compiling bopm problems

I've expirienced problem wile compiling bopm

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/config.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

OS:Linux 2.4.27-2-686 #1 Tue Aug 16 16:31:22 JST 2005 i686 
GNU/Linux
GCC:gcc (GCC) 4.0.2 (Debian 4.0.1-9)
Copyright (C) 2005 Free Software Foundation, Inc.

how can i fix this?