When I try to type ρ (rho) with rough breathing, it just beeps and nothing happens. Capital rho and lowercase rho occurs with rough breathing esp. at the beginning of a word like "rhetor", and it'd be great to be able to type that, instead of copying it from a character map.
P.S. I tried my hand at patching, but simply adding the lines
GDK_h, GDK_R, 0, 0, 0, 0x1FEC, /* GREEK CAPITAL LETTER RHO WITH DASIA *
/
GDK_h, GDK_r, 0, 0, 0, 0x1FE5, /* GREEK CAPITAL LETTER RHO WITH DASIA *
/
into classicalgreek_compose_seqs[] didn't work---I must be missing something else that's not obvious to me.