[Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

Hi

I translated the xddp-echo.c example to work with alchemy and rt_tasks
rather than posix threads.

It was needed to include the header for alchemy tasks: #include
<alchemy/task.h> and maintain: <rtdm.h/ipc.h>

It was compiled with a simple make file specifying in xeno-config just
alchemy skin to get the compilation flags, however when running it gives an
error:

socket address family not supported by protocol

To workaround the makefile was modified to get the compilation flags for
both skins (as shown below).

But there are any other way of compiling programs that use XDDP real time
sockets and alchemy API?

For the original version POSIX version xeno-config returns the correct
compilation flags specifying rtdm skin or posix skin. It is not needed to
specify both.

The makefile to get flags for RTDM and Alchemy:

https://xenomai.org/documentation/trunk/html/api/xddp-label_8c-example.html

the compilation flags to compile it

skin1   :=  alchemy
skin2   :=  rtdm

CFLAGS  := $(shell xeno-config --skin=$(skin1) --cflags)
CFLAGS  += $(shell xeno-config --skin=$(skin2) --cflags)
LDFLAGS := $(shell xeno-config --skin=$(skin1) --ldflags)
LDFLAGS += $(shell xeno-config --skin=$(skin2) --ldflags)

$(target): $(target).c
$(CC) -o $@ $< $(CFLAGS) $(LDFLAGS)



-- 
Helder Daniel
UALG - FCT
DEEI

http://w3.ualg.pt/~hdaniel

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

It seems that the problem is not as simple as I thought.
Now I can not run even: xddp-echo.c example.
It gives always the same error:

socket: address family not supported by protocol

I take a look in the Xenomai forum:

http://www.xenomai.org/pipermail/xenomai/2014-February/030127.html

And the app is compiled with the wrap flags:

cc -o xddp-echo xddp-echo.c -I/usr/xenomai/include/cobalt
-I/usr/xenomai/include -D_GNU_SOURCE -D_REENTRANT -D__COBALT__
-Wl,@/usr/xenomai/lib/cobalt.wrappers   -L/usr/xenomai/lib -lcobalt
-lpthread -lrt    -lfuse

Now I am stucked. Any suggestions on what might be happening?


On 18 March 2015 at 15:12, Helder Daniel <hdaniel@ualg.pt> wrote:

> Hi
>
> I translated the xddp-echo.c example to work with alchemy and rt_tasks
> rather than posix threads.
>
> It was needed to include the header for alchemy tasks: #include
> <alchemy/task.h> and maintain: <rtdm.h/ipc.h>
>
> It was compiled with a simple make file specifying in xeno-config just
> alchemy skin to get the compilation flags, however when running it gives an
> error:
>
> socket address family not supported by protocol
>
> To workaround the makefile was modified to get the compilation flags for
> both skins (as shown below).
>
> But there are any other way of compiling programs that use XDDP real time
> sockets and alchemy API?
>
> For the original version POSIX version xeno-config returns the correct
> compilation flags specifying rtdm skin or posix skin. It is not needed to
> specify both.
>
> The makefile to get flags for RTDM and Alchemy:
>
> https://xenomai.org/documentation/trunk/html/api/xddp-label_8c-example.html
>
> the compilation flags to compile it
>
> skin1   :=  alchemy
> skin2   :=  rtdm
>
> CFLAGS  := $(shell xeno-config --skin=$(skin1) --cflags)
> CFLAGS  += $(shell xeno-config --skin=$(skin2) --cflags)
> LDFLAGS := $(shell xeno-config --skin=$(skin1) --ldflags)
> LDFLAGS += $(shell xeno-config --skin=$(skin2) --ldflags)
>
> $(target): $(target).c
> $(CC) -o $@ $< $(CFLAGS) $(LDFLAGS)
>
>
>
> --
> Helder Daniel
> UALG - FCT
> DEEI
>
> http://w3.ualg.pt/~hdaniel
>



-- 
Helder Daniel
UALG - FCT
DEEI

http://w3.ualg.pt/~hdaniel

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

I also took a look here:

http://comments.gmane.org/gmane.linux.real-time.xenomai.users/11767

I did a: nm -s xddp-echo > symbols

cat symbols | grep sock
                 U __wrap_setsockopt
                 U __wrap_socket

So the wrappers seems to be applied.

I ran the example a few hours ago.

