message: build with -fstack-reuse=none
  Github-Pull:
  Rebased-From:
diff: @@ -725,6 +725,10 @@ if test x$TARGET_OS != xwindows; then
  AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
  fi
  +# All versions of gcc that we commonly use for building are subject to bug
  +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
  +# -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
  +AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"])
  if test x$use_hardening != xno; then
  use_hardening=yes
  AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])
  