config errors while building libpng 1.5.10

Hi Everbody,

I am trying to build libpng 1.5.10 with clang but am getting errors during configuration:

My config_target reads:

"export CPP=clang++" is very, very wrong. Don't do that. (I assume
you meant to write "export CXX=clang++".)


Clarification: CPP stands for C Preprocessor:

Yes, it is unfortunateā€¦