linux-kernel - [PATCH] kbuild: add --hash-style= and --build-id unconditionally

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Message-Id: <20190713040110.18210-1-yamada.masahiro@socionext.com>
Date:   Sat, 13 Jul 2019 13:01:10 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        "David S. Miller" <davem@...emloft.net>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Russell King <linux@...linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        sparclinux@...r.kernel.org, x86@...nel.org
Subject: [PATCH] kbuild: add --hash-style= and --build-id unconditionally

As commit 1e0221374e30 ("mips: vdso: drop unnecessary cc-ldoption")
explained, these flags are supported by the minimal required version
of binutils.

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

 Makefile                          | 6 ++----
 arch/arm/vdso/Makefile            | 3 +--
 arch/arm64/kernel/vdso32/Makefile | 4 ++--
 arch/sparc/vdso/Makefile          | 3 +--
 arch/x86/entry/vdso/Makefile      | 5 ++---
 5 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/Makefile b/Makefile
index 2c5d00ba537e..969182105dbd 100644
--- a/Makefile
+++ b/Makefile
@@ -900,10 +900,8 @@ KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
 KBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
 KBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
 
-# Use --build-id when available.
-LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
-KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
-LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
+KBUILD_LDFLAGS_MODULE += --build-id
+LDFLAGS_vmlinux += --build-id
 
 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 LDFLAGS_vmlinux	+= $(call ld-option, -X,)
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index ca85df247775..87b7769214e0 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -13,8 +13,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING
 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
 	    -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
-	    $(call ld-option, --hash-style=sysv) \
-	    $(call ld-option, --build-id) \
+	    --hash-style=sysv --build-id \
 	    -T
 
 obj-$(CONFIG_VDSO) += vdso.o
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 288c14d30b45..60a4c6239712 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -96,8 +96,8 @@ VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
 VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
 VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
-VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--hash-style=sysv)
-VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--build-id)
+VDSO_LDFLAGS += -Wl,--hash-style=sysv
+VDSO_LDFLAGS += -Wl,--build-id
 VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
 
 
diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 5a9e4e1f9f81..324a23947585 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -115,8 +115,7 @@ quiet_cmd_vdso = VDSO    $@
 		       -T $(filter %.lds,$^) $(filter %.o,$^) && \
 		sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
 
-VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
-	$(call ld-option, --build-id) -Bsymbolic
+VDSO_LDFLAGS = -shared --hash-style=both --build-id -Bsymbolic
 GCOV_PROFILE := n
 
 #
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 39106111be86..4c234a18638a 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -179,9 +179,8 @@ quiet_cmd_vdso = VDSO    $@
 		       -T $(filter %.lds,$^) $(filter %.o,$^) && \
 		 sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
 
-VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
-	$(call ld-option, --build-id) $(call ld-option, --eh-frame-hdr) \
-	-Bsymbolic
+VDSO_LDFLAGS = -shared --hash-style=both --build-id \
+	$(call ld-option, --eh-frame-hdr) -Bsymbolic
 GCOV_PROFILE := n
 
 #
-- 
2.17.1