Re: Work on newlib

[Gedare Bloom <gedare@rtems.org>]

On Tue, May 16, 2017 at 2:56 AM, aditya upadhyay <aadit0402@gmail.com> wrote:
> Hello Developers,
>
> I am Aditya Upadhyay got selected in Google Summer of Code(2017) for RTEMS
> organization. My Proposal has been accepted for POSIX Compliance, Where I
> have to work on newlib and some libraries that is not in RTEMS, have to
> implement.
>
> I am having a j-newlib script pointed by Joel Sherrill, I have used this
> script using following command :
>  aditya@aditya-Lenovo-ideapad-110-15ACL:~/development/newlib$ ./j-newlib
> These are the targets in j-newlib :
>  # primary targets
>   TARGETS="${TARGETS} sparc-rtems4.12"
>   TARGETS="${TARGETS} arm-rtems4.12"
>   TARGETS="${TARGETS} powerpc-rtems4.12"
>   TARGETS="${TARGETS} mips-rtems4.12"
>   TARGETS="${TARGETS} i386-rtems4.12"
>   TARGETS="${TARGETS} m68k-rtems4.12"
>
> There are some secondary and optimistic targets.
>
> and generated directory like b-sparc64-rtems4.12-newlib,
> b-sparc-rtems4.12-newlib, b-arm-rtems4.12-newlib etc..but there is not a
> single .exe file after i fired make command.
>
> I do not know whether i am going in right working direction or not ?
> Please correct me. Any direction or suggestion will be greatly appreciable.
>
Without knowing what this j-newlib script does, it is hard to help you
interpret the output. Perhaps Joel can help you. For RTEMS, you should
compile newlib as part of building gcc. This means if you have
modified newlib you should re-compile gcc with it, and then you would
re-compile RTEMS and run its testsuite in order to test your changes.

To compile a modified newlib into the gcc toolchain, you should
consider creating a patch of your change to newlib (e.g. from
git-format-patch) and add the patch to your local rtems-source-builder
in order to apply a custom patch during the compiler re-build. See
https://docs.rtems.org/branches/master/rsb.html#patches for some
documentation on how you do this, which includes an example
specifically related to patching newlib.

Gedare

> Thanks & Best Regards,
> Aditya Upadhyay