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[PATCH 4/4] perf tool: Update android build documentation

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Update the android build documentation according to recent android build
fixes. The instructions for step 1a and step 2 were updated to work with
NDK version 11(oldest supported version) and NDK version 12(current
version).

Signed-off-by: Chris Phlipot <cphlipot0@gmail.com>
---
 tools/perf/Documentation/android.txt | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/perf/Documentation/android.txt b/tools/perf/Documentation/android.txt
index 8484c3a..24a5999 100644
--- a/tools/perf/Documentation/android.txt
+++ b/tools/perf/Documentation/android.txt
@@ -12,14 +12,14 @@ Set the NDK variable to point to the path where you installed the NDK:
 
 2. Set cross-compiling environment variables for NDK toolchain and sysroot.
 For arm:
-  export NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-
-  export NDK_SYSROOT=${NDK}/platforms/android-9/arch-arm
+  export NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
+  export NDK_SYSROOT=${NDK}/platforms/android-24/arch-arm
 For x86:
-  export NDK_TOOLCHAIN=${NDK}/toolchains/x86-4.6/prebuilt/linux-x86/bin/i686-linux-android-
-  export NDK_SYSROOT=${NDK}/platforms/android-9/arch-x86
+  export NDK_TOOLCHAIN=${NDK}/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-
+  export NDK_SYSROOT=${NDK}/platforms/android-24/arch-x86
 
-This method is not working for Android NDK versions up to Revision 8b.
-perf uses some bionic enhancements that are not included in these NDK versions.
+This method is only tested for Android NDK versions Revision 11b and later.
+perf uses some bionic enhancements that are not included in prior NDK versions.
 You can use method (b) described below instead.
 
 (b). Use the Android source tree
@@ -49,9 +49,9 @@ II. Compile perf for Android
 ------------------------------------------------
 You need to run make with the NDK toolchain and sysroot defined above:
 For arm:
-  make ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}"
+  make WERROR=0 ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
 For x86:
-  make ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}"
+  make WERROR=0 ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
 
 III. Install perf
 -----------------------------------------------
-- 
2.7.4

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[PATCH 0/4] perf tool: Fix Android build Chris Phlipot <cphlipot0@gmail.com> - 2016-07-01 07:20 +0200
  [PATCH 3/4] perf tool: Fix build when sysconf doesn't support cache line size Chris Phlipot <cphlipot0@gmail.com> - 2016-07-01 07:20 +0200
    Re: [PATCH 3/4] perf tool: Fix build when sysconf doesn't support  cache line size Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-07-05 00:50 +0200
      Re: [PATCH 3/4] perf tool: Fix build when sysconf doesn't support  cache line size Chris Phlipot <cphlipot0@gmail.com> - 2016-07-05 02:20 +0200
        Re: [PATCH 3/4] perf tool: Fix build when sysconf doesn't support  cache line size Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-07-05 02:30 +0200
          Re: [PATCH 3/4] perf tool: Fix build when sysconf doesn't support  cache line size Chris Phlipot <cphlipot0@gmail.com> - 2016-07-05 02:50 +0200
            Re: [PATCH 3/4] perf tool: Fix build when sysconf doesn't support  cache line size Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-07-05 03:00 +0200
  [PATCH 2/4] tools lib subcmd: Respect WERROR=0 for build Chris Phlipot <cphlipot0@gmail.com> - 2016-07-01 07:20 +0200
    [tip:perf/core] tools lib subcmd: Respect WERROR=0 for build tip-bot for Chris Phlipot <tipbot@zytor.com> - 2016-07-05 12:30 +0200
  [PATCH 1/4] tools lib api: Respect WERROR=0 for build Chris Phlipot <cphlipot0@gmail.com> - 2016-07-01 07:20 +0200
    [tip:perf/core] tools lib api: Respect WERROR=0 for build tip-bot for Chris Phlipot <tipbot@zytor.com> - 2016-07-05 12:30 +0200
  [PATCH 4/4] perf tool: Update android build documentation Chris Phlipot <cphlipot0@gmail.com> - 2016-07-01 07:20 +0200
    [tip:perf/core] perf tools: Update android build documentation tip-bot for Chris Phlipot <tipbot@zytor.com> - 2016-07-05 12:30 +0200

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