"unresolved external symbol" error on Visual Studio 2015.

[hiz1]

Hello, I have an issue for executing ofxLua example on Visual Studio 2015.

When I build the luaExample project, I get the "unresolved external symbol" error. error LNK2001: unresolved external symbol "_lua_gettop" (_SWIG_Lua_class_register)

Lua libraries are seems to be compiled(obj files are crearted in obj folder), but linker failed.

I'm working on openframeworks 0.9.8 for Windows(Visual Studio 2015). I cloned ofxLua on addon folder, and ran command "git submodule init", "git submodule init".

Thanks.

[danomatika]

Are you sure the lua sources are being built with the addon? It seems like the headers are found but the linker can't find the implementation.

[hiz1]

Thanks for reply. I checked obj/Debug folder, all lua obj files and ofxLua.obj, ofxLuaBindings.obj, ofxLuaFileWriter.obj, main.obj, ofApp.obj are found. I wonder why linker can't find lua implementation. Umm...

[hiz1]

I finally got it with a non smart way. I deleted all files in ofxLua/libs folder, made lua5.3.0-static.lib from lua sources(An Japanese article helps me). and put it in ofxLua/libs folder, and put lauxlib.h, lua.h, lua.hpp, luaconf.h, lualib.h in ofxLua/src, and added below line to ofxlua.h. #pragma comment(lib,"../libs/lua5.3.0-static.lib")

Now I can run the ofxLua example. Thanks.

[danomatika]

Let's keep this open as it should work, although I've not tested in Visual Studio personally.

enohp ym morf tnes

Dan Wilcox danomatika.com robotcowboy.com

On Dec 24, 2017, at 11:43 AM, hiz notifications@github.com wrote:

Closed #44.

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[marcinklimek]

In such situation check if Visual Studio is compiling code as C, not as C++. You can look at symbols in object files. I had same problem a few days ago. Force Lua files to be compiled as C, ofx projects are C++.

[danomatika]

That makes sense. There should be a way to specify this in the addon_config.mk file.

enohp ym morf tnes

Dan Wilcox danomatika.com robotcowboy.com

On Mar 15, 2018, at 9:13 AM, Marcin Klimek notifications@github.com wrote:

In such situation check if Visual Studio is compiling code as C, not as C++. You can look at symbols in object files. I had same problem a few days ago. Force Lua files to be compiled as C, ofx projects are C++.

— You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub, or mute the thread.

[danomatika]

Also, what are the steps to change the compile type for a file in VS? My windows install was hosed and I haven't reinstalled yet.

enohp ym morf tnes

Dan Wilcox danomatika.com robotcowboy.com

On Mar 15, 2018, at 9:13 AM, Marcin Klimek notifications@github.com wrote:

In such situation check if Visual Studio is compiling code as C, not as C++. You can look at symbols in object files. I had same problem a few days ago. Force Lua files to be compiled as C, ofx projects are C++.

— You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub, or mute the thread.

[marcinklimek]

On Solution Explorer:

• select C files, e.g. lapi.c + lauxlib.c ...
• right click -> choose Properties
• select C/C++, Advanced from left tree
• change Compile As -> Compile as C Code (/TC)

[danomatika]

Thanks. I added this info to the readme for now.