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64 lines
3.2 KiB
Markdown
64 lines
3.2 KiB
Markdown
## ABOUT WAF
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Waf is a Python-based framework for configuring, compiling and installing applications. Here are perhaps the most important features of Waf:
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* *Automatic build order*: the build order is computed from input and output files, among others
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* *Automatic dependencies*: tasks to execute are detected by hashing files and commands
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* *Performance*: tasks are executed in parallel automatically, the startup time is meant to be fast (separation between configuration and build)
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* *Flexibility*: new commands and tasks can be added very easily through subclassing, bottlenecks for specific builds can be eliminated through dynamic method replacement
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* *Extensibility*: though many programming languages and compilers are already supported by default, many others are available as extensions
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* *IDE support*: Eclipse, Visual Studio and Xcode project generators (`waflib/extras/`)
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* *Documentation*: the application is based on a robust model documented in [The Waf Book](https://waf.io/book/) and in the [API docs](https://waf.io/apidocs/)
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* *Python compatibility*: cPython 2.5 to 3.x, Jython 2.5, IronPython, and Pypy
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Waf is used in particular by innovative companies such as [Avalanche Studios](http://www.avalanchestudios.se) and by open-source projects such as [RTEMS](https://www.rtems.org/). Learn more about Waf by reading [The Waf Book](https://waf.io/book/).
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For researchers and build system writers, Waf also provides a framework for creating [custom build systems](https://gitlab.com/ita1024/waf/tree/master/build_system_kit) and [package distribution systems](https://gitlab.com/ita1024/waf/blob/master/playground/distnet/README.rst).
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Download the project from our page on [waf.io](https://waf.io/) or from a mirror on [freehackers.org](http://www.freehackers.org/~tnagy/release/), consult the [manual](https://waf.io/book/), the [API documentation](https://waf.io/apidocs/) and the [showcases](https://gitlab.com/ita1024/waf/tree/master/demos) and [experiments](https://gitlab.com/ita1024/waf/tree/master/playground).
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## HOW TO CREATE THE WAF SCRIPT
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Python >= 2.6 is required to generate the waf script, and the resulting file can then run on Python 2.5.
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Just run:
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```sh
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$ python ./waf-light configure build
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```
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Or, if several python versions are installed:
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```sh
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$ python3 ./waf-light configure build
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```
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## CUSTOMIZATION
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The Waf tools in waflib/extras are not added to the waf script. To add
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some of them, use the --tools switch. An absolute path can be passed
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if the module does not exist under the 'extras' folder:
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```sh
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$ ./waf-light --tools=swig
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```
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To customize the initialization, pass the parameter 'prelude'. Here is for example
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how to create a waf file using the compat15 module:
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```sh
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$ ./waf-light --tools=compat15 --prelude=$'\tfrom waflib.extras import compat15\n'
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```
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Although any kind of initialization is possible, using the build system kit
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may be easier (folder build\_system\_kit):
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```sh
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$ ./waf-light --make-waf --tools=compat15,/comp/waf/aba.py --prelude=$'\tfrom waflib.extras import compat15\n\tprint("ok")'
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```
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To avoid regenerating the waf file all the time, just set the `WAFDIR` environment variable to the directory containing "waflib".
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## HOW TO RUN THE EXAMPLES
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Try this:
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```sh
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cp waf demos/c/
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cd demos/c/
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./waf configure build
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```
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