message: Add a cmake option to override the name of the 'qmake' binary. Refs
diff: option(STATIC_QRENDERDOC "Compile qrenderdoc as static" OFF)
  option(QRENDERDOC_NO_CXX11_REGEX "Disable C++11 regex in scintilla" OFF)
  +set(QMAKE_QT5_COMMAND qmake CACHE STRING "Command to run to invoke Qt5's qmake. Normally this is qmake, possibly with qtchooser, but might be qmake-qt5")
  +
  set(QMAKE_CONFIG "debug")
  set(QMAKE_LDFLAGS "")
  set(QMAKE_CXXFLAGS "")
  @@ -199,7 +201,7 @@ endforeach()
  # which causes CMake to rerun this target every time so that Qt
  # can do dependency checking and rebuild anything necessary.
  add_custom_command(OUTPUT QRenderDoc
  - COMMAND qmake "CMAKE_DIR=${CMAKE_BINARY_DIR}" ${CMAKE_CURRENT_SOURCE_DIR}
  + COMMAND ${QMAKE_QT5_COMMAND} "CMAKE_DIR=${CMAKE_BINARY_DIR}" ${CMAKE_CURRENT_SOURCE_DIR}
  COMMAND $(MAKE)
  DEPENDS RenderDoc.icns
  DEPENDS ${swig_output})
  