On 08/11/2014 10:40 AM, Shaun Ruffell wrote: > FYI, it looks like the following patch (committed in > 8fc5b4d4121c95482b2583) adds a new requirement to use at least gcc > 4.4 to build the kernel? Well, to build the kernel with that particular new functionality enabled, yes. However... > The above "-mcmodel=large" compiler flag produces the following output on GCC 4.1.2. > > $ make modules_prepare ; gcc --version > CHK include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CC arch/x86/purgatory/purgatory.o > arch/x86/purgatory/purgatory.c:1: sorry, unimplemented: code model ?large? not supported yet > make[1]: *** [arch/x86/purgatory/purgatory.o] Error 1 > make: *** [archprepare] Error 2 > gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-54) > Copyright (C) 2006 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > > I did a quick search for a discussion the indicates this compiler is now > officially too old to build the kernel but did not find one. > > If this is required, maybe Documentation/Changes needs to be updated > with the new minimum required version? ... I'm having a very, very hard time to picture a reason why the "large" model would be necessary or even desirable for the purgatory code. The "small PIC" model seem to fit much better... -hpa
