plplot build error

[mf2k (Frank Schima)]

I'm seeing the following build error when attempting to build plplot on Mac OS X 10.8.3, Xcode 4.6.1.

:info:build cd /opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/build/drivers && /usr/bin/clang  -DHAVE_CONFIG_H -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -DQT_SVG_LIB -Daqt_EXPORTS -I/opt/local/include -DUSE_INTERP_RESULT -DTcl_Import_TCL_DECLARED -O2 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -mmacosx-version-min=10.8 -fPIC -I/opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/plplot-5.9.9/include -I/opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/plplot-5.9.9/lib/qsastime -I/opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/plplot-5.9.9/lib/nistcd -I/opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/build -I/opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/build/include -I/opt/local/include -I/opt/local/include/QtSvg -I/opt/local/include/QtGui -I/opt/local/include/QtCore    -ObjC -F/opt/local/Library/Frameworks -framework AquaTerm -DUSINGDLL -o CMakeFiles/aqt.dir/aqt.c.o   -c /opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/plplot-5.9.9/drivers/aqt.c
:info:build clang: warning: -framework AquaTerm: 'linker' input unused
:info:build In file included from /opt/local/var/macports/build/_opt_mports_trunk_dports_science_plplot/plplot/work/plplot-5.9.9/drivers/aqt.c:32:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:76:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSURLError.h:12:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:18:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/AE.framework/Headers/AE.h:20:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/CarbonCore.h:87:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Components.h:26:
:info:build In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Files.h:56:
:info:build /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/DiskArbitration.framework/Headers/DADisk.h:28:10: fatal error: 'IOKit/IOKitLib.h' file not found
:info:build #include <IOKit/IOKitLib.h>
:info:build          ^
:info:build 1 error generated.
:info:build make[2]: *** [drivers/CMakeFiles/aqt.dir/aqt.c.o] Error 1

Note that I added:

use_parallel_build  no

To the portfile to get this far and see the error.