+ [ "$IS_MAC" = "false" ] && LINK="$LINK -Wl,--no-undefined -flto -Wl,-O3 -Wl,--lto-O3"
+ [ "$IS_MAC" = "false" ] && COMPILE="$COMPILE -flto"
+ [ "$IS_MAC" = "true" -a "$IS_APPLE_CLANG" = "false" ] && LINK="$LINK -flto -Wl,-O3 -Wl,--lto-O3"
+ [ "$IS_MAC" = "true" -a "$IS_APPLE_CLANG" = "false" ] && COMPILE="$COMPILE -flto"