That's a new one for me. Can you send the output of:
I'll attach my output for comparison.
Bock [build/libslax]% make -n slaxparser.c
echo " BUILD " slaxparser-xpl.y;sed 's/xp_/xpl_/g' < ../../libslax/slaxparser-xp.y > slaxparser-xpl.y
echo " BUILD " slaxparser-out.y;cat ../../libslax/slaxparser.y ../../libslax/slaxparser-xp.y slaxparser-xpl.y ../../libslax/slaxparser-tail.y > slaxparser-out.y
echo " BISON " slaxparser.c;/opt/local/bin/bison -kvd -b slaxparser -o slaxparser.c slaxparser-out.y
/bin/mv slaxparser.c slaxparser.c.old
/opt/local/bin/gsed -e 's:int yyparse (void);::' -e 's/yyparse (void \*YYPARSE_PARAM)/slaxParse (slax_data_t *slax_data)/' -e 's:yyvs = yyvsa;:yyvs = yyvsa; bzero(yyvsa, sizeof(yyvsa));:' < slaxparser.c.old > slaxparser.c
/bin/rm slaxparser.c.old
Bock [build/libslax]% make V=1 slaxparser.o
sed 's/xp_/xpl_/g' < ../../libslax/slaxparser-xp.y > slaxparser-xpl.y
cat ../../libslax/slaxparser.y ../../libslax/slaxparser-xp.y slaxparser-xpl.y ../../libslax/slaxparser-tail.y > slaxparser-out.y
/opt/local/bin/bison -kvd -b slaxparser -o slaxparser.c slaxparser-out.y
slaxparser-out.y: conflicts: 25 shift/reduce, 1 reduce/reduce
gcc -DHAVE_CONFIG_H -I. -I../../libslax -I.. -I../.. -I/Users/phil/work/root/include -I/Users/phil/work/root/include/libxml2 -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Werror -Waggregate-return -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment -Wformat -Wimplicit -Wmissing-declarations -Wnested-externs -Wparentheses -Wreturn-type -Wshadow -Wswitch -Wtrigraphs -Wuninitialized -Wunused -Wwrite-strings -fno-inline-functions-called-once -DLIBSLAX_XMLSOFT_NEED_PRIVATE -DSLAX_EXTDIR=\"/Users/phil/work/root/lib/slax/extensions\" -g -O2 -MT slaxparser.o -MD -MP -MF .deps/slaxparser.Tpo -c -o slaxparser.o slaxparser.c
mv -f .deps/slaxparser.Tpo .deps/slaxparser.Po