Jan Djärv <address@hidden> writes:
FWIW, Gtk+ has a special handling of this. Gtk+ also processes all
compose itself, rather than using X. See Gtk+ sources,
modules/input/imcedilla.c:
/* The difference between this and the default input method is the handling
* of C+acute - this method produces C WITH CEDILLA rather than C WITH ACUTE.
* For languages that use CCedilla and not acute, this is the preferred mapping,
* and is particularly important for pt_BR, where the us-intl keyboard is
* used extensively.
*/
Since Emacs does not use Gtk+ for character input, we don't get that mapping.
According to /usr/share/X11/locale/pt_BR.UTF-8/Compose, <dead_acute> <C>
produces "Ç", not "Ć".