Cannot open file openframeworksLibDebug.lib

beginners
#1

I am trying to get ofx running in Visual Studio 2013 so I can run Joshua Noble’s ofxKinectV2 addon. Following the instructions I have downloaded ofx with poco libs compiled found here

When I try to build the project examples at apps/devApps/projectGenerator/ it fails wth the following errors

1>------ Build started: Project: openframeworksLib, Configuration: Debug Win32 ------
1>  ofVbo.cpp
1>..\..\..\openFrameworks\gl\ofVbo.cpp(330): error C2440: '=' : cannot convert from     'ofPtr<ofGLProgrammableRenderer>' to 'bool'
1>          No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
2>------ Build started: Project: projectGenerator, Configuration: Debug Win32 ------
2>LINK : fatal error LNK1104: cannot open file 'C:\Users\Jason\Development\openFrameworks-VS2013\libs\openFrameworksCompiled\lib\vs\openframeworksLibDebug.lib'
========== Build: 0 succeeded, 2 failed, 0 up-to-date, 0 skipped ==========
#2

you really should look at the first error first, not the last error.

“1>…\openFrameworks\gl\ofVbo.cpp(330): error C2440: ‘=’ : cannot convert from ‘ofPtr’ to ‘bool’”

you have somewhere an assignment where you are trying to assign an ofPtr to a bool, which won’t work.

but it’s likely you have not compiled the OF library for debug mode, yet.

#3

I have downloaded a virgin copy of of_v0.8.4_vs_release and attempted a build of the example ‘multiLightExample’. The same error

error C2440: ‘=’ : cannot convert from ‘ofPtr’ to ‘bool’

occurred. so this is something in the main ofx distribution. Is it a known problem?

Actually, the error occurs while building openframeworksLib. From looking at the source, line 330 of ofVbo.cpp should be:

supportVAOs = ofIsGLProgrammableRenderer( );

At least it compiles with that change. Is there a way to submit a bug report?

1 Like
#4

are you compiling with C++11 enabled? the library won’t compile with C++11. Version 0.9.0 will fix this, but it isn’t released yet.

#5

Hello BananasGoMoo,

If you take a close look at the code with the error, it isn’t a C++11 problem. It is actually an incorrect statement. A function returning a pointer is being called (which is incorrect), instead a different function should be used: ofIsGLProgrammableRenderer, which does return the necessary boolean.

Looking in git, code for ofVbo has changed substantially from 8.4 to the latest version, so it may no longer be a problem. But should 8.4 be fixed, or does it matter?

#6

same happen to me.
downloaded the 8.4 version, open the vectorMathExample, compile it in debug.
Using Windows 8.1 and Visual studio 2013 professional.

my first user experience with openFrameworks is a broken build … (not true, but happens with this version now)
i outcommented the line