更新 TeX Live Utility（版本 1.26）和一些 Emacs 软件包后，当我执行以下操作时，EPS 到 PDF 的转换不再起作用：
\documentclass{beamer}
\usepackage{pgfpages}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage[outdir=./img/]{epstopdf}
\graphicspath{{img/}}
\begin{document}
\begin{frame}
\begin{tikzpicture}[remember picture,overlay]
\node [anchor=west, inner sep=5pt] at
(current page.west) {\includegraphics[height=6cm]{circle_fitted}};
\end{tikzpicture}
\end{frame}
\end{document}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% TeX-command-extra-options: "-shell-escape"
%%% End:
请注意，我正在指定标志“-shell-escape”。
错误说：
ERROR: Package pdftex.def Error: File `./img/circle_fitted-eps-converted-to.pdf' not found.
--- TeX said ---
See the pdftex.def package documentation for explanation.
Type H <return> for immediate help.
...
l.14 \end{frame}
--- HELP ---
No help available
编译的输出是
Running `LaTeX' on `test' with ``pdflatex -file-line-error -interaction=nonstopmode "\input" test.tex''
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016) (preloaded format=pdflatex)
restricted \write18 enabled.
entering extended mode
LaTeX2e <2016/03/31> patch level 3
Babel <3.9r> and hyphenation patterns for 83 language(s) loaded.
(./test.tex (/usr/local/texlive/2016/texmf-dist/tex/latex/beamer/beamer.cls
(/usr/local/texlive/2016/texmf-dist/tex/latex/beamer/beamerbasercs.sty)
Document Class: beamer 2015/01/05 3.36 A class for typesetting presentations (rcs-revision 8a39122e1f63)
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on input line 8.
(./test.nav)epstopdf ($Id: epstopdf.pl 41577 2016-06-30 16:38:01Z karl $) 2.25
!!! Error: Cannot open Ghostscript for piped input: gs -q -dSAFER -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=./img/circle_fitted-eps-converted-to.pdf -dPDFSETTINGS#/prepress -dMaxSubsetPct=100 -dSubsetFonts=true -dEmbedAllFonts=true -dAutoRotatePages#/None - -c quit
system returned with code 512
./test.tex:14: Package pdftex.def Error: File `./img/circle_fitted-eps-converted-to.pdf' not found.
See the pdftex.def package documentation for explanation.
Type H <return> for immediate help.
...
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LaTeX Font Warning: Font shape `OT1/cmss/m/n' in size <4> not available
(Font) size <5> substituted on input line 14.
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LaTeX Font Warning: Size substitutions with differences
(Font) up to 1.0pt have occurred.
)
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Output written on test.pdf (1 page, 14000 bytes).
Transcript written on test.log.
TeX Output exited abnormally with code 1 at Mon Sep 12 19:31:38
更新
正如 David Carlisle 在评论中提到的，问题出在 Ghostscript (gs) 上。如果我lualatex --jobname=main -file-line-error -interaction=nonstopmode "\input" main.tex在终端中运行，一切都会正常。因此，问题在于 Emacs 无法找到 gs，即使我在文件中插入了以下内容~/.emacs：
(setq preview-gs-command "/opt/local/bin/gs")
我从终端输入的输出中获取了路径which gs。有谁知道我可以尝试解决我的问题吗？
答案1
对我有用的解决方案如下：
- 由于我能够从终端进行编译，因此我怀疑 gs 的路径有问题。我
which gs在内部 shell 中运行，结果显示 Emacs 确实看不到 gs。 我在我的文件中添加了以下行
.emacs（gs 的位置是通过which gs在终端中运行获得的）：(setenv "PATH" (concat "/opt/local/bin/:" (getenv "PATH")))
而且它成功了！
答案2
有一个 exec-path-from-shell 可用https://melpa.org/这可能与您的问题有关。