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Subject[PATCH 15/16] perf tools: Update android build documentation
Date
From: Chris Phlipot <cphlipot0@gmail.com>

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>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1467349955-1135-5-git-send-email-cphlipot0@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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 8484c3a04a6a..24a59998fc91 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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