diffutils@3.10_0 Fails to Configure on High Sierra

[RobK88]

diffutils fails to configure on High Sierra:

--->  Configuring diffutils
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_diffutils/diffutils/work/diffutils-3.10" && ./configure --prefix=/opt/local --disable-dependency-tracking --program-prefix=g --infodir=/opt/local/share/info --mandir=/opt/local/share/man 
checking for a BSD-compatible install... /usr/bin/install -c
checking whether sleep supports fractional seconds... true
checking the filesystem timestamp resolution... 0.7
checking whether build environment is sane... yes
checking for a race-free mkdir -p... /opt/local/bin/gmkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking xargs -n works... yes
checking for gawk... (cached) gawk
checking for gcc... /usr/bin/clang
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether /usr/bin/clang accepts -g... yes
checking for /usr/bin/clang option to enable C11 features... none needed
checking whether /usr/bin/clang understands -c and -o together... yes
checking whether the compiler is clang... yes
checking for compiler option needed when checking for declarations... -Werror=implicit-function-declaration
checking whether make supports the include directive... yes (GNU style)
checking dependency style of /usr/bin/clang... none
checking for ranlib... ranlib
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for wchar.h... yes
checking for minix/config.h... no
checking for sys/socket.h... yes
checking for error.h... no
checking for fnmatch.h... yes
checking for getopt.h... yes
checking for sys/cdefs.h... yes
checking for sys/time.h... yes
checking for threads.h... no
checking for iconv.h... yes
checking for limits.h... yes
checking for crtdefs.h... no
checking for wctype.h... yes
checking for langinfo.h... yes
checking for xlocale.h... yes
checking for sys/mman.h... yes
checking for sys/param.h... yes
checking for malloc.h... no
checking for stdbool.h... yes
checking for stdckdint.h... no
checking for sys/random.h... yes
checking for sys/wait.h... yes
checking for features.h... no
checking for arpa/inet.h... yes
checking for netdb.h... yes
checking for netinet/in.h... yes
checking for sys/select.h... yes
checking for pthread.h... yes
checking for sys/ioctl.h... yes
checking for sys/uio.h... yes
checking for vfork.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking whether _XOPEN_SOURCE should be defined... no
checking build system type... x86_64-apple-darwin17.7.0
checking host system type... x86_64-apple-darwin17.7.0
checking how to run the C preprocessor... /usr/bin/clang -E
checking for egrep -e... /usr/bin/grep -E
checking for Minix Amsterdam compiler... no
checking for ar... ar
checking for /usr/bin/clang option to enable large file support... none needed
checking for /usr/bin/clang option for timestamps after 2038... support not detected
configure: error: in '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_diffutils/diffutils/work/diffutils-3.10':
configure: error: this system appears to support timestamps after
mid-January 2038, but no mechanism for enabling wide
'time_t' was detected. Did you mean to build a 64-bit
binary? (E.g., 'CC="/usr/bin/clang -m64"'.) To proceed with
32-bit time_t, configure with '--disable-year2038'.
See 'config.log' for more details
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_diffutils/diffutils/work/diffutils-3.10" && ./configure --prefix=/opt/local --disable-dependency-tracking --program-prefix=g --infodir=/opt/local/share/info --mandir=/opt/local/share/man 
Exit code: 1
Error: Failed to configure diffutils: consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_diffutils/diffutils/work/diffutils-3.10/config.log
Error: Failed to configure diffutils: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_diffutils/diffutils/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

see attached main.log