Applied Math 205: Con guring C++

(iii) In Ubuntu 18.04: if libQtOpenGL.so.4 is missing, use sudo apt install libqt4-opengl (iv) xds-viewer needs libpng12.so.0 to work. But libpng12-0 is missing in Ubuntu 18.04, 19.10 or 20.04. To fix this issue install libpng by using a PPA created with an updated ................
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