The website says one can only make this with qt5-devel. So I installed it.
Went to 'make' again.
This time a lengthy, long compile---far longer than the last abort---, aborted at the end:
dec_png.c:8:10: fatal error: png.h: No such file or directory
#include <png.h>
^~~~~~~
compilation terminated.
make[1]: *** [makefile:89: libg2c.a(dec_png.o)] Error 1
make[1]: Leaving directory '/home/brent/Downloads/zyGrib-8.0.1/src/g2clib'
make: *** [Makefile:46: zyGrib] Error 2
All it takes is a missing file I guess. Stopping now. Ciao.