linux-kernel - [PATCH] Replace use of perl with sed and tr in s390x build.

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Date:   Mon, 17 May 2021 23:46:44 -0500
From:   Rob Landley <rob@...dley.net>
To:     Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Alexander Egorenkov <egorenar@...ux.ibm.com>,
        Philipp Rudo <prudo@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] Replace use of perl with sed and tr in s390x build.

From: Rob Landley <rob@...dley.net>

Commit 246218962e21 in November added a perl dependency to the s390x vmlinux
build, complicating the "countering trusting trust" build approach ala
http://lists.landley.net/pipermail/toybox-landley.net/2020-July/011898.html

Signed-off-by: Rob Landley <rob@...dley.net>
---

 arch/s390/boot/compressed/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index de18dab518bb..e941b165bd4f 100644
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -33,7 +33,7 @@ $(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OB
 
 quiet_cmd_dumpsyms = DUMPSYMS $<
 define cmd_dumpsyms
-	$(NM) -n -S --format=bsd "$<" | $(PERL) -ne '/(\w+)\s+(\w+)\s+[tT]\s+(\w+)/ and printf "%x %x %s\0",hex $$1,hex $$2,$$3' > "$@"
+	$(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
 endef
 
 $(obj)/syms.bin: $(obj)/vmlinux.syms FORCE