Running on OS X 10.5.8 Really new to this, going through a tutorial and learning how to compile a program in unix. when i put the: % ./configure --prefix=$HOME/units174 command , I get the following error message: loading cache ./config.cache checking for gcc... gcc checking whether the C compiler (gcc ) works... no configure: error: installation or configuration problem: C compiler cannot create executable Im assuming i have no gcc installed, so.... I look up in forums and i read i need xcode installed, in order to have gcc and it should already be on my system somewhere..? so i went on mac developer tools and the xcode download wont install on 10.5.8, it says i need 10.6 so lost on this..any help would be really appreciated. where can i find xcode on my system?