Thanks David
Still no go...
.. /usr/lib/aarch64-linux-gnu/libQt5Gui.so.5.9.5 /usr/lib/aarch64-linux-gnu/libQt5Core.so.5.9.5
/usr/bin/ld: /usr/lib/gcc/aarch64-linux-gnu/7/../../../aarch64-linux-gnu/libnova.a(julian_day.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `__stack_chk_guard@@GLIBC_2.17' which may bind externally can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /usr/lib/gcc/aarch64-linux-gnu/7/../../../aarch64-linux-gnu/libnova.a(julian_day.o)(.text+0x4): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `__stack_chk_guard@@GLIBC_2.17'
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
src/CMakeFiles/XyGrib.dir/build.make:2848: recipe for target 'src/XyGrib' failed
make[2]: *** [src/XyGrib] Error 1
make[2]: Leaving directory '/home/pytheas/XyGrib/build'
CMakeFiles/Makefile2:102: recipe for target 'src/CMakeFiles/XyGrib.dir/all' failed
make[1]: *** [src/CMakeFiles/XyGrib.dir/all] Error 2
make[1]: Leaving directory '/home/pytheas/XyGrib/build'
Makefile:132: recipe for target 'all' failed
make: *** [all] Error 2