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    <div class="moz-cite-prefix">Hi<br>

      <br>

      After some research about compilation error with uclibc relative

      to shm_open, I finally found a patch for my toolchain :

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      <a

href="http://lists.uclibc.org/pipermail/uclibc/2009-February/041886.html">http://lists.uclibc.org/pipermail/uclibc/2009-February/041886.html</a><br>

      This patch add missing file for uclibc 0.9.30.1...<br>

      <br>

      This patch fix shm_open issue with 2.1.0 and 2.3.0 version of LTT.<br>

      <br>

      Now just need to test if my work around in getcpu.h allow the tool

      to work correctly. So like often, just need to use the good key

      word in google to find a way out hehe.<br>

      <br>

      Arthur.<br>

      <br>

      On 25/09/2013 18:17, Jérémie Galarneau wrote:<br>

    </div>

    <blockquote

cite="mid:CA+jJMxuPudXDiatZfWVwUvvHJ9_WJ4gg_4vUeFapKZet4G-UFw@mail.gmail.com"

      type="cite">

      <pre wrap="">On Wed, Sep 25, 2013 at 7:06 AM, Arthur LAMBERT

<a class="moz-txt-link-rfc2396E" href="mailto:arthur.lambert@sagemcom.com"><arthur.lambert@sagemcom.com></a> wrote:

</pre>

      <blockquote type="cite">

        <pre wrap="">Hi,

I am using backfire version of Openwrt and would like to try to use

profiling features bring by tools like lttng. I found some Makefile packages

on openwrt website to build lttng-tools and lttng-ust with recent version of

openwrt version but I am not able to compile lttng without error. with

mine..

Environment :

Openwrt Backfire

UCLIBC 0.9.31

Linux kernel 2.6.28

</pre>

      </blockquote>

      <pre wrap="">

Please note that kernel tracing is only available on kernels >= 2.6.38

(or 2.6.32 if patched appropriately).

I'm not an openwrt user, but it seems Makefiles are only provided for

LTTng 2.1.0. Can you confirm whether or not the build succeeds for

that version?

</pre>

      <blockquote type="cite">

        <pre wrap="">ARCH mips32

lttng version : 2.3.0

librcu version : 0.8

First problem was related to lttng-ust-2.3.0/libringbuffer/getcpu.h. I get

an undefined reference to c variable in lttng_ust_get_cpu function. After

some research I was not able to find a solution about this point even if I

seem to be up to date since I found some patch related to issue with old

version of uclibc than 0.9.32. This patch seems to be already integrated in

my lttng ust version. Anyway, I found a workaround to check that the next

step on the compilation is find... but it is not...

</pre>

      </blockquote>

      <pre wrap="">

Could you clarify what was the error and what is the workaround?

</pre>

      <blockquote type="cite">

        <pre wrap="">Compilation result :

make package/lttng-tools/compile V=99

make[1]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt'

make[2]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/feeds/tools/libs/liburcu'

make[2]: Leaving directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/feeds/tools/libs/liburcu'

make[2]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/package/e2fsprogs'

WARNING: skipping e2fsprogs -- package not selected

WARNING: skipping uuidgen -- package not selected

WARNING: skipping libext2fs -- package not selected

WARNING: skipping tune2fs -- package not selected

WARNING: skipping resize2fs -- package not selected

WARNING: skipping badblocks -- package not selected

WARNING: skipping blkid -- package not selected

make[2]: Leaving directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/package/e2fsprogs'

make[2]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/feeds/tools/devel/lttng-ust'

CFLAGS="-Os -pipe -mabi=32 -mtune=mips32 -fno-strict-aliasing -g3

-fhonour-copts -msoft-float

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/usr/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/usr/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/include

" CXXFLAGS="-Os -pipe -mabi=32 -mtune=mips32 -fno-strict-aliasing -g3

-fhonour-copts -msoft-float

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/usr/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/usr/include

-I/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/include

"

LDFLAGS="-L/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/usr/lib

-L/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/target-mips_uClibc-0.9.30.1/lib

-L/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/usr/lib

-L/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/staging_dir/toolchain-mips_gcc-4.4.2_uClibc-0.9.30.1/lib

" make  -j2 -C

/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0/.

AR=mips-openwrt-linux-uclibc-ar AS="mips-openwrt-linux-uclibc-gcc -c -Os

-pipe -mabi=32 -mtune=mips32 -fno-strict-aliasing -g3 -fhonour-copts

-msoft-float" LD=mips-openwrt-linux-uclibc-ld

NM=mips-openwrt-linux-uclibc-nm CC="mips-openwrt-linux-uclibc-gcc"

GCC="mips-openwrt-linux-uclibc-gcc" CXX="mips-openwrt-linux-uclibc-g++"

RANLIB=mips-openwrt-linux-uclibc-ranlib

STRIP=mips-openwrt-linux-uclibc-strip

OBJCOPY=mips-openwrt-linux-uclibc-objcopy

OBJDUMP=mips-openwrt-linux-uclibc-objdump

SIZE=mips-openwrt-linux-uclibc-size CROSS="mips-openwrt-linux-uclibc-"

ARCH="mips" ;

make[3]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0'

make  all-recursive

make[4]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0'

Making all in .

make[5]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0'

make[5]: Nothing to be done for `all-am'.

make[5]: Leaving directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0'

Making all in include

make[5]: Entering directory

`/home/g179168/middleware/dev/TELEFONICA_3_32_X/openwrt/build_dir/target-mips_uClibc-0.9.30.1/lttng-ust-2.3.0/include'