* DEFINES:qmake adds the values of this variable as compiler C preprocessor macros (-D option).
* DEPENDPATH:Specifies a list of directories for qmake to scan, to resolve dependencies.
* HEADERS:Defines the header files for the project.
* INCLUDEPATH:Specifies the #include directories which should be searched when compiling the project.
* LIBS:Specifies a list of libraries to be linked into the project.
* OUT_PWD:Specifies the full path leading to the directory where qmake places the generated Makefile.
* PWD:Specifies the full path leading to the directory containing the current file being parsed.
* QMAKE_RPATHDIR(Unix only):Specifies a list of library paths that are added to the executable at link time so that the paths will be preferentially searched at runtime.
* QT:Specifies the Qt modules that are used by your project.
* SOURCES:Specifies the names of all source files in the project.
* TARGET:Specifies the name of the target file. Contains the base name of the project file by default.
* TEMPLATE:Specifies the name of the template to use when generating the project.