Please don't hijack other people's threads, start a new one instead of replying to someone else's email. On 19 March 2013 09:54, Arbol One wrote: > Because Qt 4.8.4 requires GCC 4.4.0 I have to use this version of GCC in > my Win7-64bit machine. I doubt it requires 4.4.0, you should try using 4.4.6 instead. > Does this version concurs with the new C++11? GCC 4.4 was released many years before C++11, so no. It has very partial support for some C++11 features, with different semantics to the final standard. > Are there located in the same subdirectory as <string>?where can I find more > information about this version of GCC? http://gcc.gnu.org/onlinedocs/ http://gcc.gnu.org/gcc-4.4/changes.html