GCC C ++“Hello World”程序 - > .exe是500kb大编译时在Windows上。如何减小其大小？ [英] GCC C++ "Hello World" program -> .exe is 500kb big when compiled on Windows. How can I reduce its size?

问题描述

我刚刚开始学习C ++ - 我在Windows上使用 nuwen的版本的MingW，使用NetBeans作为IDE（我有在编译这个简单的程序时：

$ b（b）

  #include< iostream> 
 using namespace std; 
 
 int狗，猫，鸟，鱼; 
 
 void f（int pet）{
 cout< pet id number：<宠物< endl; 
} 
 
 int main（）{
 int i，j，k; 
 cout<< f（）：<< （长）& f < endl; 
 cout<< dog：< （长）&狗< endl; 
 cout<< cat：<< （长）& cat< endl; 
 cout<< bird：< （长）&鸟< endl; 
 cout<< fish：< （长）&鱼< endl; 
 cout<< i：< （长）& i< endl; 
 cout<< j：<< （长）& j < endl; 
 cout<< k：< （长）& k < endl; 
} ///：〜
  

我的可执行文件大约是1MB。当我将项目配置从调试更改为发布时，使用-O1 -Os标志（沿着提取调试符号），二进制大小从1MB减少到544KB。 p>

我不是一个大小怪胎，但我只是想知道 - 有什么办法，我可以减少.exe的大小更多？我只是想，这544KB是太多了这么简单的应用程序）。

解决方案

  #include< iostream> 
  

会导致很多标准库被链接，至少与g ++链接。如果你真的关心可执行文件大小，尝试更换所有使用iostreams与printf或类似。这将通常给你一个更小，更快的可执行文件（我有你的下降到约6K），以方便和类型安全为代价。

I just recently started learning C++ - I am using nuwen's version of MingW on Windows, using NetBeans as an IDE (I have also MSDN AA Version of MSVC 2008, though I don't use it very often).

When compiling this simple program:

#include <iostream>
using namespace std;

int dog, cat, bird, fish;

void f(int pet) {
  cout << "pet id number: " << pet << endl;
}

int main() {
  int i, j, k;
  cout << "f(): " << (long)&f << endl;
  cout << "dog: " << (long)&dog << endl;
  cout << "cat: " << (long)&cat << endl;
  cout << "bird: " << (long)&bird << endl;
  cout << "fish: " << (long)&fish << endl;
  cout << "i: " << (long)&i << endl;
  cout << "j: " << (long)&j << endl;
  cout << "k: " << (long)&k << endl;
} ///:~

my executable was about 1MB big. When I changed project configuration from Debug to Release, used -O1 -Os flags ( stripping debugging symbols along the way ), binary size was reduced from 1MB to 544KB.

I am not a "size freak", but I am just wondering - is there any way, that I could reduce .exe size even more? I just think, that 544KB is just too much for such a simple application ).

解决方案

The

#include <iostream>

causes a lot of the standard library to be linked in, at least with g++. If you are really concerned about executable size, try replacing all uses of iostreams with printf or similar. This will typically give you a smaller, faster executable (I got yours down to about 6K) at the cost of convenience and type-safety.

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