gm2-11.1.0-20210503 builds on NetBSD 9.1-sparc64

[john o goyo]

Gm2-20210503 built on NetBSD 9.1-sparc64.

------------------
 [~]=> uname -a
NetBSD [...] 9.1 NetBSD 9.1 (GENERIC) #0: Sun Oct 18 19:24:30 UTC 2020 
mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/sparc64/compile/GENERIC sparc64


 ------------------
[~]=> cat bld/configure-gm2-11.1.0
#!/usr/pkg/bin/bash
# $Revision: 1.5 $
#
GM2DATE=20210503
GCCVER=11.1.0

rm -rf gm2-$GCCVER-$GM2DATE
mkdir gm2-$GCCVER-$GM2DATE
cd gm2-$GCCVER-$GM2DATE

CONFIG_SHELL=/usr/pkg/bin/bash \
../../src/gcc-$GCCVER+gm2-$GM2DATE/configure \
--prefix=$HOME/gm2/$GCCVER/$GM2DATE \
--with-mpc-include=/usr/pkg/include \
--with-mpc-lib=/usr/pkg/lib \
--with-gmp-include=/usr/pkg/include \
--with-gmp-lib=/usr/pkg/lib \
--enable-languages=c,c++,m2 \
--disable-bootstrap --enable-checking \
--enable-shared --disable-libitm \
--enable-threads=posix

echo
echo "Run export LD_LIBRARY_PATH=/usr/pkg/lib:/usr/local/lib"
echo
------------------

                === gm2 Summary ===

# of expected passes            8278
# of unexpected failures        3817
# of unresolved testcases       359
------------------

Several GNU packages were needed (such as bash, gmake, others) and some 
accomodations for building on NetBSD as opposed to Linux.  One 
interesting note is that gcc-11.1.0 builds concurrently (using gmake 
-j4) but gm2-11.1.0 does not.

Unlike the Solaris 10/sparc attempted builds post gcc-4.1.2, ShiftLeft() 
generated correct code.  No easy investigation possible as gcc stopped 
supporting Solaris 10/sparc at 10+ and only started supporting NetBSD 
"out of the box" at 10+.  (My Solaris 11/sparc box is in storage still, 
awaiting other tasks of higher priority.)

So Kudos to Gaius (and thanks to Brian for noting the unpatched tarballs).

Sincerely,
john