PDF version 1.7 output using XeLaTex and texlive 2017

Question

I tried to use \pdfminorversion=7. This did not work, the error "!Undefined control sequence" popped up. Just to see if it would work, I also entered \pdfminorversion=2, with the same effect. Is there a possibility to create PDF version 1.7 with texlive 2017 using XeLaTeX? Are there packages or something else needed in addition? Due to a quite complex system that would not work otherwise, I have no possibility to update texlive or use something else instead of XeLaTex.

Answer 1

You can use a \special to set the version:

\documentclass{article}
%\special{dvipdfmx:config z 0} %to uncompress and check
\special{pdf:minorversion 7} %set minorversion


\begin{document}
abc
\end{document}