[Bug target/88535] sparcv9 gcc 7 causes comparison failure in sparc gcc 8 dwarf2out.o

[mailboxnotfound at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88535

--- Comment #9 from john henning <mailboxnotfound at yahoo dot com> ---
Eric, thank you for the explicit advice, although I note that both your
examples say '--build=something'.  

Is that switch similar to or different from the switch '--target=something',
which http://gcc.gnu.org/install/configure.html discourages from use?  

It says: "GCC has code to correctly determine the correct value for target for
nearly all native systems. Therefore, we highly recommend you do not provide a
configure target when configuring a native compiler." 

That is, would you expect it would work to just say:
   CC="gcc -m32" CXX="g++ -m32" ./configure
and
   CC="gcc -m64" CXX="g++ -m64" ./configure