Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934881AbbLRItz (ORCPT ); Fri, 18 Dec 2015 03:49:55 -0500 Received: from mail.bmw-carit.de ([62.245.222.98]:41448 "EHLO mail.bmw-carit.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932311AbbLRItw (ORCPT ); Fri, 18 Dec 2015 03:49:52 -0500 X-CTCH-RefID: str=0001.0A0C0203.5673C8A6.0341,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 Subject: Re: [PATCH 00/10] bpf samples: Uses libbpf in tools/lib to do BPF operations To: "Wangnan (F)" , , , , , , , , , , , References: <1450329794-161948-1-git-send-email-wangnan0@huawei.com> <56725868.6080902@bmw-carit.de> <56725B67.2010309@huawei.com> <56725E59.6090507@bmw-carit.de> <56727259.80002@bmw-carit.de> <567289D6.9050209@huawei.com> <5672BC99.4070605@bmw-carit.de> <567377D0.6080302@huawei.com> CC: , From: Daniel Wagner X-Enigmail-Draft-Status: N1110 Message-ID: <5673C8A6.1080806@bmw-carit.de> Date: Fri, 18 Dec 2015 09:49:42 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <567377D0.6080302@huawei.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7968 Lines: 149 On 12/18/2015 04:04 AM, Wangnan (F) wrote: > On 2015/12/17 21:46, Daniel Wagner wrote: >> On 12/17/2015 11:09 AM, Wangnan (F) wrote: >>> On 2015/12/17 16:29, Daniel Wagner wrote: >>>> On 12/17/2015 08:03 AM, Daniel Wagner wrote: >>>> Patch number 2 didn't apply cleanly. >>> When you see this, could you please have a look at: >>> >>> /home/wagi/src/linux/samples/bpf/libbpf/feature/test-*.make.output >>> >>> ? >> test-libpython.c:1:20: fatal error: Python.h: No such file or directory > > So it is the content in test-all.make.output ? Then it is > not a problem. It is only a fastpath which tries to check > all features by one test. On most platform it would fail. I see. > BPF related feature check is not in test-all. It is a potential > bug, but I don't think it causes your problem. > > Another problem is you didn't see this in the first failure: > > Auto-detecting system features: > ... libelf: [ on ] > ... bpf: [ on ] > > This only happen when you already have a FEATURE-DUMP.libbpf in that > directory and it is same as the feature check result. > > Could you please remove samples/bpf in your building tree and > try again? After you see the failure, what's the content of > > /home/wagi/src/linux/samples/bpf/libbpf/FEATURE-* ? I cleanup up my tree (rm samples/bpf/ and git checkout samples/bpf) and then $ make samples/bpf/ CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CHK include/generated/bounds.h CHK include/generated/timeconst.h CHK include/generated/asm-offsets.h CALL scripts/checksyscalls.sh LD samples/bpf/built-in.o make -C /home/wagi/src/linux/tools/lib/bpf O=/home/wagi/src/linux/samples/bpf/libbpf CFLAGS= LDFLAGS= V=1 /home/wagi/src/linux/samples/bpf/libbpf/libbpf.a Auto-detecting system features: ... libelf: [ OFF ] ... bpf: [ OFF ] No libelf found Makefile:203: recipe for target 'elfdep' failed make[2]: *** [elfdep] Error 255 samples/bpf/Makefile:10: recipe for target 'samples/bpf/libbpf/libbpf.a' failed make[1]: *** [samples/bpf/libbpf/libbpf.a] Error 2 Makefile:1550: recipe for target 'samples/bpf/' failed make: *** [samples/bpf/] Error 2 $ cat /home/wagi/src/linux/samples/bpf/libbpf/FEATURE-* feature-libelf(0) feature-bpf(0) $ make -C /home/wagi/src/linux/tools/lib/bpf O=/home/wagi/src/linux/samples/bpf/libbpf CFLAGS= LDFLAGS= V=1 /home/wagi/src/linux/samples/bpf/libbpf/libbpf.a make: Entering directory '/home/wagi/src/linux/tools/lib/bpf' Auto-detecting system features: ... libelf: [ on ] ... bpf: [ on ] make -f /home/wagi/src/linux/tools/build/Makefile.build dir=. obj=libbpf gcc -Wp,-MD,/home/wagi/src/linux/samples/bpf/libbpf/.libbpf.o.d,-MT,/home/wagi/src/linux/samples/bpf/libbpf/libbpf.o -DHAVE_LIBELF_MMAP_SUPPORT -DHAVE_ELF_GETPHDRNUM_SUPPORT -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wshadow -Wstrict-aliasing=3 -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Werror -Wall -fPIC -I. -I/home/wagi/src/linux/tools/include -I/home/wagi/src/linux/arch//include/uapi -I/home/wagi/src/linux/include/uapi -D"BUILD_STR(s)=#s" -c -o /home/wagi/src/linux/samples/bpf/libbpf/libbpf.o libbpf.c gcc -Wp,-MD,/home/wagi/src/linux/samples/bpf/libbpf/.bpf.o.d,-MT,/home/wagi/src/linux/samples/bpf/libbpf/bpf.o -DHAVE_LIBELF_MMAP_SUPPORT -DHAVE_ELF_GETPHDRNUM_SUPPORT -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wshadow -Wstrict-aliasing=3 -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Werror -Wall -fPIC -I. -I/home/wagi/src/linux/tools/include -I/home/wagi/src/linux/arch//include/uapi -I/home/wagi/src/linux/include/uapi -D"BUILD_STR(s)=#s" -c -o /home/wagi/src/linux/samples/bpf/libbpf/bpf.o bpf.c ld -r -o /home/wagi/src/linux/samples/bpf/libbpf/libbpf-in.o /home/wagi/src/linux/samples/bpf/libbpf/libbpf.o /home/wagi/src/linux/samples/bpf/libbpf/bpf.o rm -f /home/wagi/src/linux/samples/bpf/libbpf/libbpf.a; ar rcs /home/wagi/src/linux/samples/bpf/libbpf/libbpf.a /home/wagi/src/linux/samples/bpf/libbpf/libbpf-in.o make: Leaving directory '/home/wagi/src/linux/tools/lib/bpf' $ make samples/bpf/ CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CHK include/generated/bounds.h CHK include/generated/timeconst.h CHK include/generated/asm-offsets.h CALL scripts/checksyscalls.sh HOSTCC samples/bpf/test_verifier.o HOSTLD samples/bpf/test_verifier HOSTCC samples/bpf/test_maps.o HOSTLD samples/bpf/test_maps HOSTCC samples/bpf/sock_example.o HOSTCC samples/bpf/utils.o HOSTLD samples/bpf/sock_example HOSTCC samples/bpf/fds_example.o HOSTLD samples/bpf/fds_example HOSTCC samples/bpf/sockex1_user.o HOSTLD samples/bpf/sockex1 HOSTCC samples/bpf/sockex2_user.o HOSTLD samples/bpf/sockex2 HOSTCC samples/bpf/sockex3_user.o HOSTLD samples/bpf/sockex3 HOSTCC samples/bpf/tracex1_user.o HOSTLD samples/bpf/tracex1 HOSTCC samples/bpf/tracex2_user.o HOSTLD samples/bpf/tracex2 HOSTCC samples/bpf/tracex3_user.o HOSTLD samples/bpf/tracex3 HOSTCC samples/bpf/tracex4_user.o HOSTLD samples/bpf/tracex4 HOSTCC samples/bpf/tracex5_user.o HOSTLD samples/bpf/tracex5 HOSTCC samples/bpf/tracex6_user.o HOSTLD samples/bpf/tracex6 HOSTCC samples/bpf/trace_output_user.o HOSTLD samples/bpf/trace_output HOSTCC samples/bpf/lathist_user.o HOSTLD samples/bpf/lathist clang -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/5.1.1/include -I./arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -Iinclude -I./arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi -include ./include/linux/kconfig.h \ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ -O2 -emit-llvm -c samples/bpf/sockex1_kern.c -o -| ./tools/bpf/llvm/bld/Debug+Asserts/bin/llc -march=bpf -filetype=obj -o samples/bpf/sockex1_kern.o /bin/sh: line 2: ./tools/bpf/llvm/bld/Debug+Asserts/bin/llc: No such file or directory clang: error: unable to execute command: Broken pipe clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 3.5.0 (tags/RELEASE_350/final) Target: x86_64-redhat-linux-gnu Thread model: posix clang: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script. clang: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: clang: note: diagnostic msg: /tmp/sockex1_kern-d40fee.c clang: note: diagnostic msg: /tmp/sockex1_kern-d40fee.sh clang: note: diagnostic msg: ******************** samples/bpf/Makefile:83: recipe for target 'samples/bpf/sockex1_kern.o' failed make[1]: *** [samples/bpf/sockex1_kern.o] Error 127 Makefile:1550: recipe for target 'samples/bpf/' failed So the last error is clear. llc is missing I need to rebuild it. There is something funny going on for the first call 'make samples/bpf/'. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/