checking sys/mount.h usability... no
checking sys/mount.h presence... yes
configure: WARNING: sys/mount.h: present but cannot be compiled
configure: WARNING: sys/mount.h:     check for missing prerequisite headers?
configure: WARNING: sys/mount.h: see the Autoconf documentation
configure: WARNING: sys/mount.h:     section "Present But Cannot Be 
Compiled"
configure: WARNING: sys/mount.h: proceeding with the preprocessor's result
configure: WARNING: sys/mount.h: in the future, the compiler will take 
precedence
configure: WARNING:     ## ------------------------------------------ ##
configure: WARNING:     ## Report this to the AC_PACKAGE_NAME lists.  ##
configure: WARNING:     ## ------------------------------------------ ##
checking for sys/mount.h... yes
checking sys/filsys.h usability... no
checking sys/filsys.h presence... no
checking for sys/filsys.h... no
checking sys/fs_types.h usability... no
checking sys/fs_types.h presence... no
checking for sys/fs_types.h... no
checking sys/fs/s5param.h usability... no
checking sys/fs/s5param.h presence... no
checking for sys/fs/s5param.h... no
checking for bcopy... yes
checking for endgrent... yes
checking for endpwent... yes
checking for fchdir... yes
checking for ftime... no
checking for ftruncate... yes
checking for getcwd... (cached) yes
checking for getmntinfo... yes
checking for gettimeofday... (cached) yes
checking for isascii... yes
checking for lchown... yes
checking for listmntent... no
checking for memcpy... yes
checking for mkfifo... yes
checking for strchr... yes
checking for strerror... (cached) yes
checking for strrchr... yes
checking for vprintf... yes
checking for getmntent in -lsun... no
checking for getmntent in -lseq... no
checking for getmntent in -lgen... no
checking for getmntent... no
checking for listmntent of Cray/Unicos-9... no
checking for getfsstat function... no
checking for mntctl function and struct vmount... no
checking for FIXME existence of three headers... no
checking for getmntinfo function... no
checking for getmnt function... no
checking whether it is possible to resort to fread on /etc/mnttab... no
configure: error: could not determine how to read list of mounted 
filesystems
*** Error code 1
======================
FROM config.log:

configure:29194: checking sys/mount.h usability
configure:29206: gcc -c -O2 -I/usr/pkg/include -I/usr/include 
-I/usr/pkg/include -I/usr/include conftest.c >&5
In file included from /usr/include/sys/mount.h:43,
                  from conftest.c:100:
/usr/include/sys/ucred.h:47: error: `NGROUPS' undeclared here (not in a 
function)
/usr/include/sys/ucred.h:55: error: `NGROUPS' undeclared here (not in a 
function)
configure:29212: $? = 1
configure: failed program was:
| /* confdefs.h.  */
==============================