Add QT_VERSION_STR define to OpenShotVersion.h

The CMake process will pick up Qt's Qt5Core_VERSION_STRING and
stick it in a cache variable (with forced updating each run),
and a new `#define` in the header exports it to the library and
to the Python bindings so that it can be queried at runtime.

CMakeLists.txt

@@ -91,12 +91,6 @@ if(DEFINED ENABLE_TESTS)
   set(ENABLE_TESTS ${ENABLE_TESTS} CACHE BOOL "Build unit tests (requires UnitTest++)" FORCE)
 endif()
 
-########## Configure Version.h header ##############
-configure_file(include/OpenShotVersion.h.in include/OpenShotVersion.h @ONLY)
-# We'll want that installed later
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/include/OpenShotVersion.h
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/libopenshot)
-
 #### Work around a GCC < 9 bug with handling of _Pragma() in macros
 #### See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55578
 if ((${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU") AND
@@ -142,6 +136,12 @@ endif()
 ############## PROCESS src/ DIRECTORIES ##############
 add_subdirectory(src)
 
+########## Configure Version.h header ##############
+configure_file(include/OpenShotVersion.h.in include/OpenShotVersion.h @ONLY)
+# We'll want that installed later
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/include/OpenShotVersion.h
+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/libopenshot)
+
 ################### DOCUMENTATION ###################
 # Find Doxygen (used for documentation)
 set(DOCS_ENABLED FALSE) # Only set true if Doxygen is found and configured

include/OpenShotVersion.h.in

@@ -42,6 +42,9 @@
 
 #define OPENSHOT_VERSION_SO @PROJECT_SO_VERSION@         /// Shared object version number. This increments any time the API and ABI changes (so old apps will no longer link)
 
+// Useful dependency versioning
+#define QT_VERSION_STR "@QT_VERSION_STR@"
+
 #include <sstream>
 
 namespace openshot
@@ -67,4 +70,4 @@ namespace openshot
 	openshot::OpenShotVersion GetVersion();
 }
 
-#endif // OPENSHOT_VERSION_H
+#endif // OPENSHOT_VERSION_H

src/CMakeLists.txt

@@ -289,6 +289,10 @@ foreach(_qt_comp IN LISTS _qt_components)
   endif()
 endforeach()
 
+# Keep track of Qt version, to embed in our version header
+set(QT_VERSION_STR ${Qt5Core_VERSION_STRING} CACHE STRING "Qt version linked with" FORCE)
+mark_as_advanced(QT_VERSION_STR)
+
 ################### FFMPEG #####################
 # Find FFmpeg libraries (used for video encoding / decoding)
 find_package(FFmpeg REQUIRED COMPONENTS avcodec avdevice avformat avutil swscale)