We need to see that it all works,Qt 5.12 will use clang by default
[ ] poppler >= 0.69 requires the LLVM STL rather than the deprecated GCC one, probably more to follow in the future. including newer versions of poppler that didn't compile.
How do we deal with this/can we switch entirely/what are the side-effects of switching?
[ ] TODO Aleix will see to build Qt 5.12 + Clang docker to start testing the future
[ ] TODO Aleix and Albert see how to use the SDK to build poppler for Android