config.pod

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

sets C<this> macro to use the first of gconvert, gcvt, or sprintf
that pass sprintf-%g-like behaviour tests.  If perl is using
long doubles, the macro uses the first of the following
functions that pass Configure's tests: qgcvt, sprintf (if
Configure knows how to make sprintf format long doubles--see
sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
The gconvert_preference and gconvert_ld_preference variables
can be used to alter Configure's preferences, for doubles and
long doubles, respectively.  If present, they contain a
space-separated list of one or more of the above function
names in the order they should be tried.

d_Gconvert may be set to override Configure with a platform-
specific function.  If this function expects a double, a
different value may need to be set by the F<uselongdouble.cbu>
call-back unit so that long doubles can be formatted without
loss of precision.

=item C<d_getcwd>

From F<d_getcwd.U>:

This variable conditionally defines the C<HAS_GETCWD> symbol, which
indicates to the C program that the getcwd() routine is available
to get the current working directory.

=item C<d_getespwnam>

From F<d_getespwnam.U>:

This variable conditionally defines C<HAS_GETESPWNAM> if getespwnam() is
available to retrieve enchanced (shadow) password entries by name.

=item C<d_getfsstat>

From F<d_getfsstat.U>:

This variable conditionally defines the C<HAS_GETFSSTAT> symbol, which
indicates to the C program that the getfsstat() routine is available.

=item C<d_getgrent>

From F<d_getgrent.U>:

This variable conditionally defines the C<HAS_GETGRENT> symbol, which
indicates to the C program that the getgrent() routine is available
for sequential access of the group database.

=item C<d_getgrent_r>

From F<d_getgrent_r.U>:

This variable conditionally defines the C<HAS_GETGRENT_R> symbol,
which indicates to the C program that the getgrent_r()
routine is available.

=item C<d_getgrgid_r>

From F<d_getgrgid_r.U>:

This variable conditionally defines the C<HAS_GETGRGID_R> symbol,
which indicates to the C program that the getgrgid_r()
routine is available.

=item C<d_getgrnam_r>

From F<d_getgrnam_r.U>:

This variable conditionally defines the C<HAS_GETGRNAM_R> symbol,
which indicates to the C program that the getgrnam_r()
routine is available.

=item C<d_getgrps>

From F<d_getgrps.U>:

This variable conditionally defines the C<HAS_GETGROUPS> symbol, which
indicates to the C program that the getgroups() routine is available
to get the list of process groups.

=item C<d_gethbyaddr>

From F<d_gethbyad.U>:

This variable conditionally defines the C<HAS_GETHOSTBYADDR> symbol, which
indicates to the C program that the gethostbyaddr() routine is available
to look up hosts by their C<IP> addresses.

=item C<d_gethbyname>

From F<d_gethbynm.U>:

This variable conditionally defines the C<HAS_GETHOSTBYNAME> symbol, which
indicates to the C program that the gethostbyname() routine is available
to look up host names in some data base or other.

=item C<d_gethent>

From F<d_gethent.U>:

This variable conditionally defines C<HAS_GETHOSTENT> if gethostent() is
available to look up host names in some data base or another.

=item C<d_gethname>

From F<d_gethname.U>:

This variable conditionally defines the C<HAS_GETHOSTNAME> symbol, which
indicates to the C program that the gethostname() routine may be
used to derive the host name.

=item C<d_gethostbyaddr_r>

From F<d_gethostbyaddr_r.U>:

This variable conditionally defines the C<HAS_GETHOSTBYADDR_R> symbol,
which indicates to the C program that the gethostbyaddr_r()
routine is available.

=item C<d_gethostbyname_r>

From F<d_gethostbyname_r.U>:

This variable conditionally defines the C<HAS_GETHOSTBYNAME_R> symbol,
which indicates to the C program that the gethostbyname_r()
routine is available.

=item C<d_gethostent_r>

From F<d_gethostent_r.U>:

This variable conditionally defines the C<HAS_GETHOSTENT_R> symbol,
which indicates to the C program that the gethostent_r()
routine is available.

=item C<d_gethostprotos>

From F<d_gethostprotos.U>:

This variable conditionally defines the C<HAS_GETHOST_PROTOS> symbol,
which indicates to the C program that <netdb.h> supplies
prototypes for the various gethost*() functions.
See also F<netdbtype.U> for probing for various netdb types.

=item C<d_getitimer>

From F<d_getitimer.U>:

This variable conditionally defines the C<HAS_GETITIMER> symbol, which
indicates to the C program that the getitimer() routine is available.

=item C<d_getlogin>

From F<d_getlogin.U>:

This variable conditionally defines the C<HAS_GETLOGIN> symbol, which
indicates to the C program that the getlogin() routine is available
to get the login name.

