C++'s “inline” - how strong a hint is it for GCC and Clang/LLVM?

In C++, the keyword "inline" serves two purposes. First, it allows a definition to appear in multiple translation units. Second, it's a hint to the compiler that a function should be inlined in the compiled code.

My question: in code generated by GCC and Clang/LLVM, does the keyword "inline" have any bearing on whether a function is inlined? If yes, in what situations? Or is the hint completely ignored? Note this is a not a language question, it is a compiler-specific question.