The strto* family was introduced in android O (API Level 26). However, the support headers were adjusted to indicate that all locale aware functions were added in L. Provide stubs for the locale aware strto* family until O. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@330045 91177308-0d34-0410-b5e6-96231b3b80d8