[PATCH 0/4] perf tool: Fix Android build

[Chris Phlipot]

It looks like the tools/perf/Documentation/android.txt hasn't been updated
in a while. Following the instructions in this document to cross-compile
perf for Android results in several build errors.

This patch-set aims to fix/workaround the incompatibilities introduced
since the android perf build was last tested.

The changes were tested to build for ubuntu 16.04 as well as cross compile
for android using NDK Versions 11 and 12.

to test android arm cross compile:

$ wget http://dl.google.com/android/repository/android-ndk-r12-linux-x86_64.zip
$ unzip android-ndk-r12-linux-x86_64.zip
$ export NDK_TOOLCHAIN=`pwd`/android-ndk-r12/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
$ export NDK_SYSROOT=`pwd`/android-ndk-r12/platforms/android-24/arch-arm
$ make WERROR=0 ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"


Chris Phlipot (4):
  tools lib api: Respect WERROR=0 for build
  tools lib subcmd: Respect WERROR=0 for build
  perf tool: Fix build when sysconf doesn't support cache line size
  perf tool: Update android build documentation

 tools/lib/api/Makefile               |  8 +++++++-
 tools/lib/subcmd/Makefile            |  8 +++++++-
 tools/perf/Documentation/android.txt | 16 ++++++++--------
 tools/perf/perf.c                    |  4 ++++
 4 files changed, 26 insertions(+), 10 deletions(-)

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2.7.4