Xcode 9 now enables CLANG_WARN_STRICT_PROTOTYPES by default. This update ObjC function prototypes with no params from FOUNDATION_EXPORT Something* DoSomething(); to FOUNDATION_EXPORT Something* DoSomething(void); Change-Id: I23b1d3e70a2ede2d2d77951ffe8a1a9598a1b7a0 Reviewed-on: https://go-review.googlesource.com/68970 Reviewed-by: Elias Naur <elias.naur@gmail.com>