RISC-V: GCC crti.S vs. Newlib __libc_init_array()

[Sebastian Huber]

On 26/07/18 01:41, Joel Sherrill wrote:
>
>
> On Wed, Jul 25, 2018 at 5:02 AM, Sebastian Huber 
> <sebastian.huber@embedded-brains.de 
> <mailto:sebastian.huber@embedded-brains.de>> wrote:
>
>     Hello,
>
>     the GCC provided libgcc/config/riscv/crti.S and
>     libgcc/config/riscv/crtn.S files are empty on RISC-V, e.g. they
>     contain no definitions of _init and _fini. This leads to undefined
>     references in Newlib provided __libc_init_array() and
>     __libc_fini_array(). I would like to fix this. Should this be done
>     via some configure test or a __riscv machine define in
>     newlib/libc/misc/init.c and newlib/libc/misc/fini.c?
>
>
> I would lean to a __riscv define in newlib/libc/misc/init.c and fini.c.
>
> But if they need these, why aren't they in gcc? This seems to be covering
> up a gcc issue that would impact non-RTEMS targets.

I think this impacts all Newlib RISC-V users. The _init and _fini are 
NOT needed. See also comment here:

https://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/riscv/crti.S?revision=245226&view=markup
https://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/riscv/crtn.S?revision=245226&view=markup

-- 
Sebastian Huber, embedded brains GmbH

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