CODEWITHSUNDEEP
c++ios
KudoCC
KudoCC

Reputation: 6952

Is it safe to link 2 different standard c++ library in one project

I'm building my iOS project with linking errors. My project links against some third-party static libraries. They use different standard c++ library, one is libstdc++, the other is libc++.

Link against either one will cause the linking errors in other lib, so I link both of them in my target, the command line is -lstdc++ -lc++.

Now it build successfully, but I wonder if it will cause some runtime error, can anybody explain about this ? Thanks in advance.

Upvotes: 3

Views: 196

Answers (1)

John Zwinck
John Zwinck

Reputation: 249333

No, it is not safe. In fact, it is a direct violation of the One Definition Rule (ODR). The ODR says, among other things, that you can have at most one definition of any non-inline function in an entire program. You will violate this rule by linking two different implementations of the standard library.

Upvotes: 4

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