Re: [PATCH] Remove multiple defination error

[Sebastian Huber <sebastian.huber@embedded-brains.de>]

On 11/07/2020 19:18, Eshan Dhawan wrote:
> 
> 
> On Sat, Jul 11, 2020 at 8:46 PM Sebastian Huber 
> <sebastian.huber@embedded-brains.de 
> <mailto:sebastian.huber@embedded-brains.de>> wrote:
> 
>     On 11/07/2020 00:41, Eshan dhawan wrote:
> 
>      > Signed-off-by: Eshan dhawan<eshandhawan51@gmail.com
>     <mailto:eshandhawan51@gmail.com>>
>      > ---
>      >   newlib/libm/machine/arm/fenv-vfp.c |  7 ++++-
>      >   newlib/libm/machine/arm/fenv.c     | 47
>     +++++++++++++++++++-----------
>      >   2 files changed, 36 insertions(+), 18 deletions(-)
> 
>     What are the design goals of this implementation? Should it work with
>     some sort of run time VFP detection? Should it select the support using
>     builtin defines?
> 
> It used the GCC flags to detect VPF
> if VPF is not selected all the symbols of vfp won't appear :)
> 
> 
>     I would use builtin defines only and then just use a single file.
> 
> I tried converting into a single file but the file becomes too complex 
> to handle and check for errors. :)

Complexity is always a bit subjective.

How did you test the ARM implementation? I doubt the soft-float support 
works at all. FreeBSD ships its own soft-float library. Newlib uses the 
one from libgcc by default. They are not compatible.

I guess the MIPS soft-float fenv support has this issue as well.

Having an GCC incompatible soft-float fenv support in Newlib makes no 
sense to me. How can we fix this? Disable it completely or return some 
run time errors?

Maybe we should remove the ARM fenv support from Newlib until these 
issues are fixed and a working implementation is available.

-- 
Sebastian Huber, embedded brains GmbH

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