On 10/14/14 at 05:52pm, Vivek Goyal wrote: > On Tue, Oct 14, 2014 at 12:46:58PM +0800, WANG Chao wrote: > > Supress this unnecessary message during kernel re-build > > (CONFIG_KEXEC_FILE=y): > > > > make[1]: `arch/x86/purgatory/kexec-purgatory.c' is up to date. > > > > Signed-off-by: WANG Chao <chaow...@redhat.com> > > --- > > arch/x86/purgatory/Makefile | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile > > index f52e033..2c835e3 100644 > > --- a/arch/x86/purgatory/Makefile > > +++ b/arch/x86/purgatory/Makefile > > @@ -24,6 +24,7 @@ quiet_cmd_bin2c = BIN2C $@ > > > > $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE > > $(call if_changed,bin2c) > > + @: > > Where can I find the description of "@:" and how does it work?
@ is used to suppress echo'ing. See: https://www.gnu.org/software/make/manual/html_node/Echoing.html This is a trick to avoid "... is up to date" message". Check out commit a9358bc ("x86/build: Supress realmode.bin is up to date message"). Thanks WANG Chao -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
