* [PATCH 2/4] init: use $(call cmd,) for generating include/generated/compile.h
2021-05-17 7:03 [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
@ 2021-05-17 7:03 ` Masahiro Yamada
2021-05-17 7:03 ` [PATCH 3/4] kbuild: sink stdout from cmd for silent build Masahiro Yamada
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Masahiro Yamada @ 2021-05-17 7:03 UTC (permalink / raw)
To: linux-kbuild; +Cc: Arnd Bergmann, Masahiro Yamada, Song Liu, linux-kernel
The 'cmd' macro shows the short log only when $(quiet) is quiet_.
Do not do it manually.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
init/Makefile | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/init/Makefile b/init/Makefile
index 6bc37f64b361..2846113677ee 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -27,11 +27,11 @@ $(obj)/version.o: include/generated/compile.h
# mkcompile_h will make sure to only update the
# actual file if its content has changed.
- chk_compile.h = :
- quiet_chk_compile.h = echo ' CHK $@'
-silent_chk_compile.h = :
-include/generated/compile.h: FORCE
- @$($(quiet)chk_compile.h)
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
+quiet_cmd_compile.h = CHK $@
+ cmd_compile.h = \
+ $(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" \
"$(CONFIG_PREEMPT_RT)" $(CONFIG_CC_VERSION_TEXT) "$(LD)"
+
+include/generated/compile.h: FORCE
+ $(call cmd,compile.h)
--
2.27.0
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH 3/4] kbuild: sink stdout from cmd for silent build
2021-05-17 7:03 [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
2021-05-17 7:03 ` [PATCH 2/4] init: use $(call cmd,) for generating include/generated/compile.h Masahiro Yamada
@ 2021-05-17 7:03 ` Masahiro Yamada
2021-05-17 7:03 ` [PATCH 4/4] kbuild: clean up ${quiet} checks in shell scripts Masahiro Yamada
2021-05-26 14:29 ` [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
3 siblings, 0 replies; 5+ messages in thread
From: Masahiro Yamada @ 2021-05-17 7:03 UTC (permalink / raw)
To: linux-kbuild; +Cc: Arnd Bergmann, Masahiro Yamada, Michal Marek, linux-kernel
When building with 'make -s', no output to stdout should be printed.
As Arnd Bergmann reported [1], mkimage shows the detailed information
of the generated images.
I think this should be done by the 'cmd' macro instead of by individual
scripts.
Insert 'exec >/dev/null;' in order to redirect stdout to /dev/null for
silent builds.
[Note about this implementation]
'exec >/dev/null;' may look somewhat tricky, but this has a reason.
At first, I tried this:
cmd = @set -e; $(echo-cmd) $(cmd_$(1)) >/dev/null
Appending '>/dev/null' is a commonly used way for redirection, but it
would not work if $(cmd_$(1)) itself contains a redirection.
For example, cmd_wrap in scripts/Makefile.asm-generic redirects the
output from the 'echo' command into the target file.
'$(cmd_$(1)) >/dev/null' would be expanded into:
echo "#include <asm-generic/$*.h>" > $@ >/dev/null
Then, the target file gets empty because the string will go to /dev/null
instead of $@.
Next, I tried this:
cmd = @set -e; $(echo-cmd) { $(cmd_$(1)); } >/dev/null
The form above would be expanded into:
{ echo "#include <asm-generic/$*.h>" > $@; } >/dev/null
This works as expected. However, it would be a syntax error if
$(cmd_$(1)) is empty.
When CONFIG_TRIM_UNUSED_KSYMS is disabled, $(call cmd,gen_ksymdeps) in
scripts/Makefile.build would be expanded into:
set -e; { ; } >/dev/null
..., which causes an syntax error.
The following does not work for the same reason.
cmd = @set -e; $(echo-cmd) ( $(cmd_$(1)) ) >/dev/null
So, finally I adopted:
cmd = @set -e; $(echo-cmd) exec >/dev/null; $(cmd_$(1))
[1]: https://lore.kernel.org/lkml/20210514135752.2910387-1-arnd@kernel.org/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
scripts/Kbuild.include | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 82dd1b65b7a8..f247e691562d 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -90,8 +90,13 @@ clean := -f $(srctree)/scripts/Makefile.clean obj
echo-cmd = $(if $($(quiet)cmd_$(1)),\
echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
+# sink stdout for 'make -s'
+ redirect :=
+ quiet_redirect :=
+silent_redirect := exec >/dev/null;
+
# printing commands
-cmd = @set -e; $(echo-cmd) $(cmd_$(1))
+cmd = @set -e; $(echo-cmd) $($(quiet)redirect) $(cmd_$(1))
###
# if_changed - execute command if any prerequisite is newer than
--
2.27.0
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH 4/4] kbuild: clean up ${quiet} checks in shell scripts
2021-05-17 7:03 [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
2021-05-17 7:03 ` [PATCH 2/4] init: use $(call cmd,) for generating include/generated/compile.h Masahiro Yamada
2021-05-17 7:03 ` [PATCH 3/4] kbuild: sink stdout from cmd for silent build Masahiro Yamada
@ 2021-05-17 7:03 ` Masahiro Yamada
2021-05-26 14:29 ` [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
3 siblings, 0 replies; 5+ messages in thread
From: Masahiro Yamada @ 2021-05-17 7:03 UTC (permalink / raw)
To: linux-kbuild
Cc: Arnd Bergmann, Masahiro Yamada, Alexey Dobriyan, Denis Efremov,
Michal Marek, linux-kernel
There were efforts to make 'make -s' really silent when it is a
warning-free build.
