OK, weekend here and just got around to recompiling. However, I end up with four Error 2 messages towards the end and an Error and Warning earlier on (see below):
RCC: Error in 'C:\msys64\home\xxxx\librepilot\ground\gcs\src\plugins\coreplugin\core.qrc': Cannot find file '../../../../../build/gcs-synthetics/AuthorsModel.qml'
Project MESSAGE: Using osg from here: C:/msys64/mingw64
Project MESSAGE: Using osgearth from here: C:/msys64/mingw64
WARNING: Failure to find: gcs_res.o
mingw32-make[4]: *** No rule to make target 'C:/msys64/mingw64/bin/libhogweed-4-1.dll', needed by 'C:/msys64/home/xxxx/librepilot/build/librepilot-gcs_release/bin/libhogweed-4-1.dll'. Stop.
mingw32-make[4]: Leaving directory 'C:/msys64/home/xxxx/librepilot/build/librepilot-gcs_release/src/libs/osgearth'
Makefile:434: recipe for target 'sub-osgearth-make_first-ordered' failed
mingw32-make[3]: *** [sub-osgearth-make_first-ordered] Error 2
mingw32-make[3]: Leaving directory 'C:/msys64/home/xxxx/librepilot/build/librepilot-gcs_release/src/libs'
Makefile:41: recipe for target 'sub-libs-make_first-ordered' failed
mingw32-make[2]: *** [sub-libs-make_first-ordered] Error 2
mingw32-make[2]: Leaving directory 'C:/msys64/home/xxxx/librepilot/build/librepilot-gcs_release/src'
Makefile:40: recipe for target 'sub-src-make_first-ordered' failed
mingw32-make[1]: *** [sub-src-make_first-ordered] Error 2
mingw32-make[1]: Leaving directory 'C:/msys64/home/xxxx/librepilot/build/librepilot-gcs_release'
Makefile:264: recipe for target 'gcs' failed
mingw32-make: *** [gcs] Error 2
I can find 'AuthorsModel.qml' in a version of LibrePilot I downloaded (or compiled) on 27 March. I cannot find 'gcs_res.o' though on my computer.
Any clues as to what I've done wrong?