undefined reference to `std::ios_base::Init::Init()'

You can resolve this in several ways:

This is a linker problem, not a compiler issue. The same problem is covered in the question iostream linker error – it explains what is going on.

c matrix coredump

Most of these linker errors occur because of missing libraries.

I added the libstdc++.6.dylib in my Project->Targets->Build Phases-> Link Binary With Libraries.

That solved it for me on Xcode 6.3.2 for iOS 8.3

Cheers!

c matrix coredump

g++ is equivalent togcc -xc++ -lstdc++ -shared-libgcc

I was getting a similar error while using sizeof() method. By using g++ or above tags with gcc, the code got compiled.

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