Quote from releasescripts/makesourcepackages.sh:147
echo 'Adding lincence and dependencies for independent building...'

Quote from CMakeLists.txt

if ( wadseeker_FOUND AND NOT FORCE_INTERNAL_WADSEEKER )
    message( STATUS "Using system Wadseeker library" )
else( wadseeker_FOUND AND NOT FORCE_INTERNAL_WADSEEKER )
    message( STATUS "Using internal Wadseeker library" )

Quote from makesourcepackages.sh

	echo 'Adding licence and dependencies for independent building...'
    cp "$doomseekerArchiveName/LICENSE.json" "$doomseekerArchiveName/src/wadseeker"
    
cp -r "$doomseekerArchiveName/cmake" "$doomseekerArchiveName/src/wadseeker"

Quote
wadseeker_FOUND

Quote
find_library_wadseeker

Quote from Wub

What is the difference?

Quote from Linda

I don't use this script, but it could be fragile if wadseeker directory is missing. (LICENSE.json would be renamed as wadseeker, and/or cmake would be renamed as wadseeker directory).

Quote from Wub

find_package_WADSEEKER for consistency?

Quote from Wub

WADSEEKER_FOUND for consistency?

Quote from Pol M
It prints whether we are using wadseeker as an internal library or if we are using the system's library.

if (a)
    # do something with a
else (a)
    # also a; never reached? 

if(expression)
  # if block.
else(expression)
  # else block.

if(expression)
  # if block.
else()
  # else block.

Quote from https://cmake.org/cmake/help/latest/command/if.html

if(<condition>)
  <commands>
elseif(<condition>) # optional block, can be repeated
  <commands>
else()              # optional block
  <commands>
endif()

Quote from https://cmake.org/cmake/help/latest/command/if.html
Per legacy, the else() and elseif() commands admit an optional <condition> argument. If used, it must be a verbatim repeat of the argument of the opening if command.

Quote from https://cmake.org/cmake/help/latest/command/if.html
If the result is true, then the commands in the if block are executed. Otherwise, optional elseif blocks are processed in the same way.

Per legacy, the else() and elseif() commands admit an optional <condition> argument. If used, it must be a verbatim repeat of the argument of the opening if command.

Quote from Wub

I also see a contradiction here about elseif().