Re: [LTP] LTP cross compilation

[Hichem Boussetta <boussettahichem@yahoo.fr>]

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Hichem Boussetta a écrit :
> Hi all,
>
> It is the first time that I use ltp and I am having some troubles 
> trying to cross compile it.
> I have seen a cross compilation example in the installation manual. It 
> is about cross compiling for a powerpc processor.
>
> CROSS_COMPILER=/opt/ppc64/powerpc64-linux/bin/powerpc64-linux-
> CROSS_CFLAGS= -mpowerpc64
> LDFLAGS=-static
> LOADLIBES=-lpthread -lc -lresolv -lnss_dns -lnss_files -lm -lc
> LIB_DIR=/lib64
> export LOADLIBES LIB_DIR
>
> In my case, I a compiling for an arm processor. I tried to do the same 
> by the specifying the toolchain prefix, the CC, LD, AR and the 
> LIB_DIR. But, I get always this error when cross compiling :
>
> getdelays.c: In function 'print_delayacct':
> getdelays.c:215: error: 'struct taskstats' has no member named 
> 'freepages_count'
> getdelays.c:216: error: 'struct taskstats' has no member named 
> 'freepages_delay_total'
> make[5]: *** [getdelays] Erreur 1
>
> In fact, I omitted the libraries nss_dns and lnss_files since didn't 
> find them in the lib directories of my toolchain. I am not sure about 
> that, but I don't think the problem is related to this libraries since 
> they do not exist in my host machine either, and here, the compilation 
> of ltp worked well. Perhaps, the problem is due to the fact that I 
> didn't put any option in the CROSS_CFLAGS since I found nowhere how to 
> get this information.
>
> If someone knows any thing about this or succeeded to cross compile 
> ltp, it would be really nice if he could tell me, because I am really 
> stuck now :-)
>
> Thanks,
>
Hi all,

I think that I've figured out how to configure LTP for cross
compilation. In fact, we need to put the right parameters during the
configuration. We should append the cross toolchain's bin directory to
the path and add --host=$(toolchain_prefix) to the configure script. By
doing that, ltp succeds to find out the binary utilities that it should
use (gcc, ld ,ar, ranlib, ...). We should also specify the path to the
include and lib directory of the toolchain we are using by setting the
variables CPPFLAGS and LDFLAGS. However, I still get a compilation error
that I think it is related to the fact that some libraries are missing
(signalfd for example). The message I receive is this :

getdelays.c: In function 'print_delayacct':
getdelays.c:215: error: 'struct taskstats' has no member named
'freepages_count'
getdelays.c:216: error: 'struct taskstats' has no member named
'freepages_delay_total'

Does anyone know how to overcome this problem or does this mean that it
is not possible to cross compile LTP ? In fact, the crosstoolchains I am
using are generated using crosstool-ng. So, I don't think that the
problem is due to the toolchain.

Regards,

-- 
Hichem BOUSSETTA
Elève ingénieur
Ecole Polytechnique de Tunisie




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