Date: Thu, 1 Nov 2007 08:19:49 +0100 From: "Stephan F. Yaraghchi" <stephan@yaraghchi.org> To: freebsd-current@freebsd.org, stephan@yaraghchi.org Subject: Re: loader breaks with -O2 optimizations Message-ID: <25f52a3d0711010019v76aef126q6ccae27682f14568@mail.gmail.com> In-Reply-To: <200710311452.l9VEq33u040716@lurza.secnetix.de> References: <25f52a3d0710300732x425f0c45vde1a29361096c018@mail.gmail.com> <200710311452.l9VEq33u040716@lurza.secnetix.de>
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On 10/31/07, Oliver Fromme <olli@lurza.secnetix.de> wrote: > Stephan F. Yaraghchi wrote: > > After making world on a freshly installed 7.0-BETA1 > > the system does not boot anymore due to a broken loader: > > [...] > > I found out that the following line in my make.conf causes > > the problem: > > > > CFLAGS=3D -O2 -funroll-loops -pipe > > > > After changing down to -O1 and making /usr/src/sys/boot again > > the systems behaves properly at boot. > > Have you tried with the default flags? i.e. simply remove > the CFLAGS line from your make.conf. Does the loader still > break? > > Best regards > Oliver > > PS: The default flags are: -O2 -fno-strict-aliasing -pipe > (see /usr/share/mk/sys.mk) > > -- > Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. > Handelsregister: Registergericht Muenchen, HRA 74606, Gesch=E4ftsfuehrun= g: > secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht M=FC= n- > chen, HRB 125758, Gesch=E4ftsf=FChrer: Maik Bachmann, Olaf Erb, Ralf Geb= hart > > FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd > > "Unix gives you just enough rope to hang yourself -- > and then a couple of more feet, just to be sure." > -- Eric Allman > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " > Hi Oliver, I added -O2 -fno-strict-aliasing -pipe to the make.conf and it worked too! Jeremy came up with a post by Josh that points out that the size of the binary seems to be the problem: http://www.nabble.com/buildworld-failure-(boot2.ld-too-big-when-CFLAGS-set-= in-make.conf)-t4674137.html Using the default CFLAGS the resulting loader binary is 290816 Bytes, with -O1 -funroll-loops -pipe it's 319488 Bytes and after adding -funroll-loops to the defaults the binary becames 323584 Bytes... --=20 Stephan www.deine-stimme-gegen-armut.de
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