How to reduce the RTEMS BSP build time

[Amarnath MB]

Hi,

As I stated in my earlier mail, I'm trying to move my development to master
branch.
I have made following changes in the RTEMS git clone,

   1. Created a new folder <target> for my target inside /bsps/arm/
   2. Added .inc and .cfg files for the target inside
   /bsps/arm/<target>/config (Modified copy of lpc32xx)
   3. Added linkcmds.<target> file inside  /bsps/arm/<target>/start
   (Modified copy of lpc32xx)
   4. Created a new folder <target> inside /c/src/lib/libbsp/arm/
   5. Added configure.ac and Makefile.am inside
   /c/src/lib/libbsp/arm/<target>/ (Modified copy of lpc32xx)

make command after bootstrapping gave me following error,
checking for RTEMS_BSP... mytarget
checking for perl... /usr/bin/perl
configure: error: Invalid BSP
configure: error:
../../../../../.././../../rtems-git/c/src/lib/libbsp/arm/configure failed
for lib/libbsp/arm
Makefile:731: recipe for target 'mytarget' failed
gmake[2]: *** [mytarget] Error 1
gmake[2]: Leaving directory
'/mnt/OS/LAP000426/RTEMS_BUILD/development/rtems/mytarget
/rtems/5.00/build/LPC/arm-rtems5/c'
Makefile:289: recipe for target 'all-recursive' failed
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory
'/mnt/OS/LAP000426/RTEMS_BUILD/development/rtems/mytarget/rtems/5.00/build/LPC/arm-rtems5/c'
Makefile:410: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1

Am I doing something wrong here or missing some additional steps?

*Thank you & Regards,*
*Amarnath MB*



On Mon, Dec 10, 2018 at 2:34 PM Amarnath MB <
amarnath.mb at mistralsolutions.com> wrote:

> Hi Jeol,
>
> I was doing bootstrap in the top of the tree, Thanks for your tip.
>
> As per  Sebastian Huber suggested I'm moving my development to master
> branch.
> In RTEMS 5, after adding some changes in the start.S file if I give
> successive make as 'make RTEMS_BSP=lpc32xx_mzx',
> the changes are getting reflected in the hello.exe sample. I don't need to
> give a clean before each make.
>
> I have one more doubt, is there a way to build only specific samples from
> /testsuites/samples?
>
> *Thank you & Regards,*
> *Amarnath MB*
>
>
>
> On Fri, Dec 7, 2018 at 6:44 PM Joel Sherrill <joel at rtems.org> wrote:
>
>>
>>
>> On Fri, Dec 7, 2018, 12:36 AM Amarnath MB <
>> amarnath.mb at mistralsolutions.com wrote:
>>
>>> Hi,
>>>
>>> I am a noob to RTEMS. Currently working on developing an RTEMS 4.11 BSP for
>>> a new SOC based on ARM926EJS.
>>> I have taken lpc32xx_mzx as the reference BSP and I was able to
>>> successfully build the BSP in Ubuntu 16.04 using the steps in
>>> RTEMS user manual.
>>> Below is the time taken for completing each step in BSP building:
>>> 1. bootstrapping takes 20 mins,
>>> 2. configuring takes 3 mins
>>> 3. make takes 18 mins
>>> 4. install takes 4 mins
>>>
>>
>> You are developing a bsp so you may be able to take some shortcuts.
>>
>> First only build the samples. There is no point in build 500+ tests until
>> you pass hello, ticker, etc.
>>
>> If you change a BSP Makefile.am or configure.ac, bootstrap from that
>> directory not the top of the tree.
>>
>> Configure with --enable- maintainer-mode which accounts for dependencies
>> from changing configure or Makefiles.
>>
>> If you are on a VM, give it more cores and use the option to limit the VM
>> from using 100% of the CPU time. The base OS will need some cycles but not
>> half the cores worth while you are using the VM.
>>
>> Give the VM at least 2GB if you have enough RAM to do that. 4 if you have
>> 8GB or more.
>>
>>
>>
>>> When I give a make after adding some changes in the start.S file, the
>>> changes are not reflected in the hello.exe sample.
>>> I need to give a clean and then a make to have the changes reflect in
>>> the hello.exe, as a result, each make takes 18 mins
>>> which is very huge compared to other builds like u-boot.
>>>
>>
>> From the build tree:
>>
>> find . -name *.exe | xargs -e rm
>> make
>>
>> Redirecting make to a log file helps and -j helps
>>
>> I think this bug if fixed on the master
>>
>>>
>>> Is there a way that I can reduce this build time?
>>> Thanks in advance for all your support.
>>>
>>> *Thank you & Regards,*
>>> *Amarnath M B *
>>> _______________________________________________
>>> users mailing list
>>> users at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/users
>>
>>
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