传递GCC标志-std = c ++ 11 CXXFLAGS或CXX或CFLAGS [英] passing GCC flag -std=c++11 CXXFLAGS or CXX or CFLAGS

问题描述

我真的需要一些帮助，在这里一个基本的问题。我将永远放弃学习GCC，因为它似乎基本只是对我没有意义。我已经读了几百篇文章，不能弄清楚如何获得一个基本的 -std = c ++ 11 调用工作通过 configure

在这个例子中，我编译了gcc 5.3和大多数程序编译ok，例如编译httpd从源工程没有问题。但我不断收到我认为是 -std = c ++ 11 的错误。我读过的所有帖子都表示通过 -std = c ++ 11 ，我试过了

  CXXFLAGS = -std = c ++ 11 
 CXX = -std = c ++ 11 
 CFLAGS = -std = c ++ 11 
  
 
 
 
但错误仍然存​​在。
 
 
 
我现在正在尝试编译aspell，以下错误
 在/ home / mybin / include / algorithm：62：0，
 /home/atmp/aspell-0.60.6.1/common/string.hpp:13，
来自/home/atmp/aspell-0.60.6.1/common/indiv_filter.hpp:12，
来自/ home /atmp/aspell-0.60.6.1/modules/filter/email.cpp:9：
 /home/mybin/include/bits/stl_algo.h：在函数'void std :: random_shuffle（_RAIter，_RAIter）' ：
 /home/mybin/include/bits/stl_algo.h:4448:8：错误：'rand'不是'std'的成员
 + std :: rand（）％（（__i -  __first）+ 1）; 
  
 算法似乎已从gcc5.3编译。 
请指出正确的方向来排查这些类型的错误。
 
 
 
编译GCC时，我错过了编译选项吗？
 $ b $在< cstdlib>中定义 
解决方案
  std :: rand  code>，它与C ++ 11无关，这个头很久以前就有了。检查源中是否 #include  d。
 
I really need some help with a basic question here please. I am about to give up forever on learning GCC as it seems like the basics just do not make sense to me. I have read hundreds of posts and can not figure out how to get a basic -std=c++11 call to work passed via configure

In this example I have compiled gcc 5.3  and most programs compile ok, for example compiling httpd from source works no problems. But I keep getting errors relating to what I think is -std=c++11. All the posts I read say to pass -std=c++11 and I have tried 
CXXFLAGS=-std=c++11 
CXX=-std=c++11 
CFLAGS=-std=c++11
but the errors persist.

I am now attempting to compile aspell, and get the following error,
In file included from /home/mybin/include/algorithm:62:0,
                 from /home/atmp/aspell-0.60.6.1/common/string.hpp:13,
                 from /home/atmp/aspell-0.60.6.1/common/indiv_filter.hpp:12,
                 from /home/atmp/aspell-0.60.6.1/modules/filter/email.cpp:9:
/home/mybin/include/bits/stl_algo.h: In function ‘void std::random_shuffle(_RAIter, _RAIter)’:
/home/mybin/include/bits/stl_algo.h:4448:8: error: ‘rand’ is not a member of ‘std’
      + std::rand() % ((__i - __first) + 1);
algorithm seems to have installed correctly from the gcc5.3 compile. 
Please point me in the right direction to troubleshoot these types of errors.

Did I miss a compile option when compiling GCC?
解决方案
std::rand is defined in <cstdlib>, and it has nothing to do with C++11, this header was there a long time ago. Check that it is #included in the source.

                        
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