$NetBSD: patch-doc_CmakeLists.txt,v 1.2 2021/12/13 13:02:14 nia Exp $

Install man pages under ${CMAKE_INSTALL_MANDIR}.

--- doc/CMakeLists.txt.orig	2021-10-31 06:48:42.000000000 +0000
+++ doc/CMakeLists.txt
@@ -13,4 +13,4 @@ endif (ENABLE_IMAGE_PNG AND PNG_FOUND)
 
 install(FILES
   ${manpages}
-  DESTINATION share/man/man1)
+  DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)