Link gcc libs with g++

[Woltan]

Hello,
I have a problem concerning the linking of a library built with gcc using g++. The linker error message is:
undefined reference to 'some_function(char*)'

The linking command looks like this:
g++ -Llibs -o"dev" ./src/Parameter.o -lp_io
where p_io is the library I am trying to link to my program. Since I have almost no detailed experience with linkink here is the filename of that lib:
libp_io.a

Is it possible to link a file that was built using gcc with g++? Any help, link, article or posting is appreciated!!
Thx in advance
Cherio Woltan

[moorecm]

http://www2.research.att.com/~bs/bs_faq2.html#callC

[Woltan]

Hey moorecm,
thx for that cool link. Unfortunatly, I do not have the option of recompiling the C code. Is there any other way, that I can tell the linker: "Here is a gcc compiled lib, ... deal with it!".
Again any help is apreciated!
cherio Woltan

[coder777]

maybe the path is missing and so the linker can't find the lib

[Woltan]

I can sort that out, since I first had the path wrong and the linker complained about it. Then I fixed it and now it only has trouble of finding that "undefined reference"...

[moorecm]

You can link with C object files or libraries, as long as you instruct the C++ compiler to supress its name mangling to look up those symbols. The means to do that is by declaring the symbols with extern "C". See the link again for an example.

[Woltan]

Great, I finally see what is going on. I just love C/C++ :), especially if things work from time to time^^

Thx again moorecm, that link you gave me by the way went straight into my bookmarks

Cherio Woltan