=item C<d_getlogin_r>

From F<d_getlogin_r.U>:

This variable conditionally defines the C<HAS_GETLOGIN_R> symbol,
which indicates to the C program that the getlogin_r()
routine is available.

=item C<d_getmnt>

From F<d_getmnt.U>:

This variable conditionally defines the C<HAS_GETMNT> symbol, which
indicates to the C program that the getmnt() routine is available
to retrieve one or more mount info blocks by filename.

=item C<d_getmntent>

From F<d_getmntent.U>:

This variable conditionally defines the C<HAS_GETMNTENT> symbol, which
indicates to the C program that the getmntent() routine is available
to iterate through mounted files to get their mount info.

=item C<d_getnbyaddr>

From F<d_getnbyad.U>:

This variable conditionally defines the C<HAS_GETNETBYADDR> symbol, which
indicates to the C program that the getnetbyaddr() routine is available
to look up networks by their C<IP> addresses.

=item C<d_getnbyname>

From F<d_getnbynm.U>:

This variable conditionally defines the C<HAS_GETNETBYNAME> symbol, which
indicates to the C program that the getnetbyname() routine is available
to look up networks by their names.

=item C<d_getnent>

From F<d_getnent.U>:

This variable conditionally defines C<HAS_GETNETENT> if getnetent() is
available to look up network names in some data base or another.

=item C<d_getnetbyaddr_r>

From F<d_getnetbyaddr_r.U>:

This variable conditionally defines the C<HAS_GETNETBYADDR_R> symbol,
which indicates to the C program that the getnetbyaddr_r()
routine is available.

=item C<d_getnetbyname_r>

From F<d_getnetbyname_r.U>:

This variable conditionally defines the C<HAS_GETNETBYNAME_R> symbol,
which indicates to the C program that the getnetbyname_r()
routine is available.

=item C<d_getnetent_r>

From F<d_getnetent_r.U>:

This variable conditionally defines the C<HAS_GETNETENT_R> symbol,
which indicates to the C program that the getnetent_r()
routine is available.

=item C<d_getnetprotos>

From F<d_getnetprotos.U>:

This variable conditionally defines the C<HAS_GETNET_PROTOS> symbol,
which indicates to the C program that <netdb.h> supplies
prototypes for the various getnet*() functions.
See also F<netdbtype.U> for probing for various netdb types.

=item C<d_getpagsz>

From F<d_getpagsz.U>:

This variable conditionally defines C<HAS_GETPAGESIZE> if getpagesize()
is available to get the system page size.

=item C<d_getpbyname>

From F<d_getprotby.U>:

This variable conditionally defines the C<HAS_GETPROTOBYNAME>
symbol, which indicates to the C program that the
getprotobyname() routine is available to look up protocols
by their name.

=item C<d_getpbynumber>

From F<d_getprotby.U>:

This variable conditionally defines the C<HAS_GETPROTOBYNUMBER>
symbol, which indicates to the C program that the
getprotobynumber() routine is available to look up protocols
by their number.

=item C<d_getpent>

From F<d_getpent.U>:

This variable conditionally defines C<HAS_GETPROTOENT> if getprotoent() is
available to look up protocols in some data base or another.

=item C<d_getpgid>

From F<d_getpgid.U>:

This variable conditionally defines the C<HAS_GETPGID> symbol, which
indicates to the C program that the getpgid(pid) function
is available to get the process group id.

=item C<d_getpgrp>

From F<d_getpgrp.U>:

This variable conditionally defines C<HAS_GETPGRP> if getpgrp() is
available to get the current process group.

=item C<d_getpgrp2>

From F<d_getpgrp2.U>:

This variable conditionally defines the HAS_GETPGRP2 symbol, which
indicates to the C program that the getpgrp2() (as in F<DG/C<UX>>) routine
is available to get the current process group.

=item C<d_getppid>

From F<d_getppid.U>:

This variable conditionally defines the C<HAS_GETPPID> symbol, which
indicates to the C program that the getppid() routine is available
to get the parent process C<ID>.

=item C<d_getprior>

From F<d_getprior.U>:

This variable conditionally defines C<HAS_GETPRIORITY> if getpriority()
is available to get a process's priority.

=item C<d_getprotobyname_r>

From F<d_getprotobyname_r.U>:

This variable conditionally defines the C<HAS_GETPROTOBYNAME_R> symbol,
which indicates to the C program that the getprotobyname_r()
routine is available.

=item C<d_getprotobynumber_r>

From F<d_getprotobynumber_r.U>:

This variable conditionally defines the C<HAS_GETPROTOBYNUMBER_R> symbol,
which indicates to the C program that the getprotobynumber_r()
routine is available.

