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Subject[PATCH] kbuild: process mixture of clean/build targets one by one
Date
I sometimes receive a question why "make -j<N> clean all" does not
work. It is actually possible to make it work by handling targets
one by one.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

Makefile | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index cd9145c..31d138e 100644
--- a/Makefile
+++ b/Makefile
@@ -220,7 +220,8 @@ export srctree objtree VPATH
version_h := include/generated/uapi/linux/version.h
old_version_h := include/linux/version.h

-no-dot-config-targets := clean mrproper distclean \
+clean-targets := %clean mrproper cleandocs
+no-dot-config-targets := $(clean-targets) \
cscope gtags TAGS tags help% %docs check% coccicheck \
$(version_h) headers_% archheaders archscripts \
kernelversion %src-pkg
@@ -243,6 +244,14 @@ ifeq ($(KBUILD_EXTMOD),)
endif
endif
endif
+
+# For "make -j clean all", "make -j mrproper defconfig all", etc.
+ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
+ ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
+ mixed-targets := 1
+ endif
+endif
+
# install and modules_install need also be processed one by one
ifneq ($(filter install,$(MAKECMDGOALS)),)
ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
--
2.7.4
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