Some C++11 features missing when using Code Blocks 13.12, MinGW 4.8.1 and SFML 2.1

问题

Turning to Stack Overflow after exhausting all my efforts.
I'm running Code Blocks 13.12 and MinGW 4.8.1 on a Windows 7 OS 64bit system. I spent two days trying to get the compiler to link (statically) to the SFML 2.1 library. I followed both the SFML tutorial and this video tutorial- reinstalling both Code Blocks and MinGW twice before it finally linked.
After that I was relieved that SFML was recognized, but I got 50 errors when I tried to build and run that suggested C++11 features weren't.
Added -std=gnu++11 to compiler options and 13 of those errors went away.
The remaining errors all fall into two categories: mutex is not a member of std and from time t is not a member of chrono::_V2::steady clock. I'm not even sure what _V2 is.

What am I missing?

-------------- Build: Release in PumpTracker2.0 (compiler: GNU GCC Compiler)---------------

mingw32-g++.exe -Wall -std=gnu++11 -DSFML_STATIC -O2 -std=gnu++11 -IC:\SFML-2.1\include -IC:\SFML-2.1\include -c C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp -o obj\Release\main.o

In file included from C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:25:0:
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\Account.h:37:1: error: 'mutex' in namespace 'std' does not name a type
 std::mutex mu;
 ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\Account.h:86:22: error: 'to_time_t' is not a member of 'std::chrono::_V2::steady_clock'
   time_t currentTp = std::chrono::steady_clock::to_time_t(newly);

C:\Users\WITcom\Desktop\C++\PumpTracker2.0\Account.h:94:48: error: 'from_time_t' is not a member of 'std::chrono::_V2::steady_clock'
   std::chrono::steady_clock::time_point tNew = std::chrono::steady_clock::from_time_t(currentTp);
                                                ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:51:2: error: 'mutex' is not a member of 'std'
  std::mutex mu3;
  ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:51:13: error: expected ';' before 'mu3'
  std::mutex mu3;
             ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:52:19: error: 'mutex' was not declared in this scope
  std::unique_lock<mutex> locker3(mu3, std::defer_lock);
                   ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:52:24: error: template argument 1 is invalid
  std::unique_lock<mutex> locker3(mu3, std::defer_lock);
                        ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:52:33: error: invalid type in declaration before '(' token
  std::unique_lock<mutex> locker3(mu3, std::defer_lock);

C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:214:22: error: 'to_time_t' is not a member of 'std::chrono::_V2::steady_clock'
       pS->tpNewest = std::chrono::steady_clock::to_time_t(NextPump);
                      ^
C:\Users\WITcom\Desktop\C++\PumpTracker2.0\main.cpp:245:51: error: 'from_time_t' is not a member of 'std::chrono::_V2::steady_clock'
       std::chrono::steady_clock::time_point TT2 = std::chrono::steady_clock::from_time_t(pS->tpNewest);
                                                   ^
Process terminated with status 1 (0 minute(s), 4 second(s))
37 error(s), 47 warning(s) (0 minute(s), 4 second(s))

回答1:

As already mentioned the original MinGW distribution is not the best one to go with, if you want to go with up-to-date features. Instead there are projects like Nuwen (Stephan T. Lavavej's website) as well as MinGW Builds that provide MinGW-w64 binaries.

The mentioning of SFML is misleading, since the problems have nothing to do with SFML at all. Keep in mind however that you'll have to rebuild SFML if you change the compiler!

As a next step, it would've been important to post a minimal example of the source code that reproduces the errors, because right now, we can only guess what's going wrong, based on the errors.

If you don't use the GNU extensions explicitly, you should use -std=c++11 instead of -std=gnu++11 and if you look at the build command, you'll notice that it's included twice, which is not necessary.

And now to some guessing about the errors:

Account.h - Make sure the <mutex> header is included.
main.cpp - Make sure the <mutex> header is included.
main.cpp - If std::unique_lock<mutex> is from your code, then you need to add std::, i.e. std::unique_lock<std::mutex>.
main.cpp - time_t things seem to be resolved, but make sure anyways to include <chrono> and <ctime> (since time_t is defined in <ctime>).

来源：https://stackoverflow.com/questions/21075852/some-c11-features-missing-when-using-code-blocks-13-12-mingw-4-8-1-and-sfml-2

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c++11

mingw

codeblocks

sfml