CXX network/fldigi-xmlrpc.o
In file included from network/xmlrpc.cxx:80:
./include/confdialog.h:28:10: fatal error: FL/Fl_Tree.H: No such file or directory
28 | #include <FL/Fl_Tree.H>
| ^~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [Makefile:5452: network/fldigi-xmlrpc.o] Error 1
make[3]: Leaving directory '/home/jrlav/Downloads/fldigi-4.1.27/src'
make[2]: *** [Makefile:8792: install-recursive] Error 1
make[2]: Leaving directory '/home/jrlav/Downloads/fldigi-4.1.27/src'
make[1]: *** [Makefile:9122: install] Error 2
make[1]: Leaving directory '/home/jrlav/Downloads/fldigi-4.1.27/src'
make: *** [Makefile:471: install-recursive] Error 1