sudo port install gnutar

[Charlse Darwin]

$ sudo port install gnutar
--->  Configuring gnutar
Error: Target org.macports.configure returned: configure failure:  
shell command " cd "/opt/local/var/macports/build/ 
_opt_local_var_macports_sources_rsync.macports.org_release_ports_archive 
rs_gnutar/work/tar-1.19" && ./configure --prefix=/opt/local --program- 
prefix=gnu --infodir=/opt/local/share/info " returned error 1
Command output: checking for ftruncate... yes
checking for gettimeofday... yes
checking for nanotime... no
checking for alarm... yes
checking for lchmod... no
checking for fdopendir... no
checking for mbsinit... yes
checking for mbrtowc... yes
checking for wcrtomb... yes
checking for wcscoll... yes
checking for setenv... yes
checking for sleep... yes
checking for strerror... yes
checking for lstat... yes
checking for pipe... yes
checking for futimes... yes
checking for futimesat... no
checking for vasnprintf... no
checking for iswcntrl... yes
checking for wcwidth... yes
checking for mkfifo... yes
checking for setlocale... yes
checking for d_ino member in directory struct... yes
checking whether system is Windows or MSDOS... no
checking for long file names... yes
checking whether canonicalize_file_name is declared... no
checking for unistd.h... (cached) yes
checking for working chown... yes
checking whether chown(2) dereferences symlinks... yes
configure: error: cannot run /bin/sh build-aux/config.sub

Error: Status 1 encountered during processing.
$