SCons

The Cons software construction utility, written in the Perl, was created by Bob Sidebotham in 1999.{{Citation | url = http://www.dsmit.com/cons/ | title = Cons | type = web site | publisher = DSMit | url-status = dead | archive-url = https://archive.today/20000815211359/http://www.dsmit.com/cons/ | archive-date = 2000-08-15 }}. It served as a base for the ScCons build tool, a design which won the Software Carpentry project SC Build competition in August 2000.{{cite web| url = https://lwn.net/2000/0810/a/sc-second-round.php3 |title= Software Carpentry Design Competition Second Round Results Config, Build, and Track categories|date=2000-08-04|first=Alex|last= Samuel|access-date= 2012-10-29}} ScCons was the foundation for SCons.

SCons inspired the creation of Waf, formerly known as SCons/BKsys, which emerged in the KDE community. For some time, there were plans to use it as the build tool for KDE 4 and beyond, but that effort was abandoned in favor of CMake.{{cite web|url=https://lwn.net/Articles/188693/|title=Why the KDE project switched to CMake – and how (continued)|last=Neundorf|first=Alexander|date=21 June 2006|publisher=LWN | access-date =21 July 2009}}

Notable projects that use SCons (or used it at one time) include: The Battle for Wesnoth,{{cite web| url = http://wiki.wesnoth.org/CompilingWesnoth#Building_with_SCons | title =CompilingWesnoth|access-date= 2011-04-11 | work = Wiki | publisher = Wesnoth}} Battlefield 1942,{{citation needed|date=March 2014}} Doom 3,{{cite web|url=https://github.com/id-Software/DOOM-3/blob/master/README.txt | publisher = id Software | title=README.txt | access-date= 2015-05-13}} gem5,{{Citation | url = http://www.gem5.org/ | title = Gem5}}. gpsd,{{cite web|url= http://esr.ibiblio.org/?p=3089| work = ESR | publisher = iBiblio | title= SCons is full of win today|date = 2011-04-05 | access-date=2011-04-11}} GtkRadiant,{{cite web| publisher = QE radiant | url= http://www.qeradiant.com/cgi-bin/trac.cgi/browser/GtkRadiant/trunk/COMPILING |title=Developer documentation for GtkRadiant 1.6.0 (Zeroradiant)| date= 2008-06-30 | format = Trac | access-date = 2009-12-28}} Madagascar,{{cite web | publisher = Ahay | work = Wiki | url= http://www.ahay.org/wiki/Installation#Installation_from_source |title= Installation|date = 2011-02-26 | access-date = 2011-04-11}} Nullsoft Scriptable Install System,{{cite web | url = http://nsis.svn.sourceforge.net/viewvc/nsis/NSIS/trunk/INSTALL?revision=6147&view=markup | archive-url = https://archive.today/20120711221146/http://nsis.svn.sourceforge.net/viewvc/nsis/NSIS/trunk/INSTALL?revision=6147&view=markup | url-status = dead | archive-date = 2012-07-11 | title = INSTALL | work = NSIS | type = source code | date = 2011-05-28 | access-date = 2011-04-11 | publisher = Source forge }} OpenNebula,{{cite web | url = http://dev.opennebula.org/projects/opennebula/repository/revisions/e20fb5c4c42960186cae7cdf353ba96e7a629703/entry/SConstruct | title = /SConstruct - OpenNebula - OpenNebula Development pages | publisher = OpenNebula Project | access-date= 2016-01-09}} VMware,{{citation needed|date=March 2014}}, Wolfenstein: Enemy Territory,{{cite web|url = https://github.com/id-Software/Enemy-Territory/blob/master/README.txt | publisher = id Software | title = README.txt | access-date = 2017-04-25}} XORP and MCA2,{{cite web|url= http://mca2.org/ |title= Modular Controller Architecture|publisher = Research Center for Information Technology (FZI), Karlsruhe Institute of Technology (KIT)}} openpilot{{Cite web|url=https://github.com/commaai/openpilot|title=openpilot Github repository|website=comma.ai/|access-date=2021-05-10}} and Godot.{{Cite web|url=https://docs.godotengine.org/en/3.1/development/compiling/introduction_to_the_buildsystem.html|title=Introduction to the buildsystem — Godot Engine latest documentation|website=docs.godotengine.org|access-date=2019-08-19}}

.csig is the SCons Content Signature file format.

Major features include:

• Configuration files are Python; user-written builds can leverage a general-purpose, cross-platform programming language
• Dependency analysis for C, C++ and Fortran
• Dependency analysis is extensible through user-defined scanners for other languages or file types; unlike GNU Compiler Collection (GCC) dependency analysis, SCons uses a regular expression scan for included source files
• Built-in support for C, C++, D, Java, Fortran, Objective-C, Yacc, Lex, Qt and SWIG, as well as TeX and LaTeX documents
• Support for other languages via custom builders
• Building from central repositories of source code and pre-built targets
• Ability to use Visual Studio, including the generation of {{Not a typo|.dsp}}, {{Not a typo|.dsw}}, {{Not a typo|.sln}} and {{Not a typo|.vcproj}} files
• Detection of file content changes using MD5 signatures; optional, configurable ability to use traditional timestamps
• Ability to do parallel builds, maintaining a specified number of jobs running simultaneously regardless of directory hierarchy
• Autoconf-like support for finding #include files, libraries, functions and typedefs
• Global view of dependencies, so multiple build passes or reordering targets is not required.
• Ability to share built files in a cache to speed up multiple builds - like ccache but for any type of target file, not just C/C++ compilation
• Designed from the ground up for cross-platform builds; known to work on POSIX systems (including Linux, AIX and OS/2, *BSD Unices, HP-UX, SGI IRIX, Solaris, illumos), Windows NT, OS X

The following is an SConstruct file that builds a hello world C program using the default platform compiler:

Program("hello-world.c")

The following is a SConstruct file for a project that includes two source files and specifies build tool options:

env = Environment()

env.Append(CPPFLAGS=["-Wall", "-g"])

env.Program("hello", ["hello.c", "main.c"])

{{Portal|Free and open-source software}}

• {{Annotated link|Buildout}}
• {{Annotated link|qmake}}
• {{Annotated link|Qbs (build tool)}}
• {{Annotated link|Premake}}
• {{Annotated link|List of build automation software}}

{{Reflist|30em}}

• {{Official website|www.scons.org}}

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Category:Articles with example Python (programming language) code

Category:Build automation

Category:Compiling tools

Category:Free software programmed in Python

Category:Software using the MIT license