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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
To:     linux-kbuild@vger.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@socionext.com>,
        Michal Marek <michal.lkml@markovi.net>,
        linux-kernel@vger.kernel.org
Subject: [PATCH] kbuild: consolidate single targets
Date:   Tue, 30 Oct 2018 13:32:45 +0900
Message-Id: <1540873965-31342-1-git-send-email-yamada.masahiro@socionext.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Instead of specifying target/source pairs, let's list patterns that we
want to handle as single targets. This slightly changes the behavior;
the top Makefile previously checked the presence of a source file,
now Kbuild will descend into a subdirectory anyway to find out what to
do there.

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

 Makefile | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/Makefile b/Makefile
index be76e6e..7d13add 100644
--- a/Makefile
+++ b/Makefile
@@ -1713,21 +1713,7 @@ else
         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
 endif
 
-%.s: %.c prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.i: %.c prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.o: %.c prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.lst: %.c prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.s: %.S prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.o: %.S prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.symtypes: %.c prepare scripts FORCE
-	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
-%.ll: %.c prepare scripts FORCE
+%.i %.ll %.lst %.o %.s %.symtypes: prepare scripts FORCE
 	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
 
 # Modules
-- 
2.7.4