This is an auto-filled bug because this package does not respect system's CC and calls directly cc/gcc or similar. cc -I/usr/X11R6/share/include -march=native -Wformat -Werror=format-security -g0 -O2 -c -Wall wmpop3.c -o wmpop3.o
Wow, it had been some time since I had to fix a direct cc call :) Fixed in current 0.5.6a-r1 ebuild