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authorMasahiro Yamada <masahiroy@kernel.org>2020-05-11 12:50:13 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-05-26 00:03:16 +0900
commit121c2a137767df5f9f301795e7d3757d1af04b21 (patch)
treea50e6a717fe79f686369c0fe861007ee1693efda /Makefile
parent93fdddfefc831981c8cffc3db90275e9b1d8a0e5 (diff)
downloadlwn-121c2a137767df5f9f301795e7d3757d1af04b21.tar.gz
lwn-121c2a137767df5f9f301795e7d3757d1af04b21.zip
kbuild: error out if targets prefixed with '__' are directly run
Some targets are internal-use only. It is tedious to care about "what if __build_one_by_one is contained in $(MAKECMDGOALS)?" etc. Prefix internal targets with double underscores. Stop parsing Makefile if they are directly run. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile23
1 files changed, 13 insertions, 10 deletions
diff --git a/Makefile b/Makefile
index fcf31edc7522..1915630cc24b 100644
--- a/Makefile
+++ b/Makefile
@@ -11,9 +11,12 @@ NAME = Kleptomaniac Octopus
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
+$(if $(filter __%, $(MAKECMDGOALS)), \
+ $(error targets prefixed with '__' are only for internal use))
+
# That's our default target when none is given on the command line
-PHONY := _all
-_all:
+PHONY := __all
+__all:
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
@@ -172,13 +175,13 @@ export sub_make_done := 1
ifeq ($(need-sub-make),1)
-PHONY += $(MAKECMDGOALS) sub-make
+PHONY += $(MAKECMDGOALS) __sub-make
-$(filter-out _all sub-make $(this-makefile), $(MAKECMDGOALS)) _all: sub-make
+$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
@:
# Invoke a second make in the output directory, passing relevant variables
-sub-make:
+__sub-make:
$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
endif # need-sub-make
@@ -323,7 +326,7 @@ ifdef mixed-build
PHONY += $(MAKECMDGOALS) __build_one_by_one
-$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
+$(MAKECMDGOALS): __build_one_by_one
@:
__build_one_by_one:
@@ -598,12 +601,12 @@ else #!config-build
# targets and others. In general all targets except *config targets.
# If building an external module we do not care about the all: rule
-# but instead _all depend on modules
+# but instead __all depend on modules
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
-_all: all
+__all: all
else
-_all: modules
+__all: modules
endif
# Decide whether to build built-in, modular, or both.
@@ -625,7 +628,7 @@ endif
# in addition to whatever we do anyway.
# Just "make" or "make all" shall build modules as well
-ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
+ifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),)
KBUILD_MODULES := 1
endif