From: Kang Kai <Kai.Kang@windriver.com>
To: Fathi Boudra <fathi.boudra@linaro.org>
Cc: openembedded-core <openembedded-core@lists.openembedded.org>
Subject: Re: [PATCH 9/9] perf: disable libunwind support for aarch64
Date: Tue, 23 Sep 2014 14:11:43 +0800 [thread overview]
Message-ID: <54210F1F.10907@windriver.com> (raw)
In-Reply-To: <CAGNsrLCEAtiAW5GpN7K-6jTuK0EgOyduVAREUyVhVt1gb4A-xg@mail.gmail.com>
On 2014年09月23日 00:01, Fathi Boudra wrote:
> On 19 September 2014 12:21, Kai Kang <kai.kang@windriver.com> wrote:
>> Disable libunwind support of perl for aarch aarch64 that libunwind
>> doesn't support aarch64.
> typo:
> perl -> perf
> aarch -> arch
>
> Otherwise, the patch doesn't seems correct. libunwind supports aarch64
> since libunwind 1.1 (you need to build with --enable-debug-frame).
When do configure, it fails with:
| checking for ELF helper width... configure: error: Unknown ELF target:
aarch64
It could be fixed by patching configure.ac:
--- configure.ac.orig 2014-09-23 13:30:23.415975656 +0800
+++ configure.ac 2014-09-23 13:30:47.991976326 +0800
@@ -137,7 +137,7 @@
AC_MSG_CHECKING([for ELF helper width])
case "${target_arch}" in
(arm|hppa|ppc32|x86|sh) use_elf32=yes; AC_MSG_RESULT([32]);;
-(ia64|ppc64|x86_64) use_elf64=yes; AC_MSG_RESULT([64]);;
+(aarch64|ia64|ppc64|x86_64) use_elf64=yes; AC_MSG_RESULT([64]);;
(mips) use_elfxx=yes; AC_MSG_RESULT([xx]);;
*) AC_MSG_ERROR([Unknown ELF target: ${target_arch}])
esac
And then it fails with do compile either:
| ../include/libunwind.h:25:3: error: #error "Unsupported arch"
In include/libunwind.h.in, it checks arch and include header accordingly.
For aarch64, it lacks arch check and header file libunwind-arm64.h or
libunwind-aarch64.h.
Thanks,
Kai
>
>> Signed-off-by: Kai Kang <kai.kang@windriver.com>
>> ---
>> meta/recipes-kernel/perf/perf-features.inc | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/meta/recipes-kernel/perf/perf-features.inc b/meta/recipes-kernel/perf/perf-features.inc
>> index 2dbbb47..7de35f3 100644
>> --- a/meta/recipes-kernel/perf/perf-features.inc
>> +++ b/meta/recipes-kernel/perf/perf-features.inc
>> @@ -1,4 +1,5 @@
>> PERF_FEATURES_ENABLE ?= "perf-scripting perf-tui perf-libunwind"
>> +PERF_FEATURES_ENABLE_remove_aarch64 = "perf-libunwind"
>>
>> def perf_feature_enabled(feature, trueval, falseval, d):
>> """
>> --
>> 1.9.1
>>
>> --
>> _______________________________________________
>> Openembedded-core mailing list
>> Openembedded-core@lists.openembedded.org
>> http://lists.openembedded.org/mailman/listinfo/openembedded-core
>
--
Regards,
Neil | Kai Kang
next prev parent reply other threads:[~2014-09-23 6:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 9:21 [PATCH 0/9] V3: Add machine qemuaarch64 Kai Kang
2014-09-19 9:21 ` [PATCH 1/9] linux-yocto: depend on libgcc for aarch64 Kai Kang
2014-09-19 9:21 ` [PATCH 2/9] Add machine qemuarm64 Kai Kang
2014-09-19 9:21 ` [PATCH 3/9] gcc-4.9: redefine default library install directory Kai Kang
2014-09-19 9:21 ` [PATCH 4/9] libatomics-ops: add aarch64 target iniitial support Kai Kang
2014-09-19 9:21 ` [PATCH 5/9] qt4-native: add aarch64 support Kai Kang
2014-09-19 9:21 ` [PATCH 6/9] qt4: " Kai Kang
2014-09-19 9:21 ` [PATCH 7/9] qt4-embedded: disable webkit Kai Kang
2014-09-19 9:21 ` [PATCH 8/9] libpng: add neon option for aarch64 Kai Kang
2014-09-19 9:21 ` [PATCH 9/9] perf: disable libunwind support " Kai Kang
2014-09-22 16:01 ` Fathi Boudra
2014-09-23 6:11 ` Kang Kai [this message]
2014-09-23 8:23 ` Fathi Boudra
2014-09-23 9:13 ` Kang Kai
-- strict thread matches above, loose matches on Subject: below --
2014-09-16 15:06 [PATCH 0/9] V2: Add machine qemuaarch64 Kai Kang
2014-09-16 15:06 ` [PATCH 9/9] perf: disable libunwind support for aarch64 Kai Kang
2014-09-18 7:07 ` Khem Raj
2014-09-18 9:38 ` Kang Kai
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