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From: vallor <vallor@cultnix.org>
Newsgroups: comp.os.linux.advocacy
Subject: Re: Fine. (was: Re: C Non-Programming Non-Challenge)
Date: 18 Jun 2024 21:55:47 GMT
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On Mon, 17 Jun 2024 22:44:05 +0000, Farley Flud <ff@linux.rocks> wrote in
<17d9ec069a174a11$93819$3210899$802601b3@news.usenetexpress.com>:

> On 17 Jun 2024 22:14:24 GMT, vallor wrote:
> 
> 
>> What I would like to do is someday figure out how to build with
>> -march=native .  Haven't bothered yet, because my machine is already
>> plenty fast.
>> 
>> 
> I don't think that it is possible to pass custom CFLAGS to the kernel
> build.

Whatever, Sport.

$ rcsdiff -u Makefile
===================================================================
RCS file: RCS/Makefile,v
retrieving revision 1.1
diff -u -r1.1 Makefile
--- Makefile	2024/06/16 11:51:16	1.1
+++ Makefile	2024/06/17 23:36:50
@@ -808,7 +808,7 @@
 KBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O3 -march=native
 KBUILD_RUSTFLAGS += -Copt-level=2
 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS += -Os

-- 
-v System76 Thelio Mega v1.1 x86_64 NVIDIA RTX 3090 Ti
   OS: Linux 6.9.5tweaked Release: Mint 21.3 Mem: 258G
   "Hors d'oeuvres--a ham sandwich cut into forty pieces."