Eclipse - C++ hello world project's error

13
votes

I am using a 64-bit Winodws 7. I've downloaded a CDT Eclipse and have downloaded MinGW. After that, I created a c++ hello world project. This is the code:

#include <iostream>
using namespace std;

int main() {
    cout << "!!!Hello World!!!" << endl; // This is supposed to print "Hello World!!!"
    return 0;
}

But when I want to run it, this error pops up: "Launch failed. Binary not found."

Any help would be highly welcomed.

6
c++eclipsewindows-7binary
does your project compile? :) - ascanio
@forsvarir There is no answer there - Masoud
Rather long winded dicussion about setting up eclipse for windows can be found here (apparently it doesn't always recognise .EXE as executable or something): codingrecipes.com/… - forsvarir
It is not helpful. I read it. - Masoud
That's quite the bold statement, "it is not helpful". Instead of shifting blame, perhaps try harder to understand. - Blindy

6 Answers

3
votes

You have to "Build" your project before you can "Run" it. When using Eclipse for Java, you simply click the "Run" icon, then Eclipse will automaticly compile your program and then run it. With C++ however, this is for whatever reason not the case. Instead of just clicking the "Run" icon, you need to click the "Build" icon first. This is where Eclipse will create a makefile and compile your program. Then you can run it by clicking the "Run" icon.

I hope this solves your problem.

2
votes

Has eclipse built the EXE file correctly for you? Look for helloworld.exe or whatever, and try running it from a Windows Command prompt.

If not, then you've got a problem with your build. Build it again and check for errors.

If the EXE file is there, but cannot be run from within Eclipse then check that the PE Windows Binary Parser is enabled for your project.

UPDATE: To fix "Unresolved Inclusion" errors, see here. In particular, try this:

  1. Right-click on the probject and select "Properties"
  2. Go to "C/C++ General" -> "Paths and Symbols" and select "Includes" tab
  3. Select "GNU C++"
  4. Press on "Add..."
  5. Look for the folder "C:\dev\eclipse\mingw\lib\gcc\mingw32\4.4.1-dw2\include\c++" or similar

UPDATE See also this link:

http://wiki.eclipse.org/CDT/User/FAQ#I_am_using_a_non_gnu_compiler_and_I_get_the_following_messages:_.22Error_launching_external_scanner_info_generator_.28gcc_-E_-P_-v_-dD.22_and_.22File_not_indexed_because_it_was_not_built_.22._How_do_I_get_rid_of_them.3F

2
votes

The problem is because you Windows is 64 bit and Eclipse just sort of chooses to ignore executables in this format without reporting any error. Pretty convenient, huh? Try this to fix it:

Right-click your project -> Properties -> expand "MinGW C++ Liker" in the right side pane and select the Miscellaneous option

Under "Other options" you will add a new option:

-arch=i386

Rebuild your application, refresh, and you should see a Binaries folder that contains your executable. You can run it by going to Run As -> Local C/C++ Application

0
votes

First check the toolchain selected,while creating the new c++ project.It should be MinGW as you have stated,(hope you have made the entries in the environmental variables).Write the code .press ctrl+b to build the workspace. Rt click the project and select clean project.press f5 to refresh.then ctrl+f11 to run your prg.Hope this helps..

0
votes

Make sure you select the correct Toolchain when you create the project.

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-1
votes

This happens due to windows execution permission (I assume that you're running eclipse from an external drive or from another partition), if you run eclipse as an administrator you will be able to debug your application without problems..