[PATCH 4/5] kbuild: allow to combine multiple V= levels

Masahiro Yamada
2022-12-22T16:26:02Z

Commit a6de553da01c ("kbuild: Allow to combine multiple W= levels")
supported W=123 to enable all the extra warning groups.

I think a similar idea is applicable to the V= option.

V=1 echos the whole command
V=2 prints the reason for rebuilding

These are orthogonal, and can be enabled at the same time.

This commit supports V=12 to enable both of them.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

Makefile | 18 +++++++++---------
arch/x86/tools/Makefile | 2 +-
scripts/Kbuild.include | 4 ++--
scripts/tags.sh | 2 +-
4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/Makefile b/Makefile
index ce98dfd8359a..bd69bf73a256 100644
--- a/Makefile
+++ b/Makefile
@@ -69,9 +69,8 @@ unexport GREP_OPTIONS
#
# $(Q)$(MAKE) $(build)=scripts/basic
#
-# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
-# If KBUILD_VERBOSE equals 1 then the above command is displayed.
-# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
+# If KBUILD_VERBOSE contains 1, the whole command is echoed.
+# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
#
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
@@ -83,12 +82,12 @@ ifndef KBUILD_VERBOSE
KBUILD_VERBOSE = 0
endif

-ifeq ($(KBUILD_VERBOSE),1)
+quiet = quiet_
+Q = @
+
+ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
quiet =
Q =
-else
- quiet=quiet_
- Q = @
endif

# If the user is running make -s (silent mode), suppress echoing of
@@ -1762,8 +1761,9 @@ help:
printf " %-16s - Show all of the above\\n" help-boards; \
echo '')

- @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
- @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
+ @echo ' make V=n [targets] 0: quiet build (default), 1: verbose build'
+ @echo ' 2: give reason for rebuild of target'
+ @echo ' V=1 and V=2 can be combined with V=12'
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
@echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
@echo ' (sparse by default)'
diff --git a/arch/x86/tools/Makefile b/arch/x86/tools/Makefile
index bddfc9a46645..90e820ac9771 100644
--- a/arch/x86/tools/Makefile
+++ b/arch/x86/tools/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
PHONY += posttest

-ifeq ($(KBUILD_VERBOSE),1)
+ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
posttest_verbose = -v
else
posttest_verbose =
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index faae3c7986b0..10cf8d2d82ef 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -132,7 +132,7 @@ clean := -f $(srctree)/scripts/Makefile.clean obj
# If quiet is empty, print short log and whole command
silent_log_print = exec >/dev/null;
quiet_log_print = $(if $(quiet_cmd_$1), echo ' $(call escsq,$(quiet_cmd_$1)$(why))';)
- log_print = echo '$(pound) $(call escsq,$(or $(quiet_cmd_$1),cmd_$1 $@))'; \
+ log_print = echo '$(pound) $(call escsq,$(or $(quiet_cmd_$1),cmd_$1 $@)$(why))'; \
echo ' $(call escsq,$(cmd_$1))';

# Delete the target on interruption
@@ -233,7 +233,7 @@ if_changed_rule = $(if $(if-changed-cond),$(rule_$(1)),@:)
# (5) No dir/.target.cmd file (used to store command line)
# (6) No dir/.target.cmd file and target not listed in $(targets)
# This is a good hint that there is a bug in the kbuild file
-ifeq ($(KBUILD_VERBOSE),2)
+ifneq ($(findstring 2, $(KBUILD_VERBOSE)),)
_why = \
$(if $(filter $@, $(PHONY)),- due to target is PHONY, \
$(if $(wildcard $@), \
diff --git a/scripts/tags.sh b/scripts/tags.sh
index e137cf15aae9..2e756bee1fa9 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -8,7 +8,7 @@
# Uses the following environment variables:
# SUBARCH, SRCARCH, srctree

-if [ "$KBUILD_VERBOSE" = "1" ]; then
+if [[ "$KBUILD_VERBOSE" =~ 1 ]]; then
set -x
fi

--
2.34.1