Date:   Thu, 7 Jun 2018 10:28:51 +0000
From:   Hank Qiu <hank.qiu@....com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux/tools/perf cannot be compiled for Android - linux-4.15

Thank you for your reply.
I follow your instructions and use android-ndk-r15c and it works now.

But it's weird that I find it cannot work with android-ndk-r1, and it still throw me error "No gnu/libc-version.h found, please install glibc-dev[el]".
I compare android-ndk-r17 and android-ndk-r15c and find android-ndk-r17 is much smaller than android-ndk-r15c, almost 250MB. Maybe some big changes have been made to NDK.

Thank you again for solve my problem.

> Em Wed, Jun 06, 2018 at 05:39:33AM +0000, Hank Qiu escreveu:
> > Hi
> > I am trying to use tools/perf to tuning my Android devices.
>
> > But I cannot build it for Android successfully following the
> > instructions in tools/perf/Documentation/android.txt.
>
> > I download the latest NDK, which is android-ndk-r17 and follow the
> > instructions in section a to export NDK_TOOLCHAIN and NDK_SYSROOT for
> > arm.
>
> r17, ok, I'll create a new container with that one to see if there is something
> new, but see below for how I test it with r15c.
>
> > Then I compile perf for Android using the exact same command in this
> > documentation, but it cannot work and throw me an error "No
> > gnu/libc-version.h found, please install glibc-dev[el]".  This
> > confuses me a lot, since I am using CROSS_COMPILE toolchain for
> > Android, and I cannot just use apt install glibc-dev to solve this
> > problem, because it will install glibc to my host rather than the
> > toolchain. By the way, I already installed glibc in my host.
>
> >          My code is linux-4.15 and here are the instructions I used:
> >              export
> > NDK_TOOLCHAIN=~/android-ndk-r17/toolchains/arm-linux-androideabi-4.9/p
> > rebuilt/linux-x86_64/bin/arm-linux-androideabi-
> > export NDK_SYSROOT=~/android-ndk-r17/platforms/android-24/arch-arm
> > make WERROR=0 ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN}
> EXTRA_CFLAGS="-pie -sysroot=${NDK_SYSROOT}"
>
> > I am wondering why I cannot build it successfully for Android
> > following the documentation.
>
> > I have google it for a long time, but they all suggest me to use
> > linux-tools-perf, which don't answer why linux/tools/perf cannot be
> > used.
>
> > If anyone know how to solve this issue, please help me. Looking
> > forward to your reply.
>
> I regularly test build it using a docker container, the one below, check if there is
> something you're missing. To make it clear, the build process is all in the
> rx_and_build.sh script, the Dockerfile is just to setup the environment, which
> you already have done, so just check the env vars and how they get used up to
> the point where the build takes place in rx_and_build.sh, which is in this line:
>
> make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS" -C
> /git/linux/tools/perf O=/tmp/build/perf
>
> # cat ~/git/linux-perf-tools-build/android/r15c/arm/Dockerfile
> # docker.io/acmel/linux-perf-tools-build-android-ndk:r15c-arm
> FROM docker.io/fedora:26
> MAINTAINER Arnaldo Carvalho de Melo <acme@...nel.org> ENV
> VERSION=android-ndk-r15c ENV NDK=/opt/${VERSION} ENV
> SOURCEFILE=${VERSION}-linux-x86_64.zip
> RUN dnf -y install make bison flex gcc unzip findutils tar xz && \
>     dnf -y clean all && \
>     mkdir -m 777 -p /tmp/build/perf /tmp/build/objtool && \
>     curl -OL https://dl.google.com/android/repository/${SOURCEFILE} && \
