gcc可以使用较旧的第三方库编译C ++ 17代码吗？

Question

C++17 has removed several language and library features that were deprecated in C++11.

As a result, some older library headers that utilize exception specifications or register variables outright don't compile.

Does gcc have a flag to allow C++17 code to include features that were removed?

Answer 1

Often, you can get back features removed from the language with -fpermissive . This is does not work for throw specifiers in GCC7, which is arguably a bug, and you should report it as such. After all, -fpermissive enables such goodies as implicit int s.

The register removal results just in a warning for now, easily disabled with -Wno-register .

Answer 2

auto_ptr and register should be warnings. You could get them away with -Wno-register -Wno-deprecated-declarations. I don't know if you could do something about the throw error.