Xenomai version is:

/usr/xenomai/sbin/version -a
Xenomai/cobalt v3.0-rc3 --
Target: x86_64-unknown-linux-gnu
Compiler: gcc version 4.9.2 (Debian 4.9.2-10)
Build args:  '--with-core=cobalt' '--enable-registry' '--enable-pshared'
'--enable-debug' '--enable-smp'

Coblat kernel seems to boot fine:

 dmesg | grep -i xeno
[    1.607919] [Xenomai] scheduling class idle registered.
[    1.607942] [Xenomai] scheduling class rt registered.
[    1.608222] I-pipe: head domain Xenomai registered.
[    1.624274] [Xenomai] Cobalt v3.0-rc3 (Exact Zero)
[   19.973669] *** RTnet for Xenomai v3.0-rc3 ***


Here is the complete output of: nm -s xddp-echo

                 U asprintf@@GLIBC_2.2.5
0000000000601cc0 B __bss_start
0000000000601cc0 b completed.6661
0000000000601c00 D __data_start
0000000000601c00 W data_start
0000000000400ee0 t deregister_tm_clones
0000000000400f60 t __do_global_dtors_aux
0000000000601898 t __do_global_dtors_aux_fini_array_entry
0000000000601c08 D __dso_handle
00000000006018a8 d _DYNAMIC
0000000000601cc0 D _edata
0000000000601cd8 B _end
                 U __errno_location@@GLIBC_2.2.5
                 U exit@@GLIBC_2.2.5
0000000000400fa6 t fail
0000000000401514 T _fini
0000000000400f80 t frame_dummy
0000000000601890 t __frame_dummy_init_array_entry
0000000000401888 r __FRAME_END__
00000000004016d0 r __FUNCTION__.6521
0000000000601ac0 d _GLOBAL_OFFSET_TABLE_
                 w __gmon_start__
0000000000400c88 T _init
0000000000601898 t __init_array_end
0000000000601890 t __init_array_start
0000000000401520 R _IO_stdin_used
                 w _ITM_deregisterTMCloneTable
                 w _ITM_registerTMCloneTable
00000000006018a0 d __JCR_END__
00000000006018a0 d __JCR_LIST__
                 w _Jv_RegisterClasses
0000000000401510 T __libc_csu_fini
00000000004014a0 T __libc_csu_init
                 U __libc_start_main@@GLIBC_2.2.5
000000000040128e T main
                 U memset@@GLIBC_2.2.5
0000000000601c40 d msg
0000000000601cd0 B nrt
                 U perror@@GLIBC_2.2.5
                 U pthread_attr_init@@GLIBC_2.2.5
                 U pthread_attr_setdetachstate@@GLIBC_2.2.5
                 U pthread_attr_setinheritsched@@GLIBC_2.2.5
                 U pthread_attr_setschedparam@@GLIBC_2.2.5
                 U pthread_attr_setschedpolicy@@GLIBC_2.2.5
                 U pthread_cancel@@GLIBC_2.2.5
                 U pthread_sigmask@@GLIBC_2.2.5
0000000000400fc8 t realtime_thread
0000000000400f20 t register_tm_clones
00000000004011ba t regular_thread
0000000000601cc8 B rt
                 U sigaddset@@GLIBC_2.2.5
                 U sigemptyset@@GLIBC_2.2.5
0000000000400eb0 T _start
                 U strlen@@GLIBC_2.2.5
0000000000601cc0 D __TMC_END__
                 U __wrap_bind
                 U __wrap_clock_nanosleep
                 U __wrap_free
                 U __wrap_open
                 U __wrap_printf
                 U __wrap_pthread_create
                 U __wrap_pthread_join
                 U __wrap_read
                 U __wrap_recvfrom
                 U __wrap_sendto
                 U __wrap_setsockopt
                 U __wrap_sigwait
                 U __wrap_socket
                 U __wrap_write


On 18 March 2015 at 15:54, Helder Daniel <hdaniel@ualg.pt> wrote:

