This allows to detect -s (--silent) option without checking GNU Make
version.
As commit e36aaea28972 ("kbuild: Fix silent builds with make-4")
pointed out, GNU Make 4.x changed the way/order it presents the
command line options into MAKEFLAGS.
In Make 3.8x, 's' is always be the first in a group of short options.
The group could be prefixed with '-'.
In Make 4.x, 's' is always the last in a group of short options.
As commit e6ac89fabd03 ("kbuild: Correctly deal with make options
which contain an 's'") addressed, we also need to deal with long
options that end with 's', like --warn-undefined-variables.
Test cases:
[1] command line input: make --silent
-> MAKEFLAGS for Make 3.8x: s
-> MAKEFLAGS for Make 4.x : s
[2] command line input: make -srR
-> MAKEFLAGS for Make 3.8x: sRr
-> MAKEFLAGS for Make 4.x : rRs
[3] command line input: make -s -rR --warn-undefined-variables
-> MAKEFLAGS for Make 3.8x: --warn-undefined-variables -sRr
-> MAKEFLAGS for Make 4.x : rRs --warn-undefined-variables
We can take care of them, by filtering out long options (--%),
then matching -s% s% %s patterns.
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---
Changes in v2:
- Fix makefiles under tools as well
Makefile | 9 +--------
tools/build/Makefile.build | 8 +-------
tools/scripts/Makefile.include | 8 +-------
3 files changed, 3 insertions(+), 22 deletions(-)
diff --git a/Makefile b/Makefile
index b1ee4a49efa2..d8b5c4230da0 100644
--- a/Makefile
+++ b/Makefile
@@ -84,17 +84,10 @@ endif
# If the user is running make -s (silent mode), suppress echoing of
# commands
-ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
-ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
+ifneq ($(filter -s% s% %s,$(filter-out --%,$(MAKEFLAGS))),)
quiet=silent_
tools_silent=s
endif
-else # make-3.8x
-ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
- quiet=silent_
- tools_silent=-s
-endif
-endif
export quiet Q KBUILD_VERBOSE
diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
index e279a71c650d..850fe9ce47d3 100644
--- a/tools/build/Makefile.build
+++ b/tools/build/Makefile.build
@@ -19,15 +19,9 @@ else
Q=@
endif
-ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
-ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
+ifneq ($(filter -s% s% %s,$(filter-out --%,$(MAKEFLAGS))),)
quiet=silent_
endif
-else # make-3.8x
-ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
- quiet=silent_
-endif
-endif
build-dir := $(srctree)/tools/build
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index fc74db62fef4..7fda39adf3cc 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -58,15 +58,9 @@ else
NO_SUBDIR = :
endif
-ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
-ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
+ifneq ($(filter -s% s% %s,$(filter-out --%,$(MAKEFLAGS))),)
silent=1
endif
-else # make-3.8x
-ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
- silent=1
-endif
-endif
#
# Define a callable command for descending to a new directory
--
2.7.4
--
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