我正在将一个 overleaf 项目上传到 arxiv，一切都编译正常，pdf 文档看起来与预期完全一致，但参考文献不可点击。我已遵循此处给出的所有说明，包括：
- 上传 bbl 文件。
- 重命名我的文件以在末尾包含 _renamed，然后上传 .aux 文件
- 移除
\usepackage{hyperref}
但链接仍然没有激活。实际的参考资料都已到位，但它们只是文本。对于引用和对图表的引用也是如此。arxiv 输出中没有任何内容表明发生了任何错误。我收到的唯一警告是：
) (/texlive/2020/texmf-dist/tex/latex/hyperref/xr-hyper.sty
Package xr-hyper Warning: Load package `hyperref' after `xr-hyper'.
)
我正在使用 xr-hyper 包来交叉引用我的附录。有趣的是，当我删除 \usepackage{natbib} 时，正文无法编译，因为它无法运行 \citep 函数，但附录突然出现了可点击的链接。
来自 arxiv 的日志文件：
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/amsfonts/cm/cmti7.pfb></texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm
/cmti9.pfb></texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm/cmtt10.pfb>
</texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm/cmtt8.pfb></texlive/20
20/texmf-dist/fonts/type1/public/amsfonts/cm/cmtt9.pfb></texlive/2020/texmf-dis
t/fonts/type1/public/amsfonts/symbols/msam7.pfb></texlive/2020/texmf-dist/fonts
/type1/public/amsfonts/symbols/msbm10.pfb></texlive/2020/texmf-dist/fonts/type1
/public/amsfonts/symbols/msbm7.pfb></texlive/2020/texmf-dist/fonts/type1/public
/cm-super/sfrm1000.pfb>
Output written on xxxpdfpages.pdf (44 pages, 1074799 bytes).
Transcript written on xxxpdfpages.log.
我的乳胶设置：
\RequirePackage{xr-hyper}
\documentclass{article}
\usepackage[a4paper,margin=2cm]{geometry}
\usepackage{amsfonts}
\usepackage{amsmath}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{mathtools}
\usepackage{latexsym}
\usepackage{authblk}
\usepackage{amsthm}
% \excludecomment{proof}
%\usepackage[notref, notcite]{showkeys}
\usepackage{graphicx, color}
\usepackage{titlesec}
\titleformat{\subsection}[runin]
{\normalfont\bfseries}{\thesubsection}{.5em}{}
\titleformat{\subsubsection}[runin]
{\normalfont\itshape}{\thesubsubsection}{.5em}{}
\theoremstyle{plain}
\newtheorem{definition}{Definition}
%
\newtheorem{remark}{Remark}
\usepackage{amssymb}
\usepackage[round]{natbib}
\newcommand{\al}{\alpha}
\newcommand{\te}{\theta}
\newcommand{\RR}{\mathbb{R}}
\newcommand{\cN}{\mathcal{N}}
\newcommand{\cP}{\mathcal{P}}
\newcommand{\given}{\,|\,}
\definecolor{blendedblue}{rgb}{0.2,0.2,0.7}
\newcommand{\sbl}[1]{{\color{blendedblue}{#1}}}
\newcommand{\gre}[1]{{\color{green}{#1}}}
\newcommand{\bl}[1]{\textcolor[rgb]{0.00,0.00,1.00}{#1}}
\newcommand{\ve}[1]{\textcolor[rgb]{0.00,1.00,0.00}{#1}}
\newcommand{\gris}[1]{\textcolor[RGB]{136,152,206}{#1}}
\newcommand{\ora}[1]{\textcolor[rgb]{1.00,0.50,0.00}{#1}}
\newcommand{\re}[1]{{\color{red}{#1}}}
\usepackage{algpseudocode}
\usepackage{algorithm,tabularx}
\usepackage{amsmath}
\usepackage{amssymb}
\DeclareMathOperator*{\argmax}{arg\,max}
\DeclareMathOperator*{\argmin}{arg\,min}
\usepackage{multirow}
\usepackage{subcaption}
\usepackage{wrapfig}
\usepackage{stfloats}
\newtheorem{problem}{Problem}
\usepackage{bbm}
\usepackage[dvipsnames,table]{xcolor}
