textproc/syck ISSUE error: conflicting types for 'syckparse'

[awarecons]

Both gcc46 and 4.2:

/bin/sh ../config/ylwrap gram.y y.tab.c gram.c y.tab.h gram.h y.output
gram.output -- bison -y -d -d -t -v -p syck
updating gram.h
updating gram.output
gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I.. -I..   -O2 -pipe
-march=pentium4 -mtune=pentium4 -Wno-error -w -fPIC -O2 -pipe
-march=pentium4 -mtune=pentium4 -fPIC -fno-strict-aliasing -MT gram.o
-MD -MP -MF .deps/gram.Tpo -c -o gram.o gram.c
In file included from sycklex.h:4,
                 from gram.y:23:
gram.h:107: error: conflicting types for 'syckparse'
syck.h:471: error: previous declaration of 'syckparse' was here
*** Error code 1

Stop in /usr/ports/textproc/syck/work/syck-0.70/lib.
*** Error code 1

Stop in /usr/ports/textproc/syck/work/syck-0.70.
*** Error code 1