bug while installing package

[Anil Dongare]

hi,
 
While Installing mcrypt package, i got following warning.
 
==================================================================
configure: WARNING: mcrypt.h: accepted by the compiler, rejected by the 
preprocessor!
configure: WARNING: mcrypt.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden 
<mailto:address@hidden> . ##
configure: WARNING:     ## ------------------------------------ ##
====================================================================
 
can you pls. throw some light on this.
 
what could be the problem and how to resolve it.
 
thanks.
 
REGARDS,
-Anil