From: xur@google.com
To: Masahiro Yamada <masahiroy@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nicolas.schier@linux.dev>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Miguel Ojeda <ojeda@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Alice Ryhl <aliceryhl@google.com>,
Sami Tolvanen <samitolvanen@google.com>,
"Mike Rapoport (Microsoft)" <rppt@kernel.org>,
Rafael Aquini <aquini@redhat.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Stafford Horne <shorne@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Piotr Gorski <piotrgorski@cachyos.org>, Rong Xu <xur@google.com>,
Venkat Rao Bagalkote <venkat88@linux.ibm.com>,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Teresa Johnson <tejohnson@google.com>
Cc: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
llvm@lists.linux.dev
Subject: [PATCH v7 2/3] kbuild: change --thin back to 'T' in $(AR)
Date: Sat, 28 Mar 2026 01:19:26 +0000 [thread overview]
Message-ID: <20260328011927.3569802-3-xur@google.com> (raw)
In-Reply-To: <20260328011927.3569802-1-xur@google.com>
From: Rong Xu <xur@google.com>
The '-T' flag in $(AR) is no longer problematic since the minimum
requirement for LLVM has been updated to version 15. As of LLVM 14
and onward, the '-T' flag functions identically to the '--thin' flag.
Fixed the issue seen on IBM Power11 System:
ar: unrecognized option '--thin'
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Closes: https://lore.kernel.org/linux-next/476507c9-a371-4864-9e87-572c1ecae82d@linux.ibm.com/
Signed-off-by: Rong Xu <xur@google.com>
---
scripts/Makefile.vmlinux_a | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/scripts/Makefile.vmlinux_a b/scripts/Makefile.vmlinux_a
index 9774f02b43b2..650d44330d1f 100644
--- a/scripts/Makefile.vmlinux_a
+++ b/scripts/Makefile.vmlinux_a
@@ -10,12 +10,12 @@ include $(srctree)/scripts/Makefile.lib
# Link of built-in-fixup.a
# ---------------------------------------------------------------------------
-# '$(AR) mPi' needs --thin to workaround the bug of llvm-ar <= 14
+# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
quiet_cmd_ar_builtin_fixup = AR $@
cmd_ar_builtin_fixup = \
rm -f $@; \
- $(AR) cDPrS --thin $@ $(KBUILD_VMLINUX_OBJS); \
- $(AR) mPi --thin $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
+ $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
+ $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
targets += built-in-fixup.a
built-in-fixup.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
--
2.53.0.1018.g2bb0e51243-goog
next prev parent reply other threads:[~2026-03-28 1:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-28 1:19 [PATCH v7 0/3] kbuild: distributed build support for Clang ThinLTO xur
2026-03-28 1:19 ` [PATCH v7 1/3] kbuild: move vmlinux.a build rule to scripts/Makefile.vmlinux_a xur
2026-03-28 1:19 ` xur [this message]
2026-03-28 1:19 ` [PATCH v7 3/3] kbuild: distributed build support for Clang ThinLTO xur
2026-03-29 20:05 ` Nicolas Schier
2026-03-30 10:01 ` Nathan Chancellor
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