Still no luck on Solaris 11.3/sparc

[john o goyo]

Greetings, Gaius.

I am trying to build gm2 from the git repository.  My latest woe is the 
following.

libtool: compile:  /home/build/opt/gm2/bld/gm2-sol11/./gcc/gm2 
-B/home/build/opt/gm2/bld/gm2-sol11/./gcc/ -c -g -O2 -g -O2 
-I../libm2pim -I/home/build/opt/gm2/src/gcc-git/gcc/m2/gm2-libs-pim 
-I/home/build/opt/gm2/src/gcc-git/gcc/m2/gm2-libs 
-I/home/build/opt/gm2/src/gcc-git/gcc/m2/gm2-libs-iso 
../../../../../src/gcc-git/libgm2/libm2log/../../gcc/m2/gm2-libs-pim/BitBlockOps.mod 
-fPIC -DPIC -o .libs/BitBlockOps.o
cc1gm2: error: plugin support is disabled; configure with "--enable-plugin"
cc1gm2: error: plugin support is disabled; configure with "--enable-plugin"

Why would plugin support -- whatever that may be -- be disabled?  (I 
disabled LTO because it was broken.)

Here is my configuration script.

NM=/usr/bin/gnm \
SHELL=/usr/bin/bash \
AR=/usr/bin/ar \
CC=/home/build/gcc/9.3.0/bin/gcc \
CXX=/home/build/gcc/9.3.0/bin/g++ \
../../src/gcc-git/configure \
--prefix=$HOME/gm2/sol11 \
--exec-prefix=$HOME/gm2/sol11 \
--enable-languages=c,c++,m2 \
--with-mpc=/usr/local \
--with-gmp=/usr/local \
--with-mpfr=/usr/local \
--disable-bootstrap \
--enable-threads=posix \
--disable-lto

john