This reference is a detailed index of all the variables and function that are available for use in qmake project files.
The qmake Variable Reference describes the variables that are recognized by qmake when configuring the build process for projects.
The qmake Function Reference describes the function that can be used to process the contents of variables defined in project files.
The following variables are frequently used in project files to describe common aspects of the build process. These are fully described in the Variable Reference.
The Configuring qmake's Environment chapter of this manual describes the environment variables that qmake uses when configuring the build process.