https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88953
--- Comment #5 from Jan Kossmann <Jan.Kossmann at hpi dot de> --- You are right, I verified with: gcc version 9.0.0 20190122 (experimental) (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-o' 'test.cpp.o' '-shared-libgcc' '-march=z13' '-mno-htm' '-mzarch' '-m64' gcc/bin/../libexec/gcc/s390x-ibm-linux-gnu/9.0.0/cc1plus -E -quiet -v -imultiarch s390x-linux-gnu -iprefix gcc/bin/../lib/gcc/s390x-ibm-linux-gnu/9.0.0/ -D_GNU_SOURCE test.cpp -march=z13 -mno-htm -mzarch -m64 -O3 -fpch-preprocess -o test.ii and it worked out fine. Sorry for the trouble, thanks for your help!
