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The qmake tool provides you with a project-oriented system for managing the build process for applications, libraries, and other components. This approach gives you control over the source files used, and allows each of the steps in the process to be described concisely, typically within a single file. qmake expands the information in each project file to a Makefile that executes the necessary commands for compiling and linking.
Projects are described by the contents of project (
.pro) files. qmake uses the information within the files to generate Makefiles that contain all the commands that are needed to build each project. Project
files typically contain a list of source and header files, general configuration information, and any application-specific details, such as a list of extra libraries to link against, or a list of extra include paths to use.
Project files can contain a number of different elements, including comments, variable declarations, built-in functions, and some simple control structures. In most simple projects, it is only necessary to declare the source and header files that are used to build the project with some basic configuration options. For more information about how to create a simple project file, see Getting Started.
You can create more sophisticated project files for complex projects. For an overview of project files, see Creating Project Files. For detailed information about the variables and functions that you can use in project files, see Reference.
You can use application or library project templates to specify specialized configuration options to fine tune the build process. For more information, see Building Common Project Types.
You can use the Qt Creator new project wizard to create the project file. You choose the project template, and Qt Creator creates a project file with default values that enable you to build and run the project. You can modify the project file to suit your purposes.
You can also use qmake to generate project files. For a full description of qmake command line options, see Running qmake.
The basic configuration features of qmake can handle most cross-platform projects. However, it might be useful, or even necessary, to use some platform-specific variables. For more information, see Platform Notes.
For simple projects, you only need to run qmake in the top level directory of your project to generate a Makefile. You can then run your platform's
make tool to build the project according to the Makefile.
For more information about the environment variables that qmake uses when configuring the build process, see Configuring qmake.
The guide to Third Party Libraries shows you how to use simple third party libraries in your Qt project.
In large projects, it is possible to take advantage of precompiled header files to speed up the build process. For more information, see Using Precompiled Headers.