'present but cannot be compiled'

[Avis, Ed]

Configuring rsync-2.6.0 on a Solaris 2.6 system, I saw the warnings

configure: WARNING: sys/fcntl.h: present but cannot be compiled
configure: WARNING: sys/fcntl.h: check for missing prerequisite headers?
configure: WARNING: sys/fcntl.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##

This happened for several header files:

sys/fcntl.h
sys/select.h
fcntl.h
sys/time.h
sys/unistd.h
utime.h
sys/param.h
ctype.h
sys/ioctl.h
sys/filio.h
sys/socket.h
sys/mode.h
sys/un.h
glob.h
arpa/inet.h
arpa/nameser.h
netdb.h
malloc.h
float.h

The gzipped config.log is attached.

-- 
Ed Avis <address@hidden>

config.log.gz
Description: config.log.gz