> It seems that the problem is not as simple as I thought.
> Now I can not run even: xddp-echo.c example.
> It gives always the same error:
>
> socket: address family not supported by protocol
>
> I take a look in the Xenomai forum:
>
> http://www.xenomai.org/pipermail/xenomai/2014-February/030127.html
>
> And the app is compiled with the wrap flags:
>
> cc -o xddp-echo xddp-echo.c -I/usr/xenomai/include/cobalt
> -I/usr/xenomai/include -D_GNU_SOURCE -D_REENTRANT -D__COBALT__
> -Wl,@/usr/xenomai/lib/cobalt.wrappers   -L/usr/xenomai/lib -lcobalt
> -lpthread -lrt    -lfuse
>
> Now I am stucked. Any suggestions on what might be happening?
>
>
> On 18 March 2015 at 15:12, Helder Daniel <hdaniel@ualg.pt> wrote:
>
>> Hi
>>
>> I translated the xddp-echo.c example to work with alchemy and rt_tasks
>> rather than posix threads.
>>
>> It was needed to include the header for alchemy tasks: #include
>> <alchemy/task.h> and maintain: <rtdm.h/ipc.h>
>>
>> It was compiled with a simple make file specifying in xeno-config just
>> alchemy skin to get the compilation flags, however when running it gives an
>> error:
>>
>> socket address family not supported by protocol
>>
>> To workaround the makefile was modified to get the compilation flags for
>> both skins (as shown below).
>>
>> But there are any other way of compiling programs that use XDDP real time
>> sockets and alchemy API?
>>
>> For the original version POSIX version xeno-config returns the correct
>> compilation flags specifying rtdm skin or posix skin. It is not needed to
>> specify both.
>>
>> The makefile to get flags for RTDM and Alchemy:
>>
>>
>> https://xenomai.org/documentation/trunk/html/api/xddp-label_8c-example.html
>>
>> the compilation flags to compile it
>>
>> skin1   :=  alchemy
>> skin2   :=  rtdm
>>
>> CFLAGS  := $(shell xeno-config --skin=$(skin1) --cflags)
>> CFLAGS  += $(shell xeno-config --skin=$(skin2) --cflags)
>> LDFLAGS := $(shell xeno-config --skin=$(skin1) --ldflags)
>> LDFLAGS += $(shell xeno-config --skin=$(skin2) --ldflags)
>>
>> $(target): $(target).c
>> $(CC) -o $@ $< $(CFLAGS) $(LDFLAGS)
>>
>>
>>
>> --
>> Helder Daniel
>> UALG - FCT
>> DEEI
>>
>> http://w3.ualg.pt/~hdaniel
>>
>
>
>
> --
> Helder Daniel
> UALG - FCT
> DEEI
>
> http://w3.ualg.pt/~hdaniel
>



-- 
Helder Daniel
UALG - FCT
DEEI

http://w3.ualg.pt/~hdaniel

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Philippe Gerum]

On 03/18/2015 05:07 PM, Helder Daniel wrote:
> I also took a look here:
> 
> http://comments.gmane.org/gmane.linux.real-time.xenomai.users/11767
> 
> I did a: nm -s xddp-echo > symbols
> 
> cat symbols | grep sock
>                  U __wrap_setsockopt
>                  U __wrap_socket
> 
> So the wrappers seems to be applied.
> 

Is CONFIG_XENO_DRIVERS_RTIPC_XDDP enabled in your kernel config?

-- 
Philippe.

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

Yes

CONFIG_XENO_DRIVERS_RTIPC_XDDP=y


On 18 March 2015 at 17:37, Philippe Gerum <rpm@xenomai.org> wrote:

> On 03/18/2015 05:07 PM, Helder Daniel wrote:
> > I also took a look here:
> >
> > http://comments.gmane.org/gmane.linux.real-time.xenomai.users/11767
> >
> > I did a: nm -s xddp-echo > symbols
> >
> > cat symbols | grep sock
> >                  U __wrap_setsockopt
> >                  U __wrap_socket
> >
> > So the wrappers seems to be applied.
> >
>
> Is CONFIG_XENO_DRIVERS_RTIPC_XDDP enabled in your kernel config?
>
> --
> Philippe.
>



-- 
Helder Daniel
UALG - FCT
DEEI

http://w3.ualg.pt/~hdaniel

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

I figure it out.
My mistake. I thought I had xeno_rtipc.ko inserted but it wasn't.

After inserting it start runing again:

insmod /lib/modules/$(uname -r)/kernel/drivers/xenomai/ipc/xeno_rtipc.ko

Sorry.




On 18 March 2015 at 19:04, Helder Daniel <hdaniel@ualg.pt> wrote:

> Yes
>
> CONFIG_XENO_DRIVERS_RTIPC_XDDP=y
>
>
> On 18 March 2015 at 17:37, Philippe Gerum <rpm@xenomai.org> wrote:
>
>> On 03/18/2015 05:07 PM, Helder Daniel wrote:
>> > I also took a look here:
>> >
>> > http://comments.gmane.org/gmane.linux.real-time.xenomai.users/11767
>> >
>> > I did a: nm -s xddp-echo > symbols
>> >
>> > cat symbols | grep sock
>> >                  U __wrap_setsockopt
>> >                  U __wrap_socket
>> >
>> > So the wrappers seems to be applied.
>> >
>>
>> Is CONFIG_XENO_DRIVERS_RTIPC_XDDP enabled in your kernel config?
>>
>> --
>> Philippe.
>>
>
>
>
> --
> Helder Daniel
> UALG - FCT
> DEEI
>
> http://w3.ualg.pt/~hdaniel
>



