The package libkf5pimtextedittexttospeech-dev doesn't contain KF5TextEditTextToSpeechConfig.cmake (or any other .cmake file). I'm trying to build an app with kdesrc-build which requires this, so the build fails. libkf5textedittexttospeech is required by libkf5pimtextedit5. The only -dev package for *textedittexttospeech is libkf5pimtextedittexttospeech-dev, so logically it needs to contain the missing .cmake file. SOFTWARE/OS VERSIONS Up to date (today) Neon unstable.
It got moved to ktextaddons libkf5textedittexttospeech1 and libkf5ktextaddons-dev contain the files. The lib is now /usr/lib/x86_64-linux-gnu/libKF5TextEditTextToSpeech.so.1.3.41 libkf5pimtextedit5 depends on libkf5textedittexttospeech1 let me know if you still have issues