C library in C++ program?

[Kernel Sanders]

I'm writing a program for class, and given the task (it's a computer graphics class) C++ is much easier to work with. I have everything ported and compiling in C++, but the instructors gave us a library used to create tiff screenshots, and it was compiled with gcc for C programs. Google says that g++ can't link to gcc created libraries, but it would be very annoying to have to use C just for this one tangential routine, which we don't even have to code ourselves. Is there any way to get g++ to link to the library?

[robwhit]

Google says that g++ can't link to gcc created libraries

Really? I doubt that. Where did you get that?

http://www.parashift.com/c++-faq-lit...c-and-cpp.html

[Kernel Sanders]

Really? I doubt that. Where did you get that?

http://www.parashift.com/c++-faq-lit...c-and-cpp.html

Not mixing C code with C++ code, using a gcc compiled C library in a g++ compiled C++ program

[robwhit]

//C++
extern "C" {
#include <c_header.h>
}

#include <iostream>

int main()
{
   std::cout << "I'm in C++\n" ;
   c_function ();
}

g++ file.cpp -lc_lib

That doesn't work?

[tabstop]

Not mixing C code with C++ code, using a gcc compiled C library in a g++ compiled C++ program

What's the difference? (What is a C library if not a big pile of C code?)

[matsp]

In fact, g++ automatically links to the standard glibc (or whatever C library the compiler normally links to, e.g. the Windows Standard library). This is done so that you can use C functions such as strcpy, rand, printf etc.

Yes, it very much CAN do that. You need to tell the compiler that the code you are linking to is C rather than C++ with extern "C" ..., but aside from that, it's a no-brainer.

--
Mats

[Kernel Sanders]

I found the problem, and it was a pretty common one. Apparently the programmer (me) is an idiot. It works fine even without the extern C declaration - there was a standard library that the given library needed, and I wasn't including it

[matsp]

I found the problem, and it was a pretty common one. Apparently the programmer (me) is an idiot. It works fine even without the extern C declaration - there was a standard library that the given library needed, and I wasn't including it

Yup, that'll do it.

--
Mats