From 0fdc8e921622d3614c22082a6934548e4a161bbc Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Sat, 7 Sep 2019 12:14:29 +0100
Subject: Escape %troff% expansion correctly in manual pages

Fixes part of Debian bug #892230.

* configure.ac: Substitute troff_as_troff_input, which is the same as
troff but with suitable escaping so that "groff -mandoc" turns into
"groff \-mandoc".
* man/replace.sin.in (%troff%): Substitute @troff_as_troff_input@ rather
than @troff@.
---
 configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 0cbd9c28..09d9d2b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -197,6 +197,14 @@ then
 else
 	troff="(troff not installed)"
 fi
+dnl We want to end up with "-" written as "\-" in manual pages.  This
+dnl requires additional \-escaping corresponding to the following quote
+dnl removal steps:
+dnl   1) the following sed command
+dnl   2) the following assignment
+dnl   2) sed running on the substituted version of man/replace.sin.in
+troff_as_troff_input=`echo "$troff" | sed 's/-/\\\\\\\\-/g'`
+AC_SUBST([troff_as_troff_input])
 
 if test -n "$nroff"
 then
-- 
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