[TriEmbed] TriEmbed Digest, Vol 36, Issue 4

[Pete Soper]

OK, I dug for a minute and found this:

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0475c/BAJFHFDI.html

If we click on the right side-middle link "ISO C Features missing from 
microlib" the list is available. If " |#pragma import(__use_full_stdio)" 
|is used then full FILE* support is available except for  feof() and 
ferror().

Seems like you just got very unlucky needing feof. The floating point 
compromises could also be a major pain, but the other stuff seems pretty 
minor (e.g. what would we expect to get out of a call to system or getenv?)

But it's good to know that "mbed compatible" does not imply "uniform ISO 
C support". Please keep us posted on whether the Kinetis board

About the "setting up a GNU toolchain". On Linux this is about as easy 
as anything could get,and the mbed project export mechanism dove tails 
with these tools beautifully.

-Pete


On 05/04/2016 01:31 PM, Alex Davis via TriEmbed wrote:
>> I'm curious what this means as well.
>>
>> The Nucleo boards use Cortex-M[2,3,4,7] devices for which there is
>> plenty of support for in gcc ARM toolchains, as well as IAR, Keil, etc..
>>
>> By "ARM C", do you mean Keil, which is owned by the ARM company? If so
>> that should be supported as well.
> Here's an example from developer.mbed.org:
> https://developer.mbed.org/questions/3895/Compile-for-Nucleo-L053r8/
>
> Someone's trying compile something that uses the SDFileSystem library.
> They get an error on 'feof' (which is used to know when you reach EOF in
> a file). This is the answer from MBED:
> "I believe the application is for targets which use ARM C library, which
> many nucleo does not support currently. They use uARM which implements
> only subset of C library, therefore some functions are not available.
> There's reference on ARM info pages , what is stripped."
>
> So, that sucks. Wish they'd listed that somewhere on the MBED site. To
> me, being able to use libraries is a great value, as is the MBED
> paradigm, where so long as I can log on and plug in the board, I can
> write code and test code. If I have to set up a GNU toolchain I'll
> probably never get around to doing anything on it.
>

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