Comment by beyondCritics

With gcc [1] and clang [2] you always had the option "-foptimize-sibling-calls", to get away with tail calls even for debug builds. Of course having this standardized, guaranteed and at the function level is a huge improvement.

[1] https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html [2] https://clang.llvm.org/docs/ClangCommandLineReference.html#t...