Failure to Compile on Arch Linux

[georgewsinger]

Problem: I am running Arch Linux and cannot get motorcar to compile.

What I've attempted: I have followed the build instructions (using the build.sh) to no avail. In addition, I attempted to compile everything myself from scratch (as per the README); that didn't work either.

Error messages: I have come across the 3 following issues (which are probably all related):

1. Using ./build.sh, I cannot get the simple-compositor to compile. Instead, I get a bunch of undefined references to qt5 objects (even though, as far as I know, I have successfully built qt5). Here is the top of the error output:

   g++  main.cpp  -std=c++11  -I../../../../src/compositor -I../../../../src/protocol -I../../../../src/device -L../../../../lib -lmotorcar-compositor  -o simple-compositor 
   ../../../../lib/libmotorcar-compositor.so: undefined reference to `QGuiApplication::primaryScreen()@Qt_5'
   ../../../../lib/libmotorcar-compositor.so: undefined reference to `QSurfaceFormat::setDepthBufferSize(int)@Qt_5'
   

2. I can get the motorcar-demo-client to compile without error; however, when I run run-motorcar-demo-client.sh, I get the following:

   motorcar-demo-client: simple-egl.cpp:1593: int main(int, char**): Assertion `display.display' failed.
   ./run-motorcar-demo-client.sh: line 1: 15560 Aborted                 (core dumped) /home/user/motorcar/src/examples/clients/simple-egl/motorcar-demo-client
   

3. Finally, when I attempt to compile motorcar from scratch, I think that qtwayland is failing to install. In particular, during the build steps outlined in the README, the qtwayland directory seems to be empty! See below for what I mean (these instructions are copied from the motorcar README):

   $ git clone git://code.qt.io/qt/qt5.git qt5
   $ cd qt5
   $ git checkout 5.5
   $ ./init-repository --no-webkit  --module-subset=qtbase,qtjsbackend,qtdeclarative,qtwayland
   $ cd qtbase
   $ git checkout 5.5
   $ cd ../qtwayland # here, the qtwayland directory is empty
   $ git checkout 5.5 # after running this command, the qtwayland directory remains empty
   $ cd ../
   $ ./configure -prefix /opt/qt5  -debug -confirm-license -opensource -egl -opengl -no-xcb-xlib
   $ cd qtwayland # this directory is still empty!
   $ git clean -fdx
   $ ../qtbase/bin/qmake CONFIG+=wayland-compositor # this doesn't work
   $ cd ../
   $ make
   $ make install
   

As a workaround, I tried to git clone the current qtwayland repo (from the qt website) into qt5/qtwayland and follow the instructions as above. This didn't work.

What do?

PS -- I read Forrest's masters thesis. Am looking forward to tinkering on motorcar if I can get it to build.