***** autoconf *****
***** PWD: /var/tmp/portage/sci-biology/vcftools-0.1.14/work/vcftools-0.1.14
***** autoconf --force

sh: build-aux/git-version-gen: No such file or directory
sh: build-aux/git-version-gen: No such file or directory
sh: build-aux/git-version-gen: No such file or directory
configure.ac:6: error: possibly undefined macro: m4_esyscmd
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.