Building for target mips2_fp_le possible?

Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Hi,

I have two questions:


1. When running ./config.sub mips, I only get the target "mips-unknown-elf".

Is there a possibility to compile for mips2_fp_le?  Can mips-unknown-elf 
be used for that?

2. Is it possible to build for a Windows host and a Linux target?  I 
would like to know if I can run Insight on a Win32 platform and using it 
to debug an embedded Linux system.


-- 
*Best rgds,

Geert
*

Re: Building for target mips2_fp_le possible?

[Keith Seitz]

Geert Vancompernolle wrote:

> 1. When running ./config.sub mips, I only get the target 
> "mips-unknown-elf".
> 
> Is there a possibility to compile for mips2_fp_le?  Can mips-unknown-elf 
> be used for that?

Good question -- I don't know! You should ask on the gdb@ list if gdb 
can be configured for your target. [Insight is the gui on top of gdb: if 
gdb can debug it, Insight should also be able to.]

> 2. Is it possible to build for a Windows host and a Linux target?  I 
> would like to know if I can run Insight on a Win32 platform and using it 
> to debug an embedded Linux system.

While I've never tried it, I would guess that it is possible. Again, 
your best bet is to ask the gdb folks. I haven't built/used anything but 
linux native for a long time (occasionally cygwin native).

Keith

Re: Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Keith Seitz wrote:
> Geert Vancompernolle wrote:
>
>> 1. When running ./config.sub mips, I only get the target 
>> "mips-unknown-elf".
>>
>> Is there a possibility to compile for mips2_fp_le?  Can 
>> mips-unknown-elf be used for that?
>
> Good question -- I don't know! You should ask on the gdb@ list if gdb 
> can be configured for your target. [Insight is the gui on top of gdb: 
> if gdb can debug it, Insight should also be able to.]
>
>> 2. Is it possible to build for a Windows host and a Linux target?  I 
>> would like to know if I can run Insight on a Win32 platform and using 
>> it to debug an embedded Linux system.
>
> While I've never tried it, I would guess that it is possible. Again, 
> your best bet is to ask the gdb folks. I haven't built/used anything 
> but linux native for a long time (occasionally cygwin native).
>
> Keith
>
>

In the mean time, I've asked for help on the GBD list.  There, I came to 
know that there are more targets available then what "./config.sub" 
suggests.

In my very situation, I ran the command "./config.sub mips" and I "only" 
got mips-unknown-elf as feedback.  But there is also mips-linux and so on.

So, my question is now: why is ./config.sub not giving me all 
possibilities when I give "mips" as a part of the target string?  What 
exactly can I expect when running ./config.sub?

Best rgds,

-- Geert

Re: Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Keith Seitz wrote:
> Geert Vancompernolle wrote:
>
>> 1. When running ./config.sub mips, I only get the target 
>> "mips-unknown-elf".
>>
>> Is there a possibility to compile for mips2_fp_le?  Can 
>> mips-unknown-elf be used for that?
>
> Good question -- I don't know! You should ask on the gdb@ list if gdb 
> can be configured for your target. [Insight is the gui on top of gdb: 
> if gdb can debug it, Insight should also be able to.]
>
>> 2. Is it possible to build for a Windows host and a Linux target?  I 
>> would like to know if I can run Insight on a Win32 platform and using 
>> it to debug an embedded Linux system.
>
> While I've never tried it, I would guess that it is possible. Again, 
> your best bet is to ask the gdb folks. I haven't built/used anything 
> but linux native for a long time (occasionally cygwin native).
>
> Keith
>
>
Well, I (think I) finally figured out how to proceed with that config.sub.

In my very case, I want to compile Insight for PC as host and 
mips2_fp_le as target.  The only thing which is important, is that the 
configuration file must be able to find the compilers for the target given.

