I am asked to use the latest
acmart style for my paper. However, when I downloaded the template and tried to compile the sample text, it failed with message
! LaTeX Error: File iftex.sty not found.
My command is:
> pdflatex sample-sigplan.tex (also tried
and the package and template I downloaded is https://www.acm.org/publications/proceedings-template
acmart.cls is from http://www.sigplan.org/sites/default/files/acmart/current/acmart.cls
My system is Ubuntu 14.04. How to fix it?