Sorry, the previous patch was incomplete. The attached patch is correct.
Best regards,
Juan Manuel
Juan Manuel Macías writes:
> Rationale for the attached patch: It seems that a common problem that
> users have with exporting to LaTeX is unicode characters that cannot be
> represented in pdfLaTeX or LuaLaTeX/XelaTeX. In the Unicode TeX engines
> the warning is insidious, since the missing character warning is not
> preceded by a 'warning' string.
>
> Naturally, the added Org warnings do not solve the problem, but at least
> they give some clues on how to properly adjust the document.
>From 19fb7b81d6ce3a657c86497707f590063b27683c Mon Sep 17 00:00:00 2001
From: Juan Manuel Macias <maciasch...@posteo.net>
Date: Mon, 12 Feb 2024 16:10:28 +0100
Subject: [PATCH] lisp/ox-latex.el: Add missing character warnings
* (org-latex-known-warnings): Two missing character warnings are
added: one for LuaLaTeX/XelaTeX and another for pdfLaTeX.
---
lisp/ox-latex.el | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index cfa2b8178..da4792c04 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -1511,6 +1511,8 @@ logfiles to remove, set `org-latex-logfiles-extensions'."
("Underfull \\hbox" . "[underfull hbox]")
("Overfull \\hbox" . "[overfull hbox]")
("Citation.*?undefined" . "[undefined citation]")
+ ("LaTeX Error: Unicode character" . "[unicode character(s) not set up for use with pdflatex. You can run lualatex or xelatex instead]")
+ ("Missing character: There is no" . "[Missing character(s): please load an appropriate font with the fontspec package]")
("Undefined control sequence" . "[undefined control sequence]"))
"Alist of regular expressions and associated messages for the user.
The regular expressions are used to find possible warnings in the
@@ -4435,7 +4437,11 @@ encountered or nil if there was none."
(save-excursion
(goto-char (point-max))
(when (re-search-backward "^[ \t]*This is .*?TeX.*?Version" nil t)
- (if (re-search-forward "^!" nil t) 'error
+ (if (and
+ (re-search-forward "^!\\(.+\\)" nil t)
+ ;; This error is passed as missing character warning
+ (not (string-match-p "Unicode character" (match-string 1))))
+ 'error
(let ((case-fold-search t)
(warnings ""))
(dolist (warning org-latex-known-warnings)
--
2.43.1
