Error installing new MacPorts base

[maisarojas@…]

maisas-MacBook-Pro:~ maisa$ sudo port -d selfupdate
DEBUG: Copying /Users/maisa/Library/Preferences/com.apple.dt.Xcode.plist to /opt/local/var/macports/home/Library/Preferences
DEBUG: MacPorts sources location: /opt/local/var/macports/sources/rsync.macports.org/release/base
--->  Updating MacPorts base sources using rsync
receiving file list ... done
./
deleting config.log

sent 42 bytes  received 30280 bytes  6738.22 bytes/sec
total size is 25420143  speedup is 838.34
MacPorts base version 2.3.3 installed,
DEBUG: Rebuilding and reinstalling MacPorts if needed
MacPorts base version 2.3.4 downloaded.
--->  Updating the ports tree
Synchronizing local ports tree from rsync://rsync.macports.org/release/ports/
DEBUG: /usr/bin/rsync -rtzv --delete-after '--exclude=/PortIndex*' rsync://rsync.macports.org/release/ports/ /opt/local/var/macports/sources/rsync.macports.org/release/ports
receiving file list ... done

sent 53 bytes  received 813891 bytes  70777.74 bytes/sec
total size is 41893831  speedup is 51.47
DEBUG: /usr/bin/rsync -rtzv --delete-after rsync://rsync.macports.org/release/ports/PortIndex_darwin_14_i386/PortIndex /opt/local/var/macports/sources/rsync.macports.org/release/ports
receiving file list ... done

sent 36 bytes  received 70 bytes  42.40 bytes/sec
total size is 13131586  speedup is 123882.89
--->  MacPorts base is outdated, installing new version 2.3.4
DEBUG: Permissions OK
Installing new MacPorts release in /opt/local as root:admin; permissions 0755

checking build system type... i386-apple-darwin14.5.0
checking host system type... i386-apple-darwin14.5.0
checking target system type... i386-apple-darwin14.5.0
checking MacPorts version... 2.3.4
checking for sw_vers... /usr/bin/sw_vers
checking for defaults... /usr/bin/defaults
checking for xcode-select... /usr/bin/xcode-select
checking Mac OS X version... 10.10.5
checking Xcode location... /Applications/Xcode.app/Contents/Developer
checking Xcode version... 7.0.1
checking whether the C compiler works... no
configure: error: in `/opt/local/var/macports/sources/rsync.macports.org/release/base':
configure: error: C compiler cannot create executables
See `config.log' for more details
Command failed: cd /opt/local/var/macports/sources/rsync.macports.org/release/base && CC=/usr/bin/cc OBJC=/usr/bin/cc ./configure --prefix=/opt/local --with-install-user=root --with-install-group=admin --with-directory-mode=0755 --enable-readline && make SELFUPDATING=1 && make install SELFUPDATING=1
Exit code: 77
DEBUG: Error installing new MacPorts base: command execution failed
    while executing
"macports::selfupdate [array get global_options] base_updated"
Error: Error installing new MacPorts base: command execution failed
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: /opt/local/bin/port: port selfupdate failed: Error installing new MacPorts base: command execution failed

[ryandesign (Ryan Carsten Schmidt)]

Could you attach the config.log, please? It may tell us why your C compiler cannot create executables.