bopm compiling error

OS: gentoo amd 64bit  install
Compiler: gcc 4.1.1
kernel : 2.6.16.19


Bopm version 3.1.2


error:

$ make
Making all in src
make[1]: Entering directory `/home/irc/bopm-3.1.2/src'
make  all-recursive
make[2]: Entering directory `/home/irc/bopm-3.1.2/src'
Making all in libopm
make[3]: Entering directory `/home/irc/bopm-3.1.2/src/libopm'
Making all in src
make[4]: Entering directory `/home/irc/bopm-3.1.2/src/libopm/src'
make  all-am
make[5]: Entering directory `/home/irc/bopm-3.1.2/src/libopm/src'
source='compat.c' object='compat.lo' libtool=yes \
         depfile='.deps/compat.Plo' tmpdepfile='.deps/compat.TPlo' \
         depmode=gcc3 /bin/sh ../depcomp \
         /bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. 
-I.     -g -O2 -c -o compat.lo `test -f 'compat.c' 

  || echo './'`compat.c
mkdir .libs
gcc -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -c compat.c -MT compat.lo -MD -MP 
-MF .deps/compat.TPlo  -fPIC -DPIC -o .libs/com 

pat.lo
gcc -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -c compat.c -MT compat.lo -MD -MP 
-MF .deps/compat.TPlo -o compat.o >/dev/null 2> 

&1
mv -f .libs/compat.lo compat.lo
source='config.c' object='config.lo' libtool=yes \
         depfile='.deps/config.Plo' tmpdepfile='.deps/config.TPlo' \
         depmode=gcc3 /bin/sh ../depcomp \
         /bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. 
-I.     -g -O2 -c -o config.lo `test -f 'config.c' 

  || echo './'`config.c
rm -f .libs/config.lo
gcc -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -c config.c -MT config.lo -MD -MP 
-MF .deps/config.TPlo  -fPIC -DPIC -o .libs/con 

fig.lo
config.c: In function 'libopm_config_create':
config.c:93: error: invalid lvalue in assignment
config.c:97: error: invalid lvalue in assignment
config.c:102: error: invalid lvalue in assignment
config.c: In function 'libopm_config_set':
config.c:191: error: invalid lvalue in assignment
make[5]: *** [config.lo] Error 1
make[5]: Leaving directory `/home/irc/bopm-3.1.2/src/libopm/src'
make[4]: *** [all] Error 2
make[4]: Leaving directory `/home/irc/bopm-3.1.2/src/libopm/src'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/irc/bopm-3.1.2/src/libopm'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/irc/bopm-3.1.2/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/irc/bopm-3.1.2/src'
make: *** [all-recursive] Error 1



solution ?

thank you