netdev - Re: samples/bpf compilation failures

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Date:   Wed, 26 Jun 2019 11:11:37 +0530
From:   Srinivas Ramana <sramana@...eaurora.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Joel Fernandes <joelaf@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: samples/bpf compilation failures - 5.2.0

+ Joel if he has seen this issue.

On 5/28/2019 2:27 PM, Srinivas Ramana wrote:
> Hello,
> 
> I am trying to build samples/bpf in kernel(5.2.0-rc1) but unsuccessful 
> with below errors. Can you help to point what i am missing or if there 
> is some known issue?
> 
> ==============================8<===================================
> $ make samples/bpf/ 
> LLC=/local/mnt/workspace/tools/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/llc 
> CLANG=/local/mnt/workspace/tools/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> V=1
> make -C /local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel -f 
> /local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/Makefile 
> samples/bpf/
> ................
> ................
> ................
> make KBUILD_MODULES=1 -f ./scripts/Makefile.build obj=samples/bpf
> (cat /dev/null; ) > samples/bpf/modules.order
> make -C 
> /local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/samples/bpf/../../tools/lib/bpf/ 
> RM='rm -rf' LDFLAGS= 
> srctree=/local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/samples/bpf/../../ 
> O=
> 
> Auto-detecting system features:
> ...                        libelf: [ on  ]
> ...                           bpf: [ on  ]
> 
> make -C 
> /local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/samples/bpf/../..//tools/build 
> CFLAGS= LDFLAGS= fixdep
> make -f 
> /local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/samples/bpf/../..//tools/build/Makefile.build 
> dir=. obj=fixdep
>     ld -r -o fixdep-in.o  fixdep.o
> ld: fixdep.o: Relocations in generic ELF (EM: 183)
> ld: fixdep.o: Relocations in generic ELF (EM: 183)
> fixdep.o: error adding symbols: File in wrong format
> make[5]: *** [fixdep-in.o] Error 1
> make[4]: *** [fixdep-in.o] Error 2
> make[3]: *** [fixdep] Error 2
> make[2]: *** 
> [/local/mnt/workspace/sramana/kdev_torvalds/kdev/kernel/samples/bpf/../../tools/lib/bpf/libbpf.a] 
> Error 2
> make[1]: *** [samples/bpf/] Error 2
> make: *** [sub-make] Error 2
> ==============================>8=======================================
> 
> 
> I am using the below commands to build:
> ========================================================
> export ARCH=arm64
> export CROSS_COMPILE=<path>linaro-toolchain/5.1/bin/aarch64-linux-gnu-
> export CLANG_TRIPLE=arm64-linux-gnu-
> 
> make 
> CC=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> defconfig
> 
> make 
> CC=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> -j8
> 
> make 
> CC=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> headers_install INSTALL_HDR_PATH=./usr
> 
> make samples/bpf/ 
> LLC=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/llc 
> CLANG=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> V=1 
> CC=<path>/clang_ubuntu/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-14.04/bin/clang 
> 
> ========================================================
> 
> Thanks,
> -- Srinivas R
> 


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