I have a document using this macro to control various actions depending on whether it was being built under regular (pre-3.0) latex, or pdflatex:
\newif\ifpdf \ifx\pdfoutput\undefined \pdffalse % we are not running PDFLaTeX \else \pdfoutput=1 % we are running PDFLaTeX \pdftrue \fi I gather that in 3.0, \pdfoutput will be defined even when running 'latex' - is this correct? If so, is its value 0 when invoked as 'latex', so I still have some way to determine what this macro wants to know? Thanks, Jon