The conventional way was to let scripts check ${quiet}, and if it
is 'silent_', suppress the output by their own.
With the previous commit, the 'cmd' takes care of it now. The 'cmd' is
also invoked from if_changed, if_changed_dep, and if_changed_rule.
You can omit ${quiet} checks in shell scripts when they are invoked
from the 'cmd' macro.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
| 4 +---
scripts/link-vmlinux.sh | 4 +---
scripts/mkcompile_h | 4 +---
3 files changed, 3 insertions(+), 9 deletions(-)
--git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh
index 34a1dc2abc7d..1966a749e0d9 100755
--- a/kernel/gen_kheaders.sh
+++ b/kernel/gen_kheaders.sh
@@ -56,9 +56,7 @@ if [ -f kernel/kheaders.md5 ] &&
exit
fi
-if [ "${quiet}" != "silent_" ]; then
- echo " GEN $tarfile"
-fi
+echo " GEN $tarfile"
rm -rf $cpio_dir
mkdir $cpio_dir
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index f4de4c97015b..3b342b0b0b38 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -38,9 +38,7 @@ LDFLAGS_vmlinux="$3"
# Will be supressed by "make -s"
info()
{
- if [ "${quiet}" != "silent_" ]; then
- printf " %-7s %s\n" "${1}" "${2}"
- fi
+ printf " %-7s %s\n" "${1}" "${2}"
}
# Generate a linker script to ensure correct ordering of initcalls.
diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 4ae735039daf..06bbf4c2c66c 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -9,8 +9,6 @@ PREEMPT_RT=$5
CC_VERSION="$6"
LD=$7
-vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
-
# Do not expand names
set -f
@@ -82,7 +80,7 @@ if [ -r $TARGET ] && \
cmp -s .tmpver.1 .tmpver.2; then
rm -f .tmpcompile
else
- vecho " UPD $TARGET"
+ echo " UPD $TARGET"
mv -f .tmpcompile $TARGET
fi
rm -f .tmpver.1 .tmpver.2
--
2.27.0
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile
2021-05-17 7:03 [PATCH 1/4] kbuild: merge scripts/mkmakefile to top Makefile Masahiro Yamada
` (2 preceding siblings ...)
2021-05-17 7:03 ` [PATCH 4/4] kbuild: clean up ${quiet} checks in shell scripts Masahiro Yamada
@ 2021-05-26 14:29 ` Masahiro Yamada
3 siblings, 0 replies; 5+ messages in thread
From: Masahiro Yamada @ 2021-05-26 14:29 UTC (permalink / raw)
To: Linux Kbuild mailing list
Cc: Arnd Bergmann, Michal Marek, Linux Kernel Mailing List
On Mon, May 17, 2021 at 4:03 PM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> scripts/mkmakefile is simple enough to be merged in the Makefile.
>
> Use $(call cmd,...) to show the log instead of doing it in the
> shell script.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
Applied to linux-kbuild.
> Makefile | 15 ++++++++++++---
> scripts/mkmakefile | 17 -----------------
> 2 files changed, 12 insertions(+), 20 deletions(-)
> delete mode 100755 scripts/mkmakefile
>
> diff --git a/Makefile b/Makefile
> index 15b6476d0f89..50776cc3e894 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -544,14 +544,24 @@ scripts_basic:
> $(Q)rm -f .tmp_quiet_recordmcount
>
> PHONY += outputmakefile
> +ifdef building_out_of_srctree
> # Before starting out-of-tree build, make sure the source tree is clean.
> # outputmakefile generates a Makefile in the output directory, if using a
> # separate output directory. This allows convenient use of make in the
> # output directory.
> # At the same time when output Makefile generated, generate .gitignore to
> # ignore whole output directory
> -outputmakefile:
> -ifdef building_out_of_srctree
> +
> +quiet_cmd_makefile = GEN $@
> + cmd_makefile = { \
> + echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
> + echo "include $(srctree)/Makefile"; \
> + } > $@
> +
> +Makefile: FORCE
> + $(call cmd,makefile)
> +
> +outputmakefile: Makefile
> $(Q)if [ -f $(srctree)/.config -o \
> -d $(srctree)/include/config -o \
> -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
> @@ -562,7 +572,6 @@ ifdef building_out_of_srctree
> false; \
> fi
> $(Q)ln -fsn $(srctree) source
> - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
> $(Q)test -e .gitignore || \
> { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
> endif
> diff --git a/scripts/mkmakefile b/scripts/mkmakefile
> deleted file mode 100755
> index 1cb174751429..000000000000
> --- a/scripts/mkmakefile
> +++ /dev/null
> @@ -1,17 +0,0 @@
> -#!/bin/sh
> -# SPDX-License-Identifier: GPL-2.0
> -# Generates a small Makefile used in the root of the output
> -# directory, to allow make to be started from there.
> -# The Makefile also allow for more convinient build of external modules
> -
> -# Usage
> -# $1 - Kernel src directory
> -
> -if [ "${quiet}" != "silent_" ]; then
> - echo " GEN Makefile"
> -fi
> -
> -cat << EOF > Makefile
> -# Automatically generated by $0: don't edit
> -include $1/Makefile
> -EOF
> --
> 2.27.0
>
--
Best Regards
Masahiro Yamada
^ permalink raw reply [flat|nested] 5+ messages in thread