From mboxrd@z Thu Jan 1 00:00:00 1970 From: Milian Wolff Subject: Re: cross compiling perf Date: Mon, 27 Jun 2016 13:56:23 +0200 Message-ID: <3763103.tiqVXQm4JX@milian-kdab2> References: <16135005.c00Xa53Rc9@milian-kdab2> <20160617110056.GJ13337@kernel.org> <57674D39.1000104@huawei.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2174867.uKz0eZHoIb"; micalg="sha1"; protocol="application/pkcs7-signature" Return-path: Received: from mail.kdab.com ([176.9.126.58]:37246 "EHLO mail.kdab.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750869AbcF0L41 (ORCPT ); Mon, 27 Jun 2016 07:56:27 -0400 In-Reply-To: <57674D39.1000104@huawei.com> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: wangnan0@huawei.com Cc: acme@kernel.org, jiri@infradead.org, hekuang@huawei.com, linux-perf-users@vger.kernel.org --nextPart2174867.uKz0eZHoIb Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" On Monday, June 20, 2016 9:56:09 AM CEST Wangnan (F) wrote: > On 2016/6/17 19:00, Arnaldo Carvalho de Melo wrote: > > Adding some folks to the CC list, that either worked on the make > > infrastructure or that I know works with cross compiling environments, > > maybe they can help. > > > > More below. > > > > Em Fri, Jun 17, 2016 at 11:49:28AM +0200, Milian Wolff escreveu: > >> On Donnerstag, 16. Juni 2016 13:11:11 CEST Arnaldo Carvalho de Melo wrote: > >>> Em Wed, Jun 15, 2016 at 04:24:52PM +0200, Milian Wolff escreveu: > >>>> I'm trying to compile a more modern version of the user-space perf > >>>> tools > >>>> for an arm64 embedded target. So far, no cigar. > >>>> > >>>> Neither tools/build/Documentation nor > >>>> tools/perf/Documentation/Build.txt > >>>> explain how this should be done. Right now, I'm trying the following > >>>> from > >>>> an SDK with an environment that already sets up CC, CFLAGS etc. pp. > >>>> > >>>> [SDK] ~/milian/linux/tools/perf$ make ARCH=arm64 > >>>> CROSS_COMPILE=/home/sdk/ > >>>> sysroots/x86_64-oesdk-linux/usr/bin/aarch64-gnu-linux/aarch64-gnu-linux > >>>> - > >>>> CFLAGS="--sysroot=/home/sdk/sysroots/aarch64-gnu-linux > >>>> -I/home/milian/target- prefix/include -L/home/milian/target-prefix/lib > >>>> $CFLAGS" > >>>> > >>>> BUILD: Doing 'make -j8' parallel build > >>>> > >>>> Auto-detecting system features: > >>>> ... dwarf: [ OFF ] > >>>> ... dwarf_getlocations: [ OFF ] > >>>> ... glibc: [ OFF ] > >>>> ... gtk2: [ OFF ] > >>>> ... libaudit: [ OFF ] > >>>> ... libbfd: [ OFF ] > >>>> ... libelf: [ OFF ] > >>>> ... libnuma: [ OFF ] > >>>> ... numa_num_possible_cpus: [ OFF ] > >>>> ... libperl: [ OFF ] > >>>> ... libpython: [ OFF ] > >>>> ... libslang: [ OFF ] > >>>> ... libcrypto: [ OFF ] > >>>> ... libunwind: [ OFF ] > >>>> ... libdw-dwarf-unwind: [ OFF ] > >>>> ... zlib: [ OFF ] > >>>> ... lzma: [ OFF ] > >>>> ... get_cpuid: [ OFF ] > >>>> ... bpf: [ OFF ] > >>>> > >>>> config/Makefile:272: *** No gnu/libc-version.h found, please install > >>>> glibc- > >>>> dev[el]. Stop > > I think this error message is missleading. Let's see source code: > > ifdef NO_LIBELF > ... > else > ifeq ($(feature-libelf), 0) > ifeq ($(feature-glibc), 1) > LIBC_SUPPORT := 1 > endif > ifeq ($(BIONIC),1) > LIBC_SUPPORT := 1 > endif > ifeq ($(LIBC_SUPPORT),1) > ... > else > ifneq ($(filter s% -static%,$(LDFLAGS),),) > msg := $(error No static glibc found, please install glibc-static); > else > msg := $(error No gnu/libc-version.h found, please install > glibc-dev[el]); > endif > endif > else > ... > endif # libelf support > endif # NO_LIBELF > > So the 'libc-version.h' error message really means the failure of > feature-glibc detector. > There's many reasons cause libc detector fail. 'libc-version.h' in error > message provides > wrong clue, lead user to check this file instead of checking feature > check result. OK, so if it's the wrong clue, can you tell me what else to look at then? I'm seeing $ echo $CC aarch64-gnu-linux-gcc --sysroot=/home/yocto/SDK/E013/sdk/sysroots/aarch64-gnu- linux $ echo $PWD path/to/linux/tools/build/feature $ $CC test-glib.c $ echo $? 0 The above looks good, but from a make run I get: $ cat test-glibc.make.output test-glibc.c:1:20: fatal error: stdlib.h: No such file or directory #include ^ compilation terminated. Can I somehow figure out how it tries to compile the test-glib.c file? I.e. can I invoke "make" in a verbose mode that outputs all commands? Thanks -- Milian Wolff | milian.wolff@kdab.com | Software Engineer KDAB (Deutschland) GmbH&Co KG, a KDAB Group company Tel: +49-30-521325470 KDAB - The Qt Experts --nextPart2174867.uKz0eZHoIb Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUdzCCBGYw ggNOoAMCAQICEFEmCpMc4n+cw6VfeeByroIwDQYJKoZIhvcNAQEFBQAwgZMxCzAJBgNVBAYTAlVT MQswCQYDVQQIEwJVVDEXMBUGA1UEBxMOU2FsdCBMYWtlIENpdHkxHjAcBgNVBAoTFVRoZSBVU0VS VFJVU1QgTmV0d29yazEhMB8GA1UECxMYaHR0cDovL3d3dy51c2VydHJ1c3QuY29tMRswGQYDVQQD ExJVVE4gLSBEQVRBQ29ycCBTR0MwHhcNMDUwNjA3MDgwOTEwWhcNMTkwNjI0MTkwNjMwWjBvMQsw CQYDVQQGEwJTRTEUMBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVy bmFsIFRUUCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290MIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAt/caM+byAAQtOeBOW+0fvGwPzbX6I7bO3psRM5ek 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