This change to the Portfile got it to build for me; apparently those files are
in a different location now, so the original pre-check failed (properly
installed Xcode and command line tools will find it regardless of the
pre-check, so this is all that needed to be changed). Since soprano is a
prerequisite for kdelibs4 (and therefore all that depends on, like
kdegames4!!), this was really a problem for me until I found the workaround.
bigapple:soprano root# diff Portfile.orig Portfile
45c45
< if {![file isfile
"/System/Library/Frameworks/JavaVM.framework/Headers/jni.h"]} {
---
> if {![file isfile
> "/System/Library/Frameworks/JavaVM.framework/Headers/jni.h"] && ![file isfile
> "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers/jni.h"]}
> {
