问题
Implementation-defined behaviors in C are unspecified behaviors for which each conforming implementation must document its choice.
I found such documentations easily for gcc here or Microsoft C here, but I can't find any such documentation for clang.
Am I searching wrong or is there no such thing?
回答1:
This ticket https://bugs.llvm.org/show_bug.cgi?id=11272 is still opened (for many years now) so it seems that clang doesn't explicitly specify implementation defined behaviour.
For most cases I would bet that it's the same as GCC, though.
来源：https://stackoverflow.com/questions/36335071/where-does-clang-document-implementation-defined-behavior