https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92860
--- Comment #61 from David Binderman <dcb314 at hotmail dot com> --- Created attachment 51964 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51964&action=edit C source code Command line used to compile file: /home/dcb/gcc/working.2/./gcc/xgcc -B/home/dcb/gcc/working.2/./gcc/ -B/home/dcb/gcc/results.20211209/x86_64-pc-linux-gnu/bin/ -B/home/dcb/gcc/results.20211209/x86_64-pc-linux-gnu/lib/ -isystem /home/dcb/gcc/results.20211209/x86_64-pc-linux-gnu/include -isystem /home/dcb/gcc/results.20211209/x86_64-pc-linux-gnu/sys-include -fchecking=1 -g -O3 -march=native -O2 -g -O3 -march=native -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wstrict-prototypes -Wmissing-prototypes -Wno-error=format-diag -Wold-style-definition -isystem ./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -I. -I. -I../.././gcc -I../../../trunk.git/libgcc -I../../../trunk.git/libgcc/. -I../../../trunk.git/libgcc/../gcc -I../../../trunk.git/libgcc/../include -I../../../trunk.git/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS -o unwind-dw2.o -MT unwind-dw2.o -MD -MP -MF unwind-dw2.dep -fexceptions -c ../../../trunk.git/libgcc/unwind-dw2.c -fvisibility=hidden -DHIDE_EXPORTS