CMakeLists.txt: show USE_FFTW3=ON only if USE_TUI is also enabled

Author: yegorich

CMakeLists.txt

@@ -97,5 +97,9 @@ install(FILES httping.1 DESTINATION ${CMAKE_INSTALL_MANDIR})
 message(STATUS "CMake version: ${CMAKE_VERSION}")
 message(STATUS "Use SSL: ${USE_SSL}")
 message(STATUS "Use TUI: ${USE_TUI}")
-message(STATUS "Use FFTW3: ${USE_FFTW3}")
+if(USE_TUI AND USE_FFTW3)
+  message(STATUS "Use FFTW3: ON")
+else()
+  message(STATUS "Use FFTW3: OFF")
+endif()
 message(STATUS "Use gettext: ${USE_GETTEXT}")