ok, I got it to compile an executable called ppcx64.exe
however, trying to compile a simple hello world program still give me the error:
fatal: can't find unit system used by hello
You should not try to compile calling ppcx64.exe that resides in the path\to\fpcsource\compiler directory.
Instead, if "make install" worked as expected (no errors), then fpc.exe will be in c:\pp\bin\x86_64 (?) (mine is in i386-win32 subdir, not sure how the 64-bit one is called). Also inside that folder there should be a fpc.cfg file, which a plain "make install" does not create.
Without the fpc.cfg file the compiler will not find any unit at all, not even the system unit.
There is a utility to create a .cfg file, I can't remember exactly what it's called (fpcmkcfg.exe looks like a good candidate, it'll reside in the same folder as fpc.exe), not how to use it.
Or you can just copy the fpc.cfg from your starting compiler (3.0.4) than use search and replace to adjust the paths.
Bart