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CMake have special variable ${QT_DEFINITIONS} for Qt4 which contains qt defines such as QT_NO_DEBUG and QT_DEBUG. There is no such option for Qt5.

How can I add standard Qt5 defines in cmake?

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Please check <component>_DEFINITIONS / <component>_COMPILE_DEFINITIONS.

There's an example using Qt Widgets and CMake here. The two essential parts:

# Find the QtWidgets library find_package(Qt5Widgets) # Add the include directories for the Qt 5 Widgets module to # the compile lines. include_directories(${Qt5Widgets_INCLUDE_DIRS})

Calling find_package() will set those variables for you:

  • Qt5Widgets_VERSION_STRING
  • Qt5Widgets_LIBRARIES List of libraries for use with the target_link_libraries command, for example.
  • Qt5Widgets_INCLUDE_DIRS List of libraries for use with the include_directories command, for example.
  • Qt5Widgets_DEFINITIONS List of definitions for use with add_definitions, for example.
  • Qt5Widgets_COMPILE_DEFINITIONS List of definitions for use with the COMPILE_DEFINITIONS target property.
  • Qt5Widgets_FOUND Boolean describing whether the module was found successfully.
  • Qt5Widgets_EXECUTABLE_COMPILE_FLAGS String of flags to be used when building executables.

(Quoted from link above; the name depends on what you search in your find_package() call)

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3 Comments

Unfortunately none of these variables have QT_NO_DEBUG. As a workaround I will add QT_NO_DEUBG, QT_DEBUG manually. These defies are required to make proper QtDesigner plugin.
What version of CMake are you using? 2.8+? (if not, please test this version).
Thx for pointing me out on CMake bugtracker. I was using 2.8.11 and it looks like they have just released new version.

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