RFC: Don't use GLOB in CMake files

[amitdo]

https://cmake.org/cmake/help/latest/command/file.html#glob

Note We do not recommend using GLOB to collect a list of source files from your source tree. If no CMakeLists.txt file changes when a source is added or removed then the generated build system cannot know when to ask CMake to regenerate. The CONFIGURE_DEPENDS flag may not work reliably on all generators, or if a new generator is added in the future that cannot support it, projects using it will be stuck. Even if CONFIGURE_DEPENDS works reliably, there is still a cost to perform the check on every rebuild.

https://github.com/search?q=repo%3Atesseract-ocr%2Ftesseract+glob+language%3Acmake&type=code

[amitdo]

If you don't want to bloat the CMake files with large list of files names, you can put them in separate files and use the include command to include the extra files.

https://cmake.org/cmake/help/latest/command/include.html

[amitdo]

Thank you!