[PATCH] build: Use -frandom-seed=0

[Sebastian Huber]

On 29.02.24 00:29, Chris Johns wrote:
> On 28/2/2024 6:24 pm, Sebastian Huber wrote:
>> On 28.02.24 06:34, Chris Johns wrote:
>>> The manual says:
>>>
>>>     The string can either be a number (decimal, octal or hex) or
>>>     an arbitrary string (in which case it’s converted to a number by
>>>     computing CRC32).
>>>
>>>     The string should be different for every file you compile.
>>>
>>> I take this to mean the option `-frandom-seed=0` uses `0` as a number however it
>>> is the same for every file and the manual clearly says it must be different?
>> Using -frandom-seed=0 seems to be quite common on the internet. The random seed
>> is rarely used in GCC. The only use case in RTEMS I found is related to the gcov
>> code coverage instrumentation.
> There are lots of things that are common on the internet I ignore 😉
> 
> Is this a bug in the documentation?

 From my point of view this random seed is a gray area in the compiler. 
The cases in which it is used should not matter for the RTEMS build 
(except for the code coverage):

https://gcc.gnu.org/pipermail/gcc-help/2024-February/143324.html

I will try to add it only to the coverage flags.

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