[07/15] kbuild: build all prerequisite of headers_install simultaneously
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Message ID 20190604101409.2078-8-yamada.masahiro@socionext.com
State New
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Series
  • kbuild: refactor headers_install and support compile-test of UAPI headers
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Commit Message

Masahiro Yamada June 4, 2019, 10:14 a.m. UTC
Currently, scripts/unifdef is compiled after scripts_basic,
uapi-asm-generic, archheaders, and archscripts.

The proper dependency is just scripts_basic. There is no problem
to compile scripts/unifdef and other headers at the same time.

Split scripts_unifdef out in order to allow more parallel building.

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

 Makefile | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Patch
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diff --git a/Makefile b/Makefile
index e998c40c94b4..f9c206eb3583 100644
--- a/Makefile
+++ b/Makefile
@@ -1181,8 +1181,7 @@  export INSTALL_HDR_PATH = $(objtree)/usr
 PHONY += archheaders archscripts
 
 PHONY += __headers
-__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
-	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
+__headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
 
 PHONY += headers_install
 headers_install: __headers
@@ -1204,6 +1203,10 @@  ifdef CONFIG_HEADERS_CHECK
 all: headers_check
 endif
 
+PHONY += scripts_unifdef
+scripts_unifdef: scripts_basic
+	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
+
 # ---------------------------------------------------------------------------
 # Kernel selftest