The attached patch copies the existing 
libstdc++-v3/config/abi/post/s390-linux-gnu/baseline_symbols.txt
to .../s390x-linux-gnu/32/baseline_symbols.txt.  This fixes the
abi test failure on s390x with -m31.

The patch is gzip'ed because it's large.

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany