From mboxrd@z Thu Jan 1 00:00:00 1970 From: mhiramat@kernel.org (Masami Hiramatsu) Date: Sun, 25 Feb 2018 20:00:09 +0900 Subject: [BUG] arm64: Build error with gcc 6 In-Reply-To: <20180225051440.7d4ab5ajbb7lhdcr@sapphire.tkos.co.il> References: <20180225115037.5613c91f061163dcf1d36023@kernel.org> <20180225051440.7d4ab5ajbb7lhdcr@sapphire.tkos.co.il> Message-ID: <20180225200009.80ba37b7837f9f1fb34f64fb@kernel.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sun, 25 Feb 2018 07:14:44 +0200 Baruch Siach wrote: > Hi Masami Hiramatsu, > > On Sun, Feb 25, 2018 at 11:50:37AM +0900, Masami Hiramatsu wrote: > > commit e1a50de37860 ("arm64: cputype: Silence Sparse warnings") > > introduces "UL" suffix to a hex number, but it causes a build error with gcc-6 series. > > I've hit below error with 6.2.1 and 6.4.1. Of course this is resolved by the latest > > stable gcc-7.2.1. But from the compatibility point of view, should we revert it? > > > > AS arch/arm64/kernel/head.o > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S: Assembler messages: > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')' > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')' > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L', expected: ')' > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: junk at end of line, first unrecognized character is `L' > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: unexpected characters following instruction at operand 2 -- `movz x1,:abs_g1_s:0xff00ffffffUL' > > /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: unexpected characters following instruction at operand 2 -- `movk x1,:abs_g0_nc:0xff00ffffffUL' > > make[2]: *** [/home/mhiramat/ksrc/linux/scripts/Makefile.build:425: arch/arm64/kernel/head.o] error 1 > > > > I've checked with below 2 latest gccs. > > > > http://releases.linaro.org/components/toolchain/binaries/latest-6/aarch64-linux-gnu/gcc-linaro-6.4.1-2017.11-x86_64_aarch64-linux-gnu.tar.xz > > > > http://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu.tar.xz > > The fix is pending: > > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?h=fixes/core&id=04c4927359b1f09310bfee92e7187c9022be3e00 > > This is in Linus' tree now, so should be in -rc3. Great! I used linux-next tree and hit above bug, so I'll use linus tree. Thank you, -- Masami Hiramatsu