app-emulation/virtualbox ccache.conf
dev-lang/spidermonkey    ccache.conf
dev-util/cmake           ccache.conf
mail-client/thunderbird  ccache.conf
media-gfx/gimp           ccache.conf
media-libs/mesa          ccache.conf
media-video/ffmpeg       ccache.conf
#net-im/telegram-desktop  ccache.conf # does not work
net-libs/nodejs          ccache.conf
sys-devel/clang          ccache.conf
sys-devel/llvm           ccache.conf
sys-libs/glibc           ccache.conf
www-client/chromium      ccache.conf
www-client/firefox       ccache.conf
x11-libs/gtk+            ccache.conf