From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: [PATCH] perf tools, x86: fix 32-bit compile on 64-bit system Date: Fri, 15 Jul 2011 09:27:20 -0600 Message-ID: <4E205C58.30607@gmail.com> References: <1310420304-21452-1-git-send-email-dsahern@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-iy0-f174.google.com ([209.85.210.174]:51111 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752174Ab1GOP1Z (ORCPT ); Fri, 15 Jul 2011 11:27:25 -0400 In-Reply-To: <1310420304-21452-1-git-send-email-dsahern@gmail.com> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: mingo@elte.hu, fweisbec@gmail.com Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, acme@ghostprotocols.net, peterz@infradead.org, paulus@samba.org On 07/11/2011 03:38 PM, David Ahern wrote: > Builds for 32-bit binaries on a 64-bit host currently fail with the error: > > gcc -o /tmp/perf-ppc/bench/mem-memcpy-x86-64-asm.o -c -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Wformat-y2k -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -m32 -fstack-protector-all -Wstack-protector -Wvolatile-register-var -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Iutil/include -Iarch/x86/include -I/tmp/perf-ppc/ -DLIBELF_NO_MMAP -DDWARF_SUPPORT -DNO_NEWT_SUPPORT -DNO_LIBPERL -DNO_LIBPYTHON -DHAVE_CPLUS_DEMANGLE -DNO_STRLCPY -DARCH_X86_64 bench/mem-memcpy-x86-64-as m.S > bench/../../../arch/x86/lib/memcpy_64.S: Assembler messages: > bench/../../../arch/x86/lib/memcpy_64.S:29: Error: bad register name `%rdi' > bench/../../../arch/x86/lib/memcpy_64.S:34: Error: invalid instruction suffix for `movs' > bench/../../../arch/x86/lib/memcpy_64.S:50: Error: bad register name `%rdi' > bench/../../../arch/x86/lib/memcpy_64.S:61: Error: bad register name `%rdi' > ... > > The problem is the detection of the host arch without considering passed in > flags. This change fixes 32-bit builds via: > > make EXTRA_CFLAGS=-m32 > > and 64-bit builds still reference the memcpy_64.S. > Fairly trivial change to the Makefile. Any objections? I believe Arnaldo is out for a few more days and realistically another week to get through a month's backlog. David > Signed-off-by: David Ahern > --- > tools/perf/Makefile | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/tools/perf/Makefile b/tools/perf/Makefile > index 940257b..c168366 100644 > --- a/tools/perf/Makefile > +++ b/tools/perf/Makefile > @@ -52,7 +52,10 @@ ifeq ($(ARCH),i386) > endif > ifeq ($(ARCH),x86_64) > ARCH := x86 > - IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1) > + IS_X86_64 := 0 > + ifeq (, $(findstring m32,$(EXTRA_CFLAGS))) > + IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1) > + endif > ifeq (${IS_X86_64}, 1) > RAW_ARCH := x86_64 > ARCH_CFLAGS := -DARCH_X86_64