Compilation of 3.0.21a (and 3.0.21) under Tru64 Unix 5.1 using the native compiler fails asa follows:

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Compiling lib/fsusage.c
Compiling lib/ms_fnmatch.c
Compiling lib/select.c
Compiling lib/messages.c
Compiling lib/tallocmsg.c
Compiling lib/dmallocmsg.c
Compiling libsmb/smb_signing.c
Compiling lib/md5.c
Compiling lib/hmacmd5.c
Compiling lib/arc4.c
Compiling lib/iconv.c
Compiling nsswitch/wb_client.c
Compiling nsswitch/wb_common.c
cc: Error: nsswitch/wb_common.c, line 238: In this declaration, "socklen_t" must specify a type. (badparsedecl)
                socklen_t errnosize;
----------------^
cc: Error: nsswitch/wb_common.c, line 253: In this statement, "errnosize" is not declared. (undeclared)
                                        errnosize = sizeof(connect_errno);
----------------------------------------^
*** Exit 1
Stop.
#