On 19 January 2011 01:13, Carles Setó wrote: > Dear GNU managers, Please don't cross-post like this - your question is suitable to the gcc-help mailing list, not the other addresses you used. Please keep any follow up to the gcc-help list, thanks. > I have installed gcc-4.5.0. on my PC and I want to compile to practise Objective-C language. One of my purposes is training to become a Apple developer. > > What file I should download, (unzip), objc or objcp?, what's the difference between these two ones? I'm not sure what files you mean, but I believe objcp is for Objective-C++. You might be able to find pre-built GCC packages to install, depending which OS you're running. That is a lot easier than building GCC yourself. See http://gcc.gnu.org/install/binaries.html