asymptote 2.35 processing failed

[tobse_rave@…]

Hi,
I'm completely new to MacPorts, so first of all thank you very much for your effort.

My system:
MacOS 10.10
Xcode 6.4 with CLT
MacPorts 2.3.3

Apart from Xcode, I set up everything especially to install asymptote on my computer. 
I tried to follow the guide and used 'sudo port install asymptote', which started to install a list of dependencies. 
It took a while, but apparently went fine, until the the installation of asymptote itself which didn't succeed. 
As recommended I tried to clean and redo it, and I also uninstalled and reinstalled, but the outcome didn't change.

By using the trace mode during, this was prompted in Terminal:

--->  Configuring asymptote
Warning: The following existing files were hidden from the build system by trace mode:
  /opt/local/bin/bison
  /opt/local/bin/flex
  /opt/local/bin/gm4
--->  Building asymptote
Warning: The following existing files were hidden from the build system by trace mode:
  /opt/local/bin/autoconf
  /opt/local/bin/automake
  /opt/local/bin/gawk
  /opt/local/bin/gmkdir
  /opt/local/bin/gsed
  /opt/local/bin/gunzip
  /opt/local/bin/pkg-config
Error: org.macports.build for port asymptote returned: command execution failed 

The log file of a clean install is attached as well, and I hope this ticket contains all necessary 
information to track down the issue.

Thanks in advance!