From e81fd5d5ba24e46a3a27c6a4e061932cf2022ef2 Mon Sep 17 00:00:00 2001
From: Craig Scott <craig.scott@crascit.com>
Date: Sun, 27 Jan 2019 10:34:05 +1100
Subject: FindDoxygen: Escape backslashes in default values

Doxygen 1.8.15 added a new LATEX_MAKEINDEX_CMD config
item and it has a default value that contains a backslash on
some installations.

Fixes: #18738
---
 Modules/FindDoxygen.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Modules/FindDoxygen.cmake b/Modules/FindDoxygen.cmake
index 2ed9449..cb4738b 100644
--- a/Modules/FindDoxygen.cmake
+++ b/Modules/FindDoxygen.cmake
@@ -708,7 +708,9 @@ if(TARGET Doxygen::doxygen)
         if(_line MATCHES "([A-Z][A-Z0-9_]+)( *=)(.*)")
             set(_key "${CMAKE_MATCH_1}")
             set(_eql "${CMAKE_MATCH_2}")
-            string(REPLACE ";" "\\\n" _value "${CMAKE_MATCH_3}")
+            set(_value "${CMAKE_MATCH_3}")
+            string(REPLACE "\\" "\\\\" _value "${_value}")
+            string(REPLACE ";" "\\\n" _value "${_value}")
             list(APPEND _Doxygen_tpl_params "${_key}${_eql}${_value}")
         endif()
     endforeach()
-- 
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