The problem seems to be gone, I checked on Solaris 11.4/i86, 64bit ABI.
Oh rats, the problem is gone on /i86, but still present on /sparc. As I build both platforms from the same source tree, this is bad...
-- Jörn Clausen BITS - Bielefelder IT-Servicezentrum https://www.uni-bielefeld.de/bits