Commits
Gil authored and GitHub committed a5727ac00e5
Cache ccache output (#4611) This should reuse object files from unchanged sources between builds. This brings a rebuild of the Firestore CMake build down from 20 min 37 sec, to 9 min 13 sec: * Before: https://travis-ci.org/firebase/firebase-ios-sdk/jobs/635423433 * After: https://travis-ci.org/firebase/firebase-ios-sdk/jobs/635295223 #no-changelog