On Tuesday 24 May 2005 04:57, Dinesh Ahuja wrote: > > Try cleaning the tree with mrproper (save your > > .config first) and using > > make linux ARCH=um > > (and make modules ARCH=um if you use modules) > > for the build.
> I have cleaned tree using make mrproper ARCH=um > command. > And after that i created .config file by using make > xconfig ARCH=um command. > Some sites suggested to modify Makefile before > building UML, so I did that. Don't know the reasons to do this, maybe they've been valid in the past. > I have commneted out in my makefile > #ifndef CONFIG_FRAME_POINTER > #CFLAGS += -fomit-frame-pointer > #endif Hmm, doing this won't hurt stability, maybe a tiny bit of performance. > And removed -O2 option from following > HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 > -fomit-frame-pointer > HOSTCXXFLAGS = -O2 Well, removing -O2 from HOSTCFLAGS is probably meaningless, I guess they referred to CFLAGS, however this is not needed (except on some very particular configurations; for that cases, later UML releases already have the fix). > Is it possible to have UML kernel [ guest kernel ] of > higher version than the host kernel. Yes, definitely... > In my case, as > suggested by you, I am planning to have kernel 2.6.10 > [ which has UML build in it] as guest kernel and host > kernel as 2.4.20. As 2.6.10 already had UML built-in, > this will keep me away from patch work. Let me recommend 2.6.11 if possible... 2.6.10 was not a nice UML release. > Please tell me whether the steps to build UML kernel > from an unpatched kernel are same or any difference. They're basically the same... only differences in 2.6: 1) to get a sane "default" configuration, use make defconfig ARCH=um... make *config ARCH=um may pick as default the host config, which would be sensible except that we are actually cross-compiling. 2) there's one release where "make linux ARCH=um" does not work, if you hit that use "make vmlinux ARCH=um" and take vmlinux as the executable. -- Paolo Giarrusso, aka Blaisorblade Skype user "PaoloGiarrusso" Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
