"cmake .." fails with missing declarations for "Q_WS_MAC", "Q_WS_WQS", "Q_WS_X11" and "Q_WS_WIN"

[alikureishy]

Hi.

I have a Ubuntu 18.04 box, with a NVidia GPU installed as well.

I'm trying to build this project as per the steps below that are listed in the repository's README.md. But I am getting errors with the cmake command below (tagged with '<===')...

$ sudo apt-get install cmake
$ git clone http://github.com/udacity/RoboND-DeepRL-Project
$ cd RoboND-DeepRL-Project
$ git submodule update --init
$ mkdir build 
$ cd build 
$ cmake ../            <========== THIS STEP FAILS###### 
$ make

The error log contains this information:

Determining if the Q_WS_WIN exist failed with the following output:
Change Dir: /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_f9c7e/fast"
/usr/bin/make -f CMakeFiles/cmTC_f9c7e.dir/build.make CMakeFiles/cmTC_f9c7e.dir/build
make[1]: Entering directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_f9c7e.dir/CheckSymbolExists.cxx.o
/usr/bin/c++   -I/usr/include/qt4  -std=c++11    -o CMakeFiles/cmTC_f9c7e.dir/CheckSymbolExists.cxx.o -c /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: In function ‘int main(int, char**)’:
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: error: ‘Q_WS_WIN’ was not declared in this scope
   return ((int*)(&Q_WS_WIN))[argc];
                   ^~~~~~~~
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: note: suggested alternative: ‘Q_WS_X11’
   return ((int*)(&Q_WS_WIN))[argc];
                   ^~~~~~~~
                   Q_WS_X11
CMakeFiles/cmTC_f9c7e.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_f9c7e.dir/CheckSymbolExists.cxx.o' failed
make[1]: *** [CMakeFiles/cmTC_f9c7e.dir/CheckSymbolExists.cxx.o] Error 1
make[1]: Leaving directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_f9c7e/fast' failed
make: *** [cmTC_f9c7e/fast] Error 2

File /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:
/* */
#include <QtCore/qglobal.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef Q_WS_WIN
  return ((int*)(&Q_WS_WIN))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the Q_WS_QWS exist failed with the following output:
Change Dir: /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_84756/fast"
/usr/bin/make -f CMakeFiles/cmTC_84756.dir/build.make CMakeFiles/cmTC_84756.dir/build
make[1]: Entering directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_84756.dir/CheckSymbolExists.cxx.o
/usr/bin/c++   -I/usr/include/qt4  -std=c++11    -o CMakeFiles/cmTC_84756.dir/CheckSymbolExists.cxx.o -c /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: In function ‘int main(int, char**)’:
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: error: ‘Q_WS_QWS’ was not declared in this scope
   return ((int*)(&Q_WS_QWS))[argc];
                   ^~~~~~~~
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: note: suggested alternative: ‘Q_WS_X11’
   return ((int*)(&Q_WS_QWS))[argc];
                   ^~~~~~~~
                   Q_WS_X11
CMakeFiles/cmTC_84756.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_84756.dir/CheckSymbolExists.cxx.o' failed
make[1]: *** [CMakeFiles/cmTC_84756.dir/CheckSymbolExists.cxx.o] Error 1
make[1]: Leaving directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_84756/fast' failed
make: *** [cmTC_84756/fast] Error 2

File /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:
/* */
#include <QtCore/qglobal.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef Q_WS_QWS
  return ((int*)(&Q_WS_QWS))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the Q_WS_MAC exist failed with the following output:
Change Dir: /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_2a59e/fast"
/usr/bin/make -f CMakeFiles/cmTC_2a59e.dir/build.make CMakeFiles/cmTC_2a59e.dir/build
make[1]: Entering directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_2a59e.dir/CheckSymbolExists.cxx.o
/usr/bin/c++   -I/usr/include/qt4  -std=c++11    -o CMakeFiles/cmTC_2a59e.dir/CheckSymbolExists.cxx.o -c /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: In function ‘int main(int, char**)’:
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: error: ‘Q_WS_MAC’ was not declared in this scope
   return ((int*)(&Q_WS_MAC))[argc];
                   ^~~~~~~~
/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: note: suggested alternative: ‘Q_WS_X11’
   return ((int*)(&Q_WS_MAC))[argc];
                   ^~~~~~~~
                   Q_WS_X11
CMakeFiles/cmTC_2a59e.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_2a59e.dir/CheckSymbolExists.cxx.o' failed
make[1]: *** [CMakeFiles/cmTC_2a59e.dir/CheckSymbolExists.cxx.o] Error 1
make[1]: Leaving directory '/data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_2a59e/fast' failed
make: *** [cmTC_2a59e/fast] Error 2

File /data/code/RoboND-DeepRL-Project/build/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:
/* */
#include <QtCore/qglobal.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef Q_WS_MAC
  return ((int*)(&Q_WS_MAC))[argc];
#else
  (void)argc;
  return 0;
#endif
}

I can't proceed to the 'make' step without getting past these errors. Is there any way to fix/resolve these references?

Thanks in advance!