>     unzip -d /opt ${SOURCEFILE} && \
>     rm -f ${SOURCEFILE} && \
>     rm -rf ${NDK}/sources \
>            ${NDK}/platforms/android-[19]* \
>            ${NDK}/platforms/android-2[0-5]* \
>            ${NDK}/platforms/android-26/arch-mips* \
>            ${NDK}/platforms/android-26/arch-x86* \
>            ${NDK}/toolchains/x86* \
>            ${NDK}/toolchains/mips* \
>            ${NDK}/toolchains/llvm* \
>            ${NDK}/prebuilt/ \
>            ${NDK}/python* \
>            ${NDK}/shader-tools/ &&\
>     rm -rf /usr/share/doc /usr/share/gtk-doc /usr/share/locale
> /usr/share/man RUN mkdir -m 777 -p /git /tmp/build/perf /tmp/build/objtool
> /tmp/build/linux && \
>     groupadd -r perfbuilder && \
>     useradd -m -r -g perfbuilder perfbuilder && \
>     chown -R perfbuilder.perfbuilder /tmp/build/ /git/ ENV ARCH=arm ENV
> ARM_NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt
> /linux-x86_64/bin/arm-linux-androideabi-
> ENV ARM_NDK_SYSROOT=${NDK}/platforms/android-26/arch-arm
> ENV EXTRA_CFLAGS="-Wno-attributes -Wno-unused-function -pie
> --sysroot=${ARM_NDK_SYSROOT}"
> ENV CROSS_COMPILE=${ARM_NDK_TOOLCHAIN}
> ENV EXTRA_MAKE_ARGS=WERROR=0
> USER perfbuilder
> COPY rx_and_build.sh /
> ENTRYPOINT ["/rx_and_build.sh"]
>
>
> And then the rx_and_build.sh is:
>
>
> #!/bin/sh
> # Copyright (c) Red Hat Inc. 2017-
> # Arnaldo Carvalho de Melo <acme@...hat.com> # cross build Dockerfiles
> must have ENV lines for ARCH and CROSS_COMPILE
>
> export PATH=$PATH:$EXTRA_PATH
>
> if [ -z "$1" ] ; then
>         export PERF_TARBALL=http://localhost/perf/perf-latest.tar.xz
> else
>         export PERF_TARBALL=$1
> fi
>
> cd /git
> echo "Downloading $PERF_TARBALL..."
> curl -OL $PERF_TARBALL || wget $PERF_TARBALL xzcat `basename
> $PERF_TARBALL` | tar xf - && \ mv perf-*/ linux && \
>
> cat /git/linux/HEAD
>
> # print the version for dm to harvest and put in the status line
> ${CROSS_COMPILE}gcc -v
>
> make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS" -C
> /git/linux/tools/perf O=/tmp/build/perf && \ rm -rf /tmp/build/perf/{.[^.]*,*}
> && \ make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS"
> NO_LIBELF=1 -C /git/linux/tools/perf O=/tmp/build/perf || exit 1
>
> # Bail ou if we don't have clang, print the version for dm to harvest and put in
> the status line ${CROSS_COMPILE}clang -v || exit 0
>
> rm -rf /tmp/build/perf/{.[^.]*,*} && \
> make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS" -C
> /git/linux/tools/perf O=/tmp/build/perf CC=clang && \ rm -rf
> /tmp/build/perf/{.[^.]*,*} && \ make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS"
> NO_LIBELF=1 -C /git/linux/tools/perf O=/tmp/build/perf CC=clang
>
> rm -rf /tmp/build/perf/{.[^.]*,*} && \
> make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS"
> LIBCLANGLLVM=1 -C /git/linux/tools/perf O=/tmp/build/perf CC=clang
>
> rm -rf /tmp/build/perf/{.[^.]*,*} && \
> make $EXTRA_MAKE_ARGS ARCH=$ARCH
> CROSS_COMPILE=$CROSS_COMPILE EXTRA_CFLAGS="$EXTRA_CFLAGS"
> LIBCLANGLLVM=1 -C /git/linux/tools/perf O=/tmp/build/perf
>
> # Need tp create a MANIFEST on tools/objtool and/or make sure it uses # only
> stuff in tools/include/, etc.
> #make -C /git/linux/tools/objtool O=/tmp/build/objtool && \ # # We now use
> just a detached tarball, not the whole kernel sources # accessed via NFS, so...
> #make -C /git/linux O=/tmp/build/linux defconfig && \ #make -C /git/linux
> O=/tmp/build/linux headers_install && \ #make -C /git/linux O=/tmp/build/linux
> samples/bpf/
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