error configuring xorg-libX11 while installing gnuplot

[ariscampis@…]

sudo port install gnuplot
--->  Computing dependencies for gnuplot
--->  Dependencies to be installed: gd2 xpm xorg-libXext xorg-libX11 xorg-libXt xorg-libsm xorg-libice lua readline pango Xft2 xrender xorg-renderproto cairo glib2 libpixman xorg-xcb-util gobject-introspection harfbuzz graphite2 cmake libidn pdflib wxWidgets-3.0 wxWidgets_select
--->  Fetching archive for xorg-libX11
--->  Attempting to fetch xorg-libX11-1.6.2_0.darwin_9.i386.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/xorg-libX11
--->  Attempting to fetch xorg-libX11-1.6.2_0.darwin_9.i386.tbz2 from http://lil.fr.packages.macports.org/xorg-libX11
--->  Attempting to fetch xorg-libX11-1.6.2_0.darwin_9.i386.tbz2 from http://packages.macports.org/xorg-libX11
--->  Fetching distfiles for xorg-libX11
--->  Verifying checksums for xorg-libX11
--->  Extracting xorg-libX11
--->  Configuring xorg-libX11
Error: Failed to configure xorg-libX11, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_xorg-libX11/xorg-libX11/work/libX11-1.6.2/config.log
Error: org.macports.configure for port xorg-libX11 returned: configure failure: command execution failed
Error: Failed to install xorg-libX11
Please see the log file for port xorg-libX11 for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_xorg-libX11/xorg-libX11/main.log
Error: The following dependencies were not installed: gd2 xpm xorg-libXext xorg-libX11 xorg-libXt xorg-libsm xorg-libice lua readline pango Xft2 xrender xorg-renderproto cairo glib2 libpixman xorg-xcb-util gobject-introspection harfbuzz graphite2 cmake libidn pdflib wxWidgets-3.0 wxWidgets_select
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port gnuplot failed

[jeremyhu (Jeremy Huddleston Sequoia)]

:info:configure Package file '/opt/local/lib/pkgconfig/xcb.pc' appears to be empty

... ?

Do you have (or did you have) a full disk? Do you have hardware issues with your disk? Do you have a corrupt FS?

I suggest you uninstall the libxcb port, reboot into the restore partition, run Disk Utility, and Verify Disk (and likely Repair Disk).