CODEWITHSUNDEEP
g++
罗泽轩
罗泽轩

Reputation: 1673

Which option should I use to make g++ to recognize 'nullptr'?

When using g++ to compile the .cpp file, I got the error like this :

  xx.cpp:25:5: error:'nullptr' was not declared in this scope.
  # the error is translated by me :)

The 'nullptr' is added just in C++11. I guess the default version in g++ may be the old version, so g++ can not recognize 'nullptr'. (My g++ version is 4.6.3) Instead, I added -std=c++0x before the .cpp file, but it still not worked. Then I seeked in the gcc manual,only find nothing relevant to the trouble.

Therefore, I hope someone here can answer my question, thank for any help.

Upvotes: 0

Views: 349

Answers (1)

user2578223
user2578223

Reputation:

If nullptr is only recognised in C++11, why would you compile with C++0x?

Use -std=c++11 when you compile: g++ -std=c++11 xx.cpp

Upvotes: 1

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