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Mon, 19 Oct 2026 17:23:27 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-ThreadId: A0r3NTwFBk5k Date: Mon, 19 Oct 2026 23:20:56 +0200 From: "Arnd Bergmann" To: "Dinh Nguyen" , "schuster.simon@siemens-energy.com" Cc: =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , linux-kernel@vger.kernel.org Message-Id: In-Reply-To: <20261019165015.2656521-1-dinguyen@kernel.org> References: <20261019165015.2656521-1-dinguyen@kernel.org> Subject: Re: [PATCH 1/2] nios2: remove libgcc for lshrdi3, ashldi3, ashrdi3, muldi3, and ucmpdi2 Content-Type: text/plain Content-Transfer-Encoding: 7bit On Mon, Oct 19, 2026, at 18:50, Dinh Nguyen wrote: > Use the kernel's runtime support for lshrdi3, ashldi3, ashrdi3, muldi3, > and ucmpdi2. > > Suggested-by: Arnd Bergmann > Signed-off-by: Dinh Nguyen You still link against libgcc in addition to the in-kernel copies of these functions. While this may work correctly depending on the link order, what I had suggested here is to remove libgcc entirely here: diff --git a/arch/nios2/Makefile b/arch/nios2/Makefile index f1ff4ce0f1a2..173588c31abf 100644 --- a/arch/nios2/Makefile +++ b/arch/nios2/Makefile @@ -19,8 +19,6 @@ UTS_SYSNAME = Linux export MMU -LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name) - KBUILD_AFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION) KBUILD_CFLAGS += -pipe -D__linux__ -D__ELF__ @@ -37,7 +35,7 @@ KBUILD_CFLAGS += -DUTS_SYSNAME=\"$(UTS_SYSNAME)\" KBUILD_CFLAGS += -fno-builtin KBUILD_CFLAGS += -G 0 -libs-y += arch/nios2/lib/ $(LIBGCC) +libs-y += arch/nios2/lib/ INSTALL_PATH ?= /tftpboot nios2-boot := arch/$(ARCH)/boot I expect you'll have to copy a few functions from the last gcc release into arch/nios2/lib/ to make this work, at least (a GPLv2 compatible version of) libgcc/config/nios2/lib2-divmod.c but maybe more. Arnd