Hi Werner,
An interesting, and confusing, distinction for OSX. However, I could not find versions of the autotool binaries with a preceding 'g'.
To ensure that I am using GNU commands, I checked their versions with the `--version` option:
automake (GNU automake) 1.14.1
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Tom Tromey <address@hidden>
and Alexandre Duret-Lutz <address@hidden>.
autoconf (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by David J. MacKenzie and Akim Demaille.
From that output, these appear to be genuine GNU commands, and above the minimum versions required in `README.git`.
However, the output for `libtool` certainly indicates an Apple binary:
Apple Inc. version cctools-855
Could this be why `configure` is erroring out?