CMake compiling error and core dumped

[ana-GT]

I checked out grip2 and tried to install it on my workstation (Ubuntu 12.04, 64 bits).

INSTALLATION ISSUES :

ISSUE 1:

CMake was not able to find QGLWidget:

/usr/local/include/osgQt/GraphicsWindowQt:24:21: fatal error: QGLWidget: No such file or directory

PROPOSED FIX 1:

Line 35 of grip2/CMakeLists.txt: Add QtOpenGL as a required module:

find_package(Qt4 COMPONENTS QtCore QtGui Qt3Support QtXml QtOpenGL REQUIRED)

ISSUE 2:

Linking error (probably due to my 64-bit machine)

Linking CXX executable grip [ 95%] Building CXX object CMakeFiles/grip-core.dir/qtWidgets/src/TreeView.cpp.o /home/ana/Software/grip2/include/gripTime.h:86: error: undefined reference to 'clock_gettime'

PROPOSED FIX 2:

Add rt in the library linking on grip2/CMakeLists.txt, line 86

target_link_libraries(mainWindow ${project_libs} ${DART_LIBRARIES} rt )

EXECUTION ERROR

I was able then to compile and install. However, when I try to run grip, I get this ugly core dumped error:

`ObjectWrapperManager::addCompressor(): 'null' already exists. ObjectWrapperManager::addCompressor(): 'zlib' already exists.

Threading model: 4 -- CullThreadPerCameraDrawThreadPerContext grip: malloc.c:3801: _int_malloc: Assertion (unsigned long)(size) >= (unsigned long)(nb)' failed. Aborted (core dumped)

---

Any idea about how to fix it would be greatly appreciated.

[mxgrey]

With respect to the clock_gettime error, I think we should use QTime instead of our own home-brewed cross-platform solution. As long as we're using Qt packages, we may as well take full advantage of it.

The run-time issue looks like a memory leak problem. I guess someone is going to need to valgrind it. Is there something in particular you're doing which produces this error, or does it just pop up shortly after execution?

[petevieira]

I agree with the you about QTime, since it does get down to ms resolution.

I'll have plenty of time tomorrow to debug this.

-Pete

On Tue, Apr 29, 2014 at 11:21 AM, Michael Grey notifications@github.comwrote:

With respect to the clock_gettime error, I think we should use QTime instead of our own home-brewed cross-platform solution. As long as we're using Qt packages, we may as well take full advantage of it.

The run-time issue looks like a memory leak problem. I guess someone is going to need to valgrind it. Is there something in particular you're doing which produces this error, or does it just pop up shortly after execution?

— Reply to this email directly or view it on GitHubhttps://github.com/golems/grip2/issues/35#issuecomment-41690232 .

Peter Vieira Masters Student Electrical & Computer Engineering Center for Robotics & Intelligent Machines Georgia Institute of Technology Pete.Vieira@gmail.com "I'm gonna be a ramblin' wreck from Georgia Tech and a hell of an engineer"

[petevieira]

Hey Ana,

Do you think you could run it in GDB and send me the backtrace?

Thanks,

Pete

On Tue, Apr 29, 2014 at 12:50 PM, Peter Vieira pete.vieira@gmail.comwrote:

I agree with the you about QTime, since it does get down to ms resolution.

I'll have plenty of time tomorrow to debug this.

-Pete

On Tue, Apr 29, 2014 at 11:21 AM, Michael Grey notifications@github.comwrote:

With respect to the clock_gettime error, I think we should use QTime instead of our own home-brewed cross-platform solution. As long as we're using Qt packages, we may as well take full advantage of it.

The run-time issue looks like a memory leak problem. I guess someone is going to need to valgrind it. Is there something in particular you're doing which produces this error, or does it just pop up shortly after execution?

— Reply to this email directly or view it on GitHubhttps://github.com/golems/grip2/issues/35#issuecomment-41690232 .

Peter Vieira Masters Student Electrical & Computer Engineering Center for Robotics & Intelligent Machines Georgia Institute of Technology Pete.Vieira@gmail.com "I'm gonna be a ramblin' wreck from Georgia Tech and a hell of an engineer"

Peter Vieira Masters Student Electrical & Computer Engineering Center for Robotics & Intelligent Machines Georgia Institute of Technology Pete.Vieira@gmail.com "I'm gonna be a ramblin' wreck from Georgia Tech and a hell of an engineer"

[petevieira]

The execution error was due to the user installing openscenegraph from source, which was an incompatible version. I verified which versions of openscenegrah are compatible with grip2 and adjusted the CMakeLists.txt to check for compatibility.

The time issue was temporarily fixed by adding rt as a dependency for the target, but QTime should probably be used. The precision of QTime is only milliseconds as opposed to clock_gettime's nanosecond precision, but that should suffice.