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Subject: Re: Importing cacoshl.c and its dependent methos,
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From: Craig Howland <howland@LGSInnovations.com>
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Date: Wed, 21 Jun 2017 15:18:00 -0000
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On 06/21/2017 11:09 AM, Joel Sherrill wrote:
>
>
> On 6/21/2017 10:02 AM, Craig Howland wrote:
>> Wait.  Isn't stdbool.h available in gcc for ages?  When building newlib,
>>>> shouldn't we be able to rely on c99 being available?
>>>>
>>>>
>>>> Corinna
>>>>
>> Yes, we can, and should.  That's because complex.h and stdbool.h were added in
>> C99, making C99 required for these functions.  I did a quick check on some older
>> cross-compiler installs that I have, and GCC 4.1.1 has stdbool.h (and 4.6.4 has
>> complex.h).
>
> Just to clarify, I did a test and added include <stdbool.h> to printf.c.
> It worked and picked up the gcc version. Can we rely on this being present
> or does newlib need to have its own?
>
> I want to make sure the direction is quite clear. :)
>
> --joel
We can rely on it being present in GCC.  (stdbool.h is required in all 
implementations, unlike some headers which are only required in hosted 
implementations.)  I just checked and 4.1.1 is from about May 2006, so it's been 
present at least 11 years.