are you still referring to this?
Quote:
Originally Posted by sunda
.../qt/lib/libQtGui.so: undefined reference to 'png_read_info@PNG12_0
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the problem is that libQtGui.so refers to symbols which are defined in the libpng12.so.0
try adding this to the .pro file (of your sketch application?).
LIBS_PRIVATE += -lpng12