ref: ef596514f90ad4e2f481514f64797f76cd8f5ed3 dir: /sys/src/libc/port/runestrcat.c/
#include <u.h> #include <libc.h> Rune* runestrcat(Rune *s1, Rune *s2) { runestrcpy(runestrchr(s1, 0), s2); return s1; }