the mystery of math.h in lib/gcc/%triple-name%/%gcc-version%/include-fixed

[Dennis Clarke]

On 10/24/2018 11:05 AM, Jonathan Wakely wrote:
> On Wed, 24 Oct 2018 at 16:02, Dennis Clarke <dclarke@blastwave.org> wrote:
>>
>> On 10/24/2018 05:04 AM, Jonathan Wakely wrote:
>>> On Wed, 24 Oct 2018 at 09:53, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>>>>
>>>> On Wed, 24 Oct 2018 at 04:25, Dennis Clarke <dclarke@blastwave.org> wrote:
>>>>> The question has to be where do these "include-fixed" headers come
>>>>> from?
>>>>
>>>> The include-fixed headers are generated as part of the GCC build
>>>> process. The contents of the fixincludes dir in the GCC sources apply
>>>> a set of rules to fix known problems in the system headers (either
>>>> conformance bugs, or incompatibilities with GCC).
>>>
>>> This is (barely) documented at
>>> https://gcc.gnu.org/onlinedocs/gccint/Headers.html
>>>
>>
>> OKay .. maybe I can write something ( anything ) with examples but my
>> test case examples are Debian on ppc64 and Solaris on sparc as well as
>> FreeBSD on x86_64.  Something somewhere that says certain C++ standards
>> are expected ... or not ... I have yet to figure it out here.
> 
> I don't understand what you're saying. Are you asking for something?
> 

I am saying that page can be updated a bit with some more explanation
  and examples and such and I could write up something.

Dennis