why i cannot use the auto keyword in the last version of gcc

Question

All, recently i tried to use the new features supported by c++11, and i wrote such statement however the compiler ran failed.

auto x = 1; 

the report error listed below:

D:\DEV\CBCppTest\main.cpp||In function 'int main()':| D:\DEV\CBCppTest\main.cpp|22|warning: 'auto' changes meaning in C++11; please remove it [-Wc++0x-compat]| D:\DEV\CBCppTest\main.cpp|22|error: 'x' does not name a type| ||=== Build finished: 1 errors, 1 warnings ===| 

Why the last gcc version 4.7.0 on MinGW cannot support the this statement. But the compiler of vs10 passed. Could anyone know the reason for this issue?

Answer 1

"GCC provides experimental support for the 2011 ISO C++ standard. This support can be enabled with the -std=c++11 or -std=gnu++11 compiler options; the former disables GNU extension."

It comes from here: c+11 support