perf tools: Add info about cross compiling for Android ARM
Without defining ARCH=arm, building perf for Android ARM will fail, because it needs architecture specific files. So add related relevant information to the android documentation. Signed-off-by: Joonsoo Kim <js1304@gmail.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Irina Tirdea <irina.tirdea@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1351518066-4791-1-git-send-email-js1304@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -48,7 +48,10 @@ For x86:
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II. Compile perf for Android
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You need to run make with the NDK toolchain and sysroot defined above:
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make CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}"
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For arm:
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make ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}"
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For x86:
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make ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}"
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III. Install perf
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-----------------------------------------------
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