Question

I’m trying to set windows programming enviroment for c++. I use the Visual Studio to write the code but my University wants me to use g++ compiler. So far I managed to link g++ with the PATH using cmd but that’s not all. I have to use an alias which in linux is:

p1++="g++ -ansi -Wall -O2 -DNDEBUG -Wextra -Werror -Wno-uninitialized -Wno-sign-compare -Wshadow

I tried the same using the command doskey:

doskey p1=g++ -ansi -Wall -O2 -DNDEBUG -Wextra -Werror -Wno-uninitialized -Wno-sign-compare -Wshadow

and it works but whenever I use for example:

p1++ hello.cpp

it says

g++: fatal error: no input files
compilation terminated.

but if i use:

g++ hello.cc

It does compile, so my question is what does all that code mean and how can I get rid of that error?

Thanks

Answer 1

test.cpp (assumed to exist at C:\test.cpp):

#include <iostream>
int main(void) { std::cout << "hello" << std::endl; return 0; }

Here’s what it looks like in my Windows CMD prompt:

NOTE: No quotes in alias, and it is assumed that g++ is already in your PATH.

C:\>set p1++=g++ -ansi -Wall -O2 -DNDEBUG -Wextra -Werror -Wno-uninitialized -Wno-sign-compare -Wshadow

C:\>%p1++%
g++: fatal error: no input files
compilation terminated.

C:\>%p1++% test.cpp

C:\>a.exe
hello

C:\>doskey p1++=%p1++% $*

C:\>p1++ test.cpp

C:\>a.exe
hello

If you wanted to have the %p1++% environment variable persist across CMD prompts then you’d need to add an environment variable to your Windows User Profile.

On Windows 7:

Control Panel => System => Advanced System Settings => Environment Variables.

Create a new User Variable with name = p1++ and value = g++ -ansi -Wall -O2 -DNDEBUG -Wextra -Werror -Wno-uninitialized -Wno-sign-compare -Wshadow.