Hi.
On Mon, Nov 7, 2022 at 12:48 AM Kaz Kylheku <k...@kylheku.com> wrote: > > On 2022-11-06 02:28, Masahiro Yamada wrote: > > Is there a solution to suppress this 'up to date' log? > > Hi, Masahiro, > > Use make -s. That option also suppresses the printing of > the recipe commands that are being executed. However, that > is not a problem for a makefile which already hides them > with the @ character, and performs its own customized printing. The -s option hides everything, so it is not a solution. See the test case in my previous email. "make baz bar" _did_ update bar. Why does Make pretend like "'bar' had already been up-to-date before the command invocation" ? Make is giving *invalid* information. Do you see my point? > > 0:[1106:073304]:sun-go:~/txr$ make all > make: Nothing to be done for 'all'. > 0:[1106:073306]:sun-go:~/txr$ make -s > 0:[1106:073307]:sun-go:~/txr$ touch eval.c stdlib/optimize.tl > 0:[1106:073318]:sun-go:~/txr$ make -s > CC eval.c -> opt/eval.o > LINK opt/txr.o [.. SNIP ...] opt/gzio.o -> txr > TXR stdlib/optimize.tl -> stdlib/optimize.tlo > 0:[1106:073325]:sun-go:~/txr$ make -s > 0:[1106:073327]:sun-go:~/txr$ > > Unfortunately, I see that the kernel Makefile is too clever; > when you run make -s, it obeys that and suppresses its > custom output like: > > CC init/version.o > LD init/built-in.o > LD vmlinux.o > > Maybe there is a way to opt-in to that output in spite of > make -s? No, that is not an option. With -s option, Kbuild deliberately suppresses everything except error/warning messages. Some people (especially those who work in continuous integration) think it is very useful; if "make -s" outputs zero log, the kernel build succeeded without any warning. Linus is very picky about any build warning. > > (I work in embedded, so I'm not on the latest kernel; > I'm doing everything here with 4.9.) > > I see that in tools/build/Makefile.build, it is checking > for -s being in MAKEFLAGS and manipulating the quiet > variable. This works for me: > > make -s quiet=quiet_ "quiet" is used as an internal variable. Not intended for a tweak from the command line. > > The check for -s in MAKEFLAGS is done in a way that > the user's V variable is ignored. At a glance, I don't > see any deliberate interface for overriding that; so > I resorted to overriding the quiet variable with the > correct internal value to get the default abbreviated > comand printing mode. As I said, this is an intended behavior. Kbuild takes -s precedence over V= option because -s is a strong demand "Please suppress logs except error/warning". > Cheers ... > > > -- Best Regards Masahiro Yamada
