[cmake] Build qttxf tool

src/tools/CMakeLists.txt

@@ -1,3 +1,4 @@
 add_subdirectory(cmod)
+add_subdirectory(qttxf)
 add_subdirectory(stardb)
 add_subdirectory(xyzv2bin)

src/tools/qttxf/CMakeLists.txt

@@ -0,0 +1,23 @@
+if(NOT ENABLE_QT)
+  message("Qt frontend is disabled, not building qttxf.")
+  return()
+endif()
+
+if(APPLE AND EXISTS /usr/local/opt/qt5)
+  # Homebrew installs Qt5 (up to at least 5.9.1) in
+  # /usr/local/qt5, ensure it can be found by CMake since
+  # it is not in the default /usr/local prefix.
+  list(APPEND CMAKE_PREFIX_PATH "/usr/local/opt/qt5")
+endif()
+
+set(QT_LIBS Widgets)
+find_package(Qt5 COMPONENTS ${QT_LIBS} CONFIG REQUIRED)
+
+# Instruct CMake to run moc automatically when needed
+set(CMAKE_AUTOMOC ON)
+# Find includes in corresponding build directories
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+add_executable(qttxf WIN32 main.cpp  mainwindow.cpp)
+install(TARGETS qttxf RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+qt5_use_modules(qttxf ${QT_LIBS})