$(patsubst /%,C:/cygwin/%,
$(patsubst /usr/bin/%,C:/cygwin/bin/%,
$(patsubst /usr/lib/%,C:/cygwin/lib/%,
$(patsubst /cygdrive/C/%,C:/%,
$(patsubst /cygdrive/D/%,D:/%,
$(patsubst /cygdrive/c/%,C:/%,
$(patsubst /cygdrive/d/%,D:/%,
$1)))))))