C – Ubuntu library distribution

I’m trying to port a program that uses GCD (Grand Central Dispatch) from OSX to Ubuntu 11.10. I installed libdispatch but I keep getting the following error:

 undefined reference to dispatch_main() 

Oddly enough, dispatch_main() is declared in the header file I included, and I call other functions declared in that header file, and the compiler can recognize them. Only dispatch_main() it doesn’t see, and if I call dispatch_main(2) it says too many arguments, so I know the compiler can see the header.

I tried separating the compile and linking steps (clang -c…) because it worked for the undefined reference error before, but it doesn’t seem to be doing anything here….

Does anyone have any suggestions? I’m confused about this….

Sounds like a library is missing in your link line. When compiling the program into an executable file, add the library to the command. I guess it should look like this :

clang x.c y.c z.c -ldispatch