How can I use the GCC -frandom-seed=<file name> option with the waf build system?

[Sebastian Huber]

On 23/09/2022 20:27, Joel Sherrill wrote:
> 
> 
> On Fri, Sep 23, 2022 at 11:49 AM Sebastian Huber 
> <sebastian.huber at embedded-brains.de 
> <mailto:sebastian.huber at embedded-brains.de>> wrote:
> 
>     On 23/09/2022 18:47, Karel Gardas wrote:
>      > On 9/23/22 18:35, Sebastian Huber wrote:
>      >> Hello,
>      >>
>      >> I have a question for the waf experts. How can I use the GCC
>      >> -frandom-seed=<file name> option with the waf build system?
>      >>
>      >>
>     https://stackoverflow.com/questions/73829827/how-can-i-use-the-gcc-frandom-seed-file-name-option-with-the-waf-build-system <https://stackoverflow.com/questions/73829827/how-can-i-use-the-gcc-frandom-seed-file-name-option-with-the-waf-build-system>
>      >
>      > Unix? Why not to use pure and simple -frandom-seed=$RANDOM ? E.g.
>     I hope
>      > you'd like to have something there hence went for file name which
>     will
>      > give you stable "random" value per every file compiled while $RANDOM
>      > will give you more randomness and certainly not the same value
>     per same
>      > file...
> 
>     I would like to have a reproducible build, so I don't want something
>     which varies across builds.
> 
> 
> Why not just pass in a constant? You need it to be the same so waf
> reacts the same.

The GCC documentation says:

The string should be different for every file you compile.

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