[Bug driver/70783] -spec option behavior is different to implicit spec file

[andreas.g.jhoss at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70783

--- Comment #2 from Andreas.G.JHOSS <andreas.g.jhoss at gmx dot de> ---
Hmm?
So but how can I add and change implicitely a substitute rule then?
I want to add certain libraries to build process permanently for certain
platforms so I can get platform independent. And clearly I want to add a rule
where I can disable this libararies explicitely. I thought this is far common
how I do this.

Must the user always state --spec to override/add a single substitue rule in
gcc?