linux-kernel - [PATCH 1/3] kbuild: use $(basename ...) for cmd_asn1

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Date:   Sun, 21 Jul 2019 01:27:38 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] kbuild: use $(basename ...) for cmd_asn1_compiler

$(basename ...) trims the last suffix. Using it is more intuitive in
my opinion.

This pattern rule makes %.asn1.c and %.asn1.h at the same time.
Previously, the short log showed only either of them, depending on
the target file in question.

To clarify that two files are being generated by the single recipe,
I changed the log as follows:

Before:

  ASN.1   crypto/asymmetric_keys/x509.asn1.c

After:

  ASN.1   crypto/asymmetric_keys/x509.asn1.[ch]

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

 scripts/Makefile.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 644431140434..7f71dbd180cb 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -388,9 +388,9 @@ $(obj)/%.lds: $(src)/%.lds.S FORCE
 
 # ASN.1 grammar
 # ---------------------------------------------------------------------------
-quiet_cmd_asn1_compiler = ASN.1   $@
+quiet_cmd_asn1_compiler = ASN.1   $(basename $@).[ch]
       cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
-				$(subst .h,.c,$@) $(subst .c,.h,$@)
+				$(basename $@).c $(basename $@).h
 
 $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
 	$(call cmd,asn1_compiler)
-- 
2.17.1