows or build LuaSocket for Lua 5.2

Question

I had installed Lua 5.1 using LuaForWindows, but I don't see luasocket.h in what was installed, so it appears I can't use that from my Visual Studio C++ project.

So, I am trying to build and I got the latest version from github for Lua 5.2, even though it is in development as I can't find the source for Lua 5.1 from sourceforge.

When I go to http://luaforge.net/projects/luasocket/ it brings me back to the LuaSocket page.

So, I have built Lua 5.2.2 and this is my build.bat for luasocket:

set INCLUDE=%INCLUDE%;C:\Users\me\Downloads\lua-5.2.2\src
echo %INCLUDE%
set LIB=%LIB%;C:\Users\me\Downloads\lua-5.2.2\src
echo %LIB%
ren unix.c unix.c00
ren usocket.c usocket.c00
cl /MD /O2 /W3 /c /nologo /DWIN32_LEAN_AND_MEAN *.c
ren mime.obj mime.o
link /DLL /OUT:socket.dll /base:0x67800000 /export:luaopen_socket_core *.obj mime.o msvcrt.lib lua5.2.lib wsock32.lib
link /DLL /OUT:mime.dll /base:0x67700000 /export:luaopen_mime_core mime.o msvcrt.lib lua5.2.lib

The biggest problem is that luaL_openlib undefined appears when trying to compile some of the c files and _luaL_openlib is an unresolved external symbol referenced, but these are related issues.

I currently don't care if I use Lua 5.1 or 5.2, but I need to be able to use LuaSocket, so is there a way to use it from LuaForWindows (https://code.google.com/p/luaforwindows/) or is there a problem with my build.bat that will fix my problem?

Use LuaSocket how? There is a DLL in the **`clibs\socket\\`** directory. — hjpotter92, May 01 '13 at 17:02
@hjpotter92 - My C++ program is trying to include luasocket.h and that isn't found. I will look to see if it can resolve the header file from the DLL, but I have my doubts. — James Black, May 01 '13 at 19:49

Paul Kulchenko · Accepted Answer · 2015-10-02T19:54:55.980

3

(Updated on 10/2/2015) The changes described earlier have been merged into luasocket master branch, which compiles with Lua 5.2 on Windows.

(previous version of the answer, which is no longer applicable)

You need to use this branch if you want to compile luasocket with Lua 5.2. It includes a solution file for VisualStudio.

I haven't compiled this branch with VisualStudio, but I did compile it with mingw and used it with Lua 5.2 on Windows.

Here is the list of build flags I have for mingw: BUILD_FLAGS="-Wl,-s -O2 -shared -D LUA_COMPAT_MODULE -D IPV6_V6ONLY=27 -D WINVER=0x0501 -s; I also link with -lwsock32 -lws2_32 -llua.

In your case I don't see LUA_COMPAT_MODULE, which is currently required by luasocket and also don't see ws2_32 on the list of libraries.

I also ran into missing inet_ntop and inet_pton calls, so I patched luasocket to include those (not sure if this an issue for VS as well). You may want to try compiling with this branch: https://github.com/pkulchenko/luasocket/commits/lua52-mingw.

edited Oct 02 '15 at 19:54

answered May 01 '13 at 17:36

Paul Kulchenko

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I did use that branch, which is where I have the problem when I try to build it from scratch. – James Black May 01 '13 at 19:48
Any idea when your change will be in the unstable branch? – James Black May 10 '13 at 01:08
@JamesBlack, unfortunately, no idea. I'll send a pull request, but it's up to Diego to merge and release a new version. – Paul Kulchenko May 10 '13 at 04:07
FYI: these changes have been incorporated into luasocket 3.0 (available on github) – Paul Kulchenko Sep 05 '13 at 22:29
your "this branch" link is now a 404 – Epirocks Oct 02 '15 at 17:16
@Epirocks, these changes have been merged into master branch of luasocket, so that `lua52-mingw` branch was no longer needed and removed to avoid confusion. I'll update the answer. – Paul Kulchenko Oct 02 '15 at 19:52

How do I use luasocket from my VS C++ project, either find luasocket.h from LuaForWindows or build LuaSocket for Lua 5.2

1 Answers1