Em Wed, May 20, 2015 at 03:29:37PM +0200, Martin Liška escreveu: > On 05/20/2015 03:17 PM, Arnaldo Carvalho de Melo wrote: > >Em Wed, May 20, 2015 at 03:07:39PM +0200, Martin Liška escreveu: > >>Currently, GCC optimizes -O6 same as -O3 level. Right optimize debugging > >>experience is given by passing -Og to compiler.
> >Is this is this -Og available in old gcc versions? When was it > >introduced? Do you know? > GCC 4.8.0 is the first version capable of the option: > https://gcc.gnu.org/gcc-4.8/changes.html. > That can be problematic, which GCC version do you support in linux/perf? So the rule has been: What are the kernel requirements for the toolchain? tools/perf/ should build with that. Looking at the kernel's README, that is... ------------- COMPILING the kernel: - Make sure you have at least gcc 3.2 available. For more information, refer to Documentation/Changes. -------------- The oldest toolchain I personally test from time to time is: [acme@rhel5 ~]$ rpm -q gcc make binutils gcc-4.1.2-55.el5 make-3.81-3.el5 binutils-2.17.50.0.6-26.el5 [acme@rhel5 ~]$ - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