=item C<d_getprotoent_r>

From F<d_getprotoent_r.U>:

This variable conditionally defines the C<HAS_GETPROTOENT_R> symbol,
which indicates to the C program that the getprotoent_r()
routine is available.

=item C<d_getprotoprotos>

From F<d_getprotoprotos.U>:

This variable conditionally defines the C<HAS_GETPROTO_PROTOS> symbol,
which indicates to the C program that <netdb.h> supplies
prototypes for the various getproto*() functions.
See also F<netdbtype.U> for probing for various netdb types.

=item C<d_getprpwnam>

From F<d_getprpwnam.U>:

This variable conditionally defines C<HAS_GETPRPWNAM> if getprpwnam() is
available to retrieve protected (shadow) password entries by name.

=item C<d_getpwent>

From F<d_getpwent.U>:

This variable conditionally defines the C<HAS_GETPWENT> symbol, which
indicates to the C program that the getpwent() routine is available
for sequential access of the passwd database.

=item C<d_getpwent_r>

From F<d_getpwent_r.U>:

This variable conditionally defines the C<HAS_GETPWENT_R> symbol,
which indicates to the C program that the getpwent_r()
routine is available.

=item C<d_getpwnam_r>

From F<d_getpwnam_r.U>:

This variable conditionally defines the C<HAS_GETPWNAM_R> symbol,
which indicates to the C program that the getpwnam_r()
routine is available.

=item C<d_getpwuid_r>

From F<d_getpwuid_r.U>:

This variable conditionally defines the C<HAS_GETPWUID_R> symbol,
which indicates to the C program that the getpwuid_r()
routine is available.

=item C<d_getsbyname>

From F<d_getsrvby.U>:

This variable conditionally defines the C<HAS_GETSERVBYNAME>
symbol, which indicates to the C program that the
getservbyname() routine is available to look up services
by their name.

=item C<d_getsbyport>

From F<d_getsrvby.U>:

This variable conditionally defines the C<HAS_GETSERVBYPORT>
symbol, which indicates to the C program that the
getservbyport() routine is available to look up services
by their port.

=item C<d_getsent>

From F<d_getsent.U>:

This variable conditionally defines C<HAS_GETSERVENT> if getservent() is
available to look up network services in some data base or another.

=item C<d_getservbyname_r>

From F<d_getservbyname_r.U>:

This variable conditionally defines the C<HAS_GETSERVBYNAME_R> symbol,
which indicates to the C program that the getservbyname_r()
routine is available.

=item C<d_getservbyport_r>

From F<d_getservbyport_r.U>:

This variable conditionally defines the C<HAS_GETSERVBYPORT_R> symbol,
which indicates to the C program that the getservbyport_r()
routine is available.

=item C<d_getservent_r>

From F<d_getservent_r.U>:

This variable conditionally defines the C<HAS_GETSERVENT_R> symbol,
which indicates to the C program that the getservent_r()
routine is available.

=item C<d_getservprotos>

From F<d_getservprotos.U>:

This variable conditionally defines the C<HAS_GETSERV_PROTOS> symbol,
which indicates to the C program that <netdb.h> supplies
prototypes for the various getserv*() functions.
See also F<netdbtype.U> for probing for various netdb types.

=item C<d_getspnam>

From F<d_getspnam.U>:

This variable conditionally defines C<HAS_GETSPNAM> if getspnam() is
available to retrieve SysV shadow password entries by name.

=item C<d_getspnam_r>

From F<d_getspnam_r.U>:

This variable conditionally defines the C<HAS_GETSPNAM_R> symbol,
which indicates to the C program that the getspnam_r()
routine is available.

=item C<d_gettimeod>

From F<d_ftime.U>:

This variable conditionally defines the C<HAS_GETTIMEOFDAY> symbol, which
indicates that the gettimeofday() system call exists (to obtain a
sub-second accuracy clock). You should probably include <sys/resource.h>.

=item C<d_gmtime_r>

From F<d_gmtime_r.U>:

This variable conditionally defines the C<HAS_GMTIME_R> symbol,
which indicates to the C program that the gmtime_r()
routine is available.

=item C<d_gnulibc>

From F<d_gnulibc.U>:

Defined if we're dealing with the C<GNU> C Library.

=item C<d_grpasswd>

From F<i_grp.U>:

This variable conditionally defines C<GRPASSWD>, which indicates
that struct group in <grp.h> contains gr_passwd.

=item C<d_hasmntopt>

From F<d_hasmntopt.U>:

This variable conditionally defines the C<HAS_HASMNTOPT> symbol, which
indicates to the C program that the hasmntopt() routine is available
to query the mount options of file systems.

=item C<d_htonl>

From F<d_htonl.U>:

This variable conditionally defines C<HAS_HTONL> if htonl() and its
friends are available to do network order byte swapping.