An enormous amount of compiler warnings in Debug build

[db4]

Environment

• Tesseract Version: 4.1.1-rc2
• Commit Number: 0c59955
• Platform: Windows x86_64

I'm trying to build tesseract 4.1.1-rc2 from sources using MSVC 2017. Release build succeeds in an acceptable time, but Debug one takes ages and generates ~170 Mbytes of compiler warnings. It's due to /Wall in

tesseract/CMakeLists.txt

Line 141 in 60b07d5

set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Wall /bigobj")

To fix this either tesseract sources should be cleaned up to get rid of compiler warnings or /Wall should be removed from CMakeLists.txt (of course, the latter solution is slightly simpler than the former one :-) )

[stweil]

See issue #1036.

[db4]

I'm not sure it's a duplicate of #1036. The current behavior was introduced 01-Nov-2019 14:30:15 in 5e3772c and is specific to MSVC (while old #1036 mostly addresses gcc/clang). And it should be fixed before 4.1.1 release (in my case it's a real show-stopper: travis CI build job cannot complete in 1 hour)

[stweil]

Let's discuss it nevertheless at #1036.