SCons. SCons is a software development tool that analyzes source code dependencies and operating system adaptation requirements from a software project description and generates final binary executables for installation on the target operating system platform. Its function is similar to the more popular GNU build system.

The tool generates Python scripts for project configuration and build logic.

History 
The Cons software construction utility, written in the Perl, was created by Bob Sidebotham in 1999. It served as a base for the ScCons build tool, a design which won the Software Carpentry project SC Build competition in August 2000.  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.

Notable projects that use SCons (or used it at one time) include: The Battle for Wesnoth, Battlefield 1942, Doom 3, FCEUX, gem5, gpsd, GtkRadiant, Madagascar, Mixxx, MongoDB, Nullsoft Scriptable Install System, OpenNebula, VMware,, Wolfenstein: Enemy Territory, XORP and MCA2, openpilot and Godot.

.csig is the SCons Content Signature file format.

Features 
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 , ,  and  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

Examples 

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"])

See also

References

External links 
 

Articles with example Python (programming language) code
Build automation
Compiling tools
Free software programmed in Python
Software using the MIT license