dereferencing pointer to incomplete type

[Sharath]

Hi, 
Iam trying to build the source code for GNU Queue on Linux.
I executed the command --> ./configure --prefix=queue ; make ; make install 
on following sources
queue-1.40.1beta
queue-1.30.1
queue-1.20.1
At the compilation stage Iam getting the following error for all the above sources
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3923: dereferencing pointer to incomplete type
queued.c:3931: dereferencing pointer to incomplete type
queued.c:3931: dereferencing pointer to incomplete type
queued.c:3935: dereferencing pointer to incomplete type
queued.c:3936: dereferencing pointer to incomplete type
queued.c:3936: dereferencing pointer to incomplete type
queued.c:3938: dereferencing pointer to incomplete type
queued.c:3938: dereferencing pointer to incomplete type
queued.c:3946: dereferencing pointer to incomplete type
queued.c:3946: dereferencing pointer to incomplete type
queued.c:3947: dereferencing pointer to incomplete type
queued.c:3947: dereferencing pointer to incomplete type
queued.c:3955: dereferencing pointer to incomplete type
queued.c:3955: dereferencing pointer to incomplete type
queued.c: In function `check_query':
queued.c:4015: warning: passing arg 2 of `bind' from incompatible pointer type
queued.c:4041: warning: passing arg 2 of `bind' from incompatible pointer type
queued.c:4268: warning: assignment makes pointer from integer without a cast
queued.c:4300: warning: assignment makes pointer from integer without a cast

Can someone help me to fix this error.
Thanks & Regards,
Sharath