\usepackage{float}
\usepackage{graphicx}
\newtheorem{theorem}{Theorem}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{proposition}{Proposition}
\newtheorem{lemma}{Lemma}
\usepackage{booktabs}
\definecolor{lightgray}{gray}{0.92}
\usepackage[font=small,labelfont=bf,width=0.85\textwidth]{caption}
\usepackage{multirow, makecell}
\usepackage{diagbox}
\usepackage{adjustbox}
\captionsetup[figure]{labelfont={bf},name={Fig.},labelsep=period}
\usepackage{afterpage}
\usepackage{pdflscape}
\usepackage[multiple]{footmisc}
\makeatletter
\newcommand{\multiline}[1]{%
\begin{tabularx}{\dimexpr\linewidth-\ALG@thistlm}[t]{@{}X@{}}
#1
\end{tabularx}
}
\makeatother
% \usepackage{subfig}
\usepackage{url}
\graphicspath{ {./images/} }
\renewcommand*{\Authand}{, }
\newcommand\NoDo{\renewcommand\ithmicdo{}} % remove "do" from algs
\algnewcommand\algorithmicforeach{\textbf{for each}}
\algdef{S}[FOR]{ForEach}[1]{\algorithmicforeach\ #1\ \algorithmicdo}
\theoremstyle{definition}
%\newcommand{\basedir}{./appendix}
\makeatletter
\let\@fnsymbol\@arabic
\makeatother
\setlength{\parindent}{1.5em}
\setlength{\parskip}{1em}
\renewcommand{\baselinestretch}{1.2}
%\usepackage{fancyhdr}
%\pagestyle{fancy}
%\fancyhf{}
\usepackage{hyperref}
\makeatletter
\newcommand*{\addFileDependency}[1]{% argument=file name and extension
\typeout{(#1)}% latexmk will find this if $recorder=0
% however, in that case, it will ignore #1 if it is a .aux or
% .pdf file etc and it exists! If it doesn't exist, it will appear
% in the list of dependents regardless)
%
% Write the following if you want it to appear in \listfiles
% --- although not really necessary and latexmk doesn't use this
%
\@addtofilelist{#1}
%
% latexmk will find this message if #1 doesn't exist (yet)
\IfFileExists{#1}{}{\typeout{No file #1.}}
}\makeatother
\newcommand*{\myexternaldocument}[1]{%
\externaldocument{#1}%
\addFileDependency{#1.tex}%
\addFileDependency{#1.aux}%
}
%------------End of helper code--------------
% put all the external documents here!
\myexternaldocument{z_appendix}
答案1
这是不幸的，但也是预料之中的行为（参见https://info.arxiv.org/help/submit_tex.html#how-to-include-supplemental-material) 在将多个.tex文档提供给 arXiv 编译器进行独立编译时，使用pdflatex(latex的处理方式不同)。然后，arXiv 编译器使用pdfpages不保留两个文档中的有效超链接的超链接。所有超链接都会受到影响，并且问题将不会出现xr-hyper。
给出了一些解决方法合并多个 PDF 文件而不破坏超链接但我不确定在 arXiv 仍生成单独的 PDF 的情况下这些是否可用。
根据您的需求和目的，您可以合并完整的文本文档以保持链接，或将补充内容作为 PDF 提供附属文件
您可以在本地使用以下方式查看问题
main.tex\documentclass{article} \pdfoutput=1 \usepackage{hyperref} \begin{document} \section{Foo}\label{foo} \clearpage \section{Bar} \ref{foo} \end{document}supp.tex\documentclass{article} \pdfoutput=1 \usepackage{hyperref} \begin{document} zzz \end{document}pdfpages.tex\documentclass{article} \pdfoutput=1 \usepackage{pdfpages} \usepackage{hyperref} \begin{document} \includepdf[pages=-]{main} \includepdf[pages=-]{supp} \end{document}