-- 
Helder Daniel
UALG - FCT
DEEI

http://w3.ualg.pt/~hdaniel

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Philippe Gerum]

On 03/18/2015 04:12 PM, Helder Daniel wrote:
> Hi
> 
> I translated the xddp-echo.c example to work with alchemy and rt_tasks
> rather than posix threads.
> 
> It was needed to include the header for alchemy tasks: #include
> <alchemy/task.h> and maintain: <rtdm.h/ipc.h>
> 
> It was compiled with a simple make file specifying in xeno-config just
> alchemy skin to get the compilation flags, however when running it gives an
> error:
> 
> socket address family not supported by protocol
> 
> To workaround the makefile was modified to get the compilation flags for
> both skins (as shown below).
> 
> But there are any other way of compiling programs that use XDDP real time
> sockets and alchemy API?

XDDP is based on RTDM, so you need POSIX, along with Alchemy for the
changes you added, i.e.:

xeno-config --alchemy --posix --ldflags

> 
> For the original version POSIX version xeno-config returns the correct
> compilation flags specifying rtdm skin or posix skin. It is not needed to
> specify both.
> 
> The makefile to get flags for RTDM and Alchemy:
> 
> https://xenomai.org/documentation/trunk/html/api/xddp-label_8c-example.html
>

Unlike with 2.6.x, mentioning RTDM is pointless with Xenomai 3.x because
you always have POSIX implicitly for any application, therefore you have
RTDM. Giving --skin=rtdm or --rtdm is a no-op for compat purpose with
legacy Makefiles actually.

With 3.x, RTDM implies POSIX I/O calls and the socket interface, which
is readily available with libcobalt, which all apps link against.

-- 
Philippe.

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Helder Daniel]

>
> XDDP is based on RTDM, so you need POSIX, along with Alchemy for the
> changes you added, i.e.:
>
> xeno-config --alchemy --posix --ldflags


ok, thanks


> > For the original version POSIX version xeno-config returns the correct
> > compilation flags specifying rtdm skin or posix skin. It is not needed to
> > specify both.
>
> Unlike with 2.6.x, mentioning RTDM is pointless with Xenomai 3.x because
> you always have POSIX implicitly for any application, therefore you have
> RTDM. Giving --skin=rtdm or --rtdm is a no-op for compat purpose with
> legacy Makefiles actually.
>
> With 3.x, RTDM implies POSIX I/O calls and the socket interface, which
> is readily available with libcobalt, which all apps link against.
>
>
Ok, but it is still needed to specifying both:

xeno-config --alchemy --posix --ldflags

to get the all necessary linking flags, right?

Because if only specified --alchemy program is linked with libcobalt but it
still gives the same error. From the flags returned by xeno-config it seems
that it is required to specify --posix to get the wrappers on posix
functions like socket():

-Wl,@/usr/xenomai/lib/cobalt.wrappers


> xeno-config --alchemy --posix --ldflags
-Wl,@/usr/xenomai/lib/cobalt.wrappers  -lalchemy -Wl,--wrap=main
-Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld -lcopperplate
-L/usr/xenomai/lib -lcobalt -lpthread -lrt    -lfuse

> xeno-config --alchemy --ldflags
-lalchemy -Wl,--wrap=main -Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld
-lcopperplate -L/usr/xenomai/lib -lcobalt -lpthread -lrt    -lfuse

Re: [Xenomai] Makefile to use 2 APIs (rtdm and alchemy) simultaneously

[Philippe Gerum]

On 03/18/2015 09:46 PM, Helder Daniel wrote:
>     XDDP is based on RTDM, so you need POSIX, along with Alchemy for the
>     changes you added, i.e.:
> 
>     xeno-config --alchemy --posix --ldflags
> 
> 
> ok, thanks
>  
> 
>     > For the original version POSIX version xeno-config returns the correct
>     > compilation flags specifying rtdm skin or posix skin. It is not needed to
>     > specify both.
> 
>     Unlike with 2.6.x, mentioning RTDM is pointless with Xenomai 3.x because
>     you always have POSIX implicitly for any application, therefore you have
>     RTDM. Giving --skin=rtdm or --rtdm is a no-op for compat purpose with
>     legacy Makefiles actually.
> 
>     With 3.x, RTDM implies POSIX I/O calls and the socket interface, which
>     is readily available with libcobalt, which all apps link against.
> 
> 
> Ok, but it is still needed to specifying both:
> 
> xeno-config --alchemy --posix --ldflags
> 
> to get the all necessary linking flags, right?
> 

Yes, both for --cflags and --ldflags.

-- 
Philippe.