I build a library. The generated Makefile contains:

DESTDIR       = ..\..\lib\arm7\#avoid trailing-slash linebreak
TARGET        = libcryptoppd.a

...

..\..\lib\arm7\$(TARGET):  $(OBJECTS) $(OBJCOMP) 
	@if not exist ..\..\lib\arm7\ mkdir ..\..\lib\arm7\ & if not exist ..\..\lib\arm7\ exit 1
	-$(DEL_FILE) $(TARGET)
	$(AR) $(TARGET) $(OBJECTS)
	$(RANLIB) $(TARGET)
	-$(DEL_FILE) ..\..\lib\arm7\$(TARGET)
	-$(MOVE) $(TARGET) ..\..\lib\arm7\ 

Everything works fine, until the MOVE that fails (file not found), or in more detail:

process_begin: CreateProcess(NULL, move libcryptoppd.a "..\..\lib\arm7 ", ...) failed.
make (e=2): The system cannot find the file specified.

Note:

• If you type the move command in a console, it works.
• It is broken either with QtCreator, or with command-line make.exe invocation

Writting the Makefile that way works:

DESTDIR       = ..\..\lib\arm7
...
$(DESTDIR)\$(TARGET):  $(OBJECTS) $(OBJCOMP) 
	@if not exist "$(DESTDIR)" mkdir "$(DESTDIR)" & if not exist "$(DESTDIR)" exit 1
	-$(DEL_FILE) "$(TARGET)"
	$(AR) "$(TARGET)" $(OBJECTS)
	$(RANLIB) "$(TARGET)"
	-$(DEL_FILE) "$(DESTDIR)\$(TARGET)"
	-$(MOVE) "$(TARGET)" "$(DESTDIR)"

Note:

• The # trick on the DESTDIR definition DOES NOT WORK, as any substitution will indeed include the comment in it !
• The "$(DESTDIR)" and "$(TARGET)" both need to be quoted, or they will broke if there is space in TARGET or the the destination path...

Hope this helps make Qt5.2 the great dev toll it desserve.