Subject: Vendor upstream patches (mercurial/sourceforge)
Author: Andreas Metzler

From:
- https://sourceforge.net/p/panotools/libpano13/ci/698e20b4d296c1dbde9d010c3fb8d54050e56ddb/
- https://sourceforge.net/p/panotools/libpano13/ci/6b0f2a5ef7a0490866fb224158d1dfbb8bf5896f/

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,8 +28,7 @@
 ## may need to edit the wxWidgets version number below.
 ##
 
-# require at least cmake 3.0
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.12...4.0)
 if(POLICY CMP0074)
   cmake_policy(SET CMP0074 NEW)
 endif()
@@ -382,12 +382,12 @@
 endif()
 
 # create TAGS file
-ADD_CUSTOM_COMMAND( OUTPUT ctags POST_BUILD
-                   COMMAND ctags-exuberant -e *.c *.h tools/*.c
+ADD_CUSTOM_COMMAND( OUTPUT ${PROJECT_SOURCE_DIR}/TAGS
+                   COMMAND ctags -e *.c *.h tools/*.c
                    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/
                    COMMENT "Build TAGS file"
                  )
-ADD_CUSTOM_TARGET( TAGS DEPENDS ctags)
+ADD_CUSTOM_TARGET( TAGS DEPENDS ${PROJECT_SOURCE_DIR}/TAGS)