So, what I did was the following:

* I added the following section into the config.sub file (in the "case 
$basic_machine in" section):

    mips2_fp_le)
        basic_machine=$basic_machine-unknown
        os=-linux
        ;;

   I added it just after the following lines:

    mips3*)
        basic_machine=`echo $basic_machine | sed -e 
's/mips3/mips64/'`-unknown
        ;;

* This will result in searching for "mips2_fp_le-gcc", 
"mips2_fp_le-g++", and so on during the run of "./configure 
--target=mips2_fp_le"

* The only thing that is important, is that ./configure can find the 
compilers for the target given.  So, ./configure must be able to fine 
"mips2_fp_le-gcc", "mips2_fp_le-g++", and so on, to be able to compile 
gdb for the target.
   Therefore, it's best to make sure the path is extended to the 
location where ./configure is supposed to find all the executables for 
that target.

* Once this is done, I should have the Insight GUI running on the PC, 
while the gdb should have been compiled for the mips2_fp_le target.

I still have to test it, though (I'm at home and the set-up is at the 
office), but I will come back with the results of this "experiment".


-- 
Best rgds,

-- Geert

Re: Building for target mips2_fp_le possible?

[Maciej W. Rozycki]

On Sat, 10 May 2008, Geert Vancompernolle wrote:

> * The only thing that is important, is that ./configure can find the 
> compilers for the target given.  So, ./configure must be able to fine 
> "mips2_fp_le-gcc", "mips2_fp_le-g++", and so on, to be able to compile 
> gdb for the target.

 Hmm, out of curiosity, because you seem quite committed to this -- where
have you come with this "mips2_fp_le" target from?  I have worked with
MIPS architecture processors for many years and never seen any of them
being referred to like this.

  Maciej

Re: Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Maciej W. Rozycki wrote:
> Hmm, out of curiosity, because you seem quite committed to this -- where
> have you come with this "mips2_fp_le" target from?  I have worked with
> MIPS architecture processors for many years and never seen any of them
> being referred to like this.
>
>   Maciej
Hmm... Curiosity killed the cat!!!  ;-)

Well, we're using a mips2_fp_le target to run our Philips High End 
televisions. 

I'm currently looking for an easy way to debug this target, using 
RemoteTCP.  Normally, we're using a tool chain from MontaVista, build 
around DevRocket, to debug our user space application, but this is too 
heavy for the project I have in mind.

All should fit on a USB stick and should be very easy and fast to 
install.  Mainly to debug "in the field".

-- 
Best rgds,

-- Geert

Re: Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Maciej W. Rozycki wrote:
> Hmm, out of curiosity, because you seem quite committed to this -- where
> have you come with this "mips2_fp_le" target from?  I have worked with
> MIPS architecture processors for many years and never seen any of them
> being referred to like this.
>
>   Maciej
Hmm... Curiosity killed the cat!!!  ;-)

Well, we're using a mips2_fp_le target to run our Philips High End 
televisions. 

I'm currently looking for an easy way to debug this target, using 
RemoteTCP.  Normally, we're using a tool chain from MontaVista, build 
around DevRocket, to debug our user space application, but this is too 
heavy for the project I have in mind.

All should fit on a USB stick and should be very easy and fast to 
install.  Mainly to debug "in the field".

-- 
*Best rgds,

--Geert
____________________________________

     In commemoration of my beloved Parents...
        http://ouders.gevawebsolutions.com
____________________________________*

Re: Building for target mips2_fp_le possible?

[Maciej W. Rozycki]

On Sat, 10 May 2008, Geert Vancompernolle wrote:

> Hmm... Curiosity killed the cat!!!  ;-)

 Well, no cats around so everyone should feel safe. :-)

> Well, we're using a mips2_fp_le target to run our Philips High End 
> televisions. 

 I have just been wondering who has come up with this name -- they must
have patches for all the relevant pieces of software too.

  Maciej

Re: Building for target mips2_fp_le possible?

[Geert Vancompernolle]

Maciej W. Rozycki wrote:
> I have just been wondering who has come up with this name -- they must
> have patches for all the relevant pieces of software too.
>
>   Maciej
My guess is that MontaVista has "invented" that name.  It's a 
composition of the Mips2 4kec core 
(http://www.mips.com/products/cores/32-bit-cores/mips32-4ke/, the 2 
comes from 32 bits iso 16 bits, I guess), with floating point arithmetic 
(hence, fp) and it's a little endian set-up (hence, le).

So, putting this stuff all together, is giving you 'mips2_fp_le'...


-- 
Best rgds,

-- Geert