Compiling frameworks on emerge

[slangwhanger]

while compilng kservice  i encountered this : http://pastebin.com/9LrStpSd
here is the part of file in question : http://pasteboard.co/2nYRHdaN.png
I think that maybe json requires some libraries which are not present
first evidence is at line 367 in the compile output
and maybe that causes the errors around 516
I tried different solutions for hours but to no avail
anyone with json knowledge maybe?
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