libgcc45 install fails on build -- command execution failure

[gentry.e@…]

On OS X 10.10 Yosemite, libgcc45 repeatedly fails to build (using 2011 Mac mini, 2.7GHz i7, 8GB ram)

In the terminal, the only error message is: "Error: org.macports.build for port libgcc45 returned: command execution failed Please see the log file for port libgcc45 for details:

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc45/libgcc45/main.log"

and I have attached that logfile.

(Initially there were also issues needing libunwind-headers to be deactivated while instailling libgcc45. After deactivating libunwind-headers seemed to fix the issue, but maybe it was related to the issue mentioned above)