How to get rid of breakurl warning?

Question

How do I get rid of this warning:

"Package breakurl Warning: You are using breakurl while processing via pdflatex.(breakurl) \burl will be just a synonym of \url. on input line 48."

Why do I care? The journal we're submitting to states there should no latex warnings.

Context: I'm on Overleaf. There are some urls. I'm not calling the function burl (nor using packages hyperref/breakurl).

What I've tried:

• Looked into the source code (https://texdoc.org/serve/breakurl.pdf/0) - the code that causes it is on page 6.
• Tried to figure out if I can "not use" a package so it wouldn't try to load burl (looked into this but not sure relevant: How to NOT include a package in a TeX file?)
• Looked into other breakurl errors (e.g., Package breakurl Warning: You are using breakurl while processing via pdflatex) but couldn't find one that addressed this question.
• Loaded the two relevant packages directly: \usepackage{hyperref} \usepackage{breakurl}

Answer 1

My bet is that you're using some Springer Nature class.

The (scanty) documentation doesn't tell it, but if you want to avoid that warning you need to pass the class the option pdflatex.

Example 1

\documentclass{sn-jnl}
\begin{document}
\title{Test}
\author{Test}
\maketitle
\end{document}

In the log file you get

Package breakurl Warning: You are using breakurl while processing via pdflatex.
(breakurl)                \burl will be just a synonym of \url.
(breakurl)                 on input line 48.

Example 2

\documentclass[pdflatex]{sn-jnl}
\begin{document}
\title{Test}
\author{Test}
\maketitle
\end{document}

No warning in the log file.

Other classes

If you're not with a Springer Nature class, add

\makeatletter
\disable@package@load{burl}{}
\makeatother

at the very beginning of your file, before the \documentclass line.