I got the errors:
../libtool --mode=compile gcc -msse2  -c -g -O2 -I.. -I.. -I../lib/src -I/usr/include/libxml2   -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include        -DHAVE_CONFIG_H -DLIBDIR=\"/home/helio/lib\"    -o genlex.lo ../lib/src/genlex.c
libtool: compile:  gcc -msse2 -c -g -O2 -I.. -I.. -I../lib/src -I/usr/include/libxml2 -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -DHAVE_CONFIG_H -DLIBDIR=\"/home/helio/lib\" ../lib/src/genlex.c  -fPIC -DPIC -o .libs/genlex.o
../lib/src/genlex.c: In function 'look_up_word':
../lib/src/genlex.c:1020:14: error: 'parsing_query' undeclared (first use in this function)
../lib/src/genlex.c:1020:14: note: each undeclared identifier is reported only once for each function it appears in
make[1]: ** [genlex.lo] Erro 1
make[1]: Saindo do diretório `/home/helio/gretl/lib'
make: ** [lib] Erro 2