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[209.85.128.173]) by smtp.gmail.com with ESMTPSA id 3f1490d57ef6-e0b2960b4f6sm1519360276.0.2024.07.28.10.57.24 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 28 Jul 2024 10:57:25 -0700 (PDT) Received: by mail-yw1-f173.google.com with SMTP id 00721157ae682-65fe1239f12so8589927b3.0 for ; Sun, 28 Jul 2024 10:57:24 -0700 (PDT) X-Forwarded-Encrypted: i=1; AJvYcCXVGYFJVDi1y+DGJ5j4RczTlPxZEtaPQYtshRdig4wBVMcHw1EUGFCwyn/1zUfATiX2gtxsmz8aOoQsaXrmKYTAYQM= X-Received: by 2002:a05:690c:a85:b0:648:857c:1530 with SMTP id 00721157ae682-67a0919aebcmr45656887b3.34.1722189444496; Sun, 28 Jul 2024 10:57:24 -0700 (PDT) MIME-Version: 1.0 References: <23bdb6fc8d884ceebeb6e8b8653b8cfe@AcuMS.aculab.com> <902a9bf3-9404-44e8-9063-03da3168146a@lucifer.local> <137646a7-7017-490d-be78-5bd5627609c3@lucifer.local> In-Reply-To: <137646a7-7017-490d-be78-5bd5627609c3@lucifer.local> From: Geert Uytterhoeven Date: Sun, 28 Jul 2024 19:57:11 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 0/7] minmax: reduce compilation time To: Lorenzo Stoakes Cc: Linus Torvalds , David Laight , "linux-kernel@vger.kernel.org" , "Matthew Wilcox (Oracle)" , Christoph Hellwig , Andrew Morton , Andy Shevchenko , Dan Carpenter , Arnd Bergmann , "Jason@zx2c4.com" , "pedro.falcato@gmail.com" , Mateusz Guzik , "linux-mm@kvack.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: DE600100008 X-Stat-Signature: u7n5opbusdyeer7d9a8ysoway4ec4td9 X-Rspam-User: X-HE-Tag: 1722189449-310300 X-HE-Meta: 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 RfWuG0Tw 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Lorenzo, On Fri, Jul 26, 2024 at 8:57=E2=80=AFPM Lorenzo Stoakes wrote: > On Fri, Jul 26, 2024 at 11:24:09AM GMT, Linus Torvalds wrote: > > On Fri, 26 Jul 2024 at 11:13, Lorenzo Stoakes > > wrote: > > > > > > 5,447,539 ./arch/x86/xen/setup.o.pre > > > > Can you perhaps do some kind of "max expansion" on all the > > preprocessor files (you seem to have done it by changing the ".c.o" > > rule to just spit it out as "o.pre", which sounds fine). > > Yeah I simply hacked in a gcc -E, ugly but effective, e.g. prepending > cmd_cc_o_c in scripts/Makefile.build with: > > cmd_cc_o_c =3D $(CC) $(c_flags) -E $< > $@.pre; \ Kbuild already knows how to build a preprocessed file (.i), so making any .o depend on its .i should work, too? Or am I missing something? Gr{oetje,eeting}s, Geert --=20 Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k= .org In personal conversations with technical people, I call myself a hacker. Bu= t when I'm talking to journalists I just say "programmer" or something like t= hat. -- Linus Torvalds