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Messages in this thread Patch in this message |
On Fri, May 05, 2006 at 02:30:05AM -0400, Dan Merillat wrote: > On 5/5/06, Sam Ravnborg <sam@ravnborg.org> wrote: > >kbuild checks for any differences in the commandline alos - so a rebuild > >happens if you change options to gcc (think -O2 => -Os). > >If you experience that for example mm/slab.c is rebuild then try to > >do the following: > >cp mm/.slab.o.cmd foo > >make mm/ > >diff -u foo mm/.slab.o.cmd > > > >If diff detects any difference then you know why and need to find out > >why there is a difference. > > Nothing, even md5sums match. > 2abfcbee132335ba8e1da120569abf67 .do_mounts.o.cmd > 2abfcbee132335ba8e1da120569abf67 .do_mounts.o.cmd.1 > > but it gets rebuilt every time. So we need to dive a bit deeper to understand why everything gets rebuild. Try following patch: diff --git a/scripts/Makefile.build b/scripts/Makefile.build index e48e60d..4c52131 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -189,6 +189,9 @@ endef # Built-in and composite module parts %.o: %.c FORCE + @echo $@ + @echo chg=$? + @echo arg-check=$(call arg-check, $(cmd_cc_o_c), $(cmd_$@)) $(call cmd,force_checksrc) $(call if_changed_rule,cc_o_c) This will not fix anything - but will give us a hint why things gets rebuild. After applying the patch try: make init/do_mounts.o And then post the output. Also include the .do_mounts.o.cmd file Sam - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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