Need help with gcc c++ issue

[Ralf Corsepius]

On 02/16/2015 11:33 PM, Kevin Kofler wrote:
> Ralf Corsepius wrote:
>> - A GCC-5 was pushed to F22 (I thought FESCO had decided _not_ to push
>> GCC-5 to F22) and already is causing FTBFSes there[1]
>
> They decided to push GCC 5 to F22, but with the GCC 4 C++ ABI as the default
> C++ ABI to avoid having to rebuild everything C++ this late in the cycle.
IMO, this was a bad and non-helpful decision. They should not have 
pushed any GCC-5 "this late in the cycle" and should have waited with 
pushing GCC-5 to rawhide until F22 is release.

Right now, we are facing packages whose (non-gcc related) F22-bugs are 
unfixable because the issues w/ GCC-5 F23 are propagating through.

> Other GCC 5 changes can still cause breakage though.
Exactly.

I already am facing a couple of F22 packages which GCC 5 broke, because

- the implicit default c-standard seems to have changed. I am facing 
packages to whom I now have to add -std=c89 or -std=gnu89 to let 
building succeed.

[BTW: One family of packages which is victim of this change is GCC-4,x 
itself. Older versions seem to require -std=gnu89]

- the GCC version numbers have changed, which is causing FTBFSes in 
poorly implemented packages which somewhere depend on hard-coded GCC 
version numbers.

Ralf