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From: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
To: Nathan Chancellor <nathan@kernel.org>,
	 Nicolas Schier <nicolas.schier@linux.dev>,
	Nicolas Schier <nsc@kernel.org>,  Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>,
	 Heiko Carstens <hca@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	 Alexander Gordeev <agordeev@linux.ibm.com>,
	 Christian Borntraeger <borntraeger@linux.ibm.com>,
	 Sven Schnelle <svens@linux.ibm.com>,
	 Madhavan Srinivasan <maddy@linux.ibm.com>,
	 Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>,
	 Christophe Leroy <christophe.leroy@csgroup.eu>,
	 Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	 Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,  Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	 x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	 "David S. Miller" <davem@davemloft.net>,
	 Andreas Larsson <andreas@gaisler.com>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Masahiro Yamada" <masahiroy@kernel.org>,
	linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
	sparclinux@vger.kernel.org,
	"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
Subject: [PATCH v2 10/10] kbuild: simplify CC_CAN_LINK
Date: Tue, 14 Oct 2025 15:05:25 +0200	[thread overview]
Message-ID: <20251014-kbuild-userprogs-bits-v2-10-faeec46e887a@linutronix.de> (raw)
In-Reply-To: <20251014-kbuild-userprogs-bits-v2-0-faeec46e887a@linutronix.de>

All architectures supporting multiple ABIs have been migrated to
ARCH_CC_CAN_LINK. The remaining ones do not require any special flag,
so simplify the logic.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 Makefile     | 11 +++--------
 init/Kconfig |  3 +--
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/Makefile b/Makefile
index 26e5bca534e27034c355939bca4c90db435ecdbd..1b7da9f10b88f1a374ae34477e5621b4dd27c017 100644
--- a/Makefile
+++ b/Makefile
@@ -1137,17 +1137,12 @@ endif
 # Align the architecture of userspace programs with the kernel
 USERFLAGS_FROM_KERNEL := --target=%
 
-ifdef CONFIG_ARCH_USERPROGS_CFLAGS
-KBUILD_USERCFLAGS += $(CONFIG_ARCH_USERFLAGS)
-KBUILD_USERLDFLAGS += $(CONFIG_ARCH_USERFLAGS)
-else
-# If not overridden also inherit the bit size
-USERFLAGS_FROM_KERNEL += -m32 -m64
-endif
-
 KBUILD_USERCFLAGS  += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
 KBUILD_USERLDFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
 
+KBUILD_USERCFLAGS += $(CONFIG_ARCH_USERFLAGS)
+KBUILD_USERLDFLAGS += $(CONFIG_ARCH_USERFLAGS)
+
 # userspace programs are linked via the compiler, use the correct linker
 ifdef CONFIG_CC_IS_CLANG
 KBUILD_USERLDFLAGS += --ld-path=$(LD)
diff --git a/init/Kconfig b/init/Kconfig
index 4a2ae3cfbf26525a60936d9b29a74ef4319ba3a5..a0127598f2f25ffb55dbb8a0691b0aa68138fc69 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -88,8 +88,7 @@ config ARCH_HAS_CC_CAN_LINK
 config CC_CAN_LINK
 	bool
 	default ARCH_CC_CAN_LINK if ARCH_HAS_CC_CAN_LINK
-	default $(cc_can_link_user,$(m64-flag)) if 64BIT
-	default $(cc_can_link_user,$(m32-flag))
+	default $(cc_can_link_user)
 
 # Fixed in GCC 14, 13.3, 12.4 and 11.5
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113921

-- 
2.51.0


      parent reply	other threads:[~2025-10-14 13:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-14 13:05 [PATCH v2 00/10] kbuild: userprogs: introduce architecture-specific CC_CAN_LINK and userprog flags Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 01/10] kbuild: don't enable CC_CAN_LINK if the dummy program generates warnings Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 02/10] init: deduplicate cc-can-link.sh invocations Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 03/10] kbuild: allow architectures to override CC_CAN_LINK Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 04/10] riscv: Implement custom CC_CAN_LINK Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 05/10] s390: " Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 06/10] powerpc: " Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 07/10] MIPS: " Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 08/10] x86/Kconfig: " Thomas Weißschuh
2025-10-14 13:05 ` [PATCH v2 09/10] sparc: " Thomas Weißschuh
2025-10-14 13:05 ` Thomas Weißschuh [this message]

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