[CMake] FindDoxygen is doing find_package() when it is included

[Robert Dailey]

When I do this:


message( "blah1" )
include( FindDoxygen )

message( "blah2" )
find_package( Doxygen 1.8.6 OPTIONAL_COMPONENTS dot )
message( "blah3" )


I get this output:


blah1
-- Found Doxygen: C:/Program Files/doxygen/bin/doxygen.exe (found
version "1.8.13") found components:  doxygen missing components:  dot
blah2
-- Found Doxygen: C:/Program Files/doxygen/bin/doxygen.exe (found
suitable version "1.8.13", minimum required is "1.8.6") found
components:  doxygen missing components:  dot
blah3


Two questions:

1. Why is find_package() happening automatically when I include the
find module? This is contrary to the behavior of other find modules. I
do not want it to find doxygen for me, as I have some minimum version
requirements and I do not want it to find dot. How can I disable this
implied search behavior?

2. Each time I run my scripts, it keeps searching for doxygen. Even
though I've specified dot as an optional component. I do not want it
to keep searching for doxygen each time I generate. It should find it
once and be done. How can I fix this behavior?