[Dune] Problem with latest dune-common / strangy error message with quadmath.hh

Benedikt Oswald benedikt.oswald at aquante.ch
Mon Dec 8 18:48:49 CET 2025


Dear Dune,

using the latest dune git versions, I encounter this error:

----------------------

/Users/oswald/gitwork-demokritos3d/demokritos3d/demokritos3d-dune-bleeding-edge/dune-common/dune/common/quadmath.hh: 
At global scope:
/Users/oswald/gitwork-demokritos3d/demokritos3d/demokritos3d-dune-bleeding-edge/dune-common/dune/common/quadmath.hh:318:21: 
error: expected initializer before '&' token
   318 |     inline Float128 fma(const Float128& t, const Float128& u, 
const Float128& v)
--------------


Now, I have another code which uses quadrature & compiles well & even 
links, which rather suggests this is my fault.


I use:

Mac OS X, 15.7.1 (24G231)

gcc 15.1

and this gcc flag: -fext-numeric-literals


But still, if you have a suggestion, I am grateful,

thanks & greetings, Benedikt




            LSPR AG
            Dr. sc. techn. Benedikt Oswald
            Founder, CTO
            
Kriesbachstrasse 3b
            CH 8304 Wallisellen
            
+41 43 366 90 74
            benedikt.oswald at lspr.swiss
            www.lspr.swiss <https://lspr.swiss>


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