On Tue, 12 Mar 2019 at 18:33, Branko <brane221122@xxxxxxxxx> wrote: > > I'd like to use my system gcc if possible to compile for such simple > micro ( no OS, no infrastructure, need barebone implementation). > > > I'm running Gentoo on x86_64, with gcc-8.3.0 Then your system compiler can only compile for x86_64 and x86. > > > So I cobbled up one three line example and within it just main functioin > that does nothing, except returns. > > > Then I tried "gcc -march=24kc main.c". > > > But compiler fails with unknown architecture, even though 24ks is listed > under MIPS. But your system compiler targets x86_64. A given build of GCC targets a single CPU architecture. Yours targets x86_64, not MIPS. > It outputs a list of suppported arches, and all of them are just within > x86/x86_64 world. No ARM, not Power, nothing else. > > > How should this be done ? > > > I don't think about going crosscompile as the compiler will run on my > host machine, while it's results would run on the micro... That's the definition of a cross compiler, and is what you need to do. You'll have to get a MIPS cross-compiler that runs on your host machine, or build one yourself.
