What Makes SCons Better Than Make?

Updated

SCons is an open source software construction tool that positions itself as an improved, cross-platform substitute for the classic Make utility, with integrated functionality similar to autoconf/automake and compiler caches such as ccache. According to scons.org, it is "an easier, more reliable and faster way to build software." The comparison below applies if you are building software on Linux, other POSIX systems, Windows 7/8/10, macOS, or OS/2, and want a build tool whose configuration files are real Python scripts rather than Make's own syntax.

How SCons differs from Make

Configuration is Python, not Make syntax

SCons configuration files are Python scripts, so you can use the full power of a real programming language to solve build problems. With Make, complex logic usually means shell escapes, recursive make invocations, and custom macros. With SCons, that logic is ordinary Python.

Dependency analysis is built in

SCons includes reliable, automatic dependency analysis for C, C++, and Fortran. The site states this removes the need for make depend or make clean to get all dependencies right. Dependency analysis is also extensible through user-defined dependency Scanners for other languages or file types.

Change detection uses MD5 signatures

SCons detects build changes using MD5 signatures, with optional, configurable support for traditional timestamps. Make relies on timestamps by default, which can trigger unnecessary rebuilds or miss changes depending on how files are touched.

Parallel builds keep N jobs running

SCons supports parallel builds—like make -j, but it keeps N jobs running simultaneously regardless of directory hierarchy. With Make, parallelism can stall when the dependency graph has uneven branches.

A shared build cache speeds up repeated builds

SCons can share built files in a cache to speed up multiple builds—described as similar to ccache, but for any type of target file, not just C/C++ compilation.

Feature comparison at a glance

Dimension SCons Make
Configuration language Python scripts Makefile syntax
Dependency analysis Built-in, automatic for C, C++, Fortran; extensible via Scanners Typically manual (make depend) or external tooling
Change detection MD5 signatures by default; optional timestamps Timestamps by default
Parallel builds Keeps N jobs running regardless of directory hierarchy make -j, can stall on uneven graphs
Build cache Shared cache for any target file type Not built in (ccache covers C/C++ compilation only)
Autoconf-like checks Integrated support for finding #include files, libraries, functions, typedefs Separate autoconf/automake toolchain
Global dependency view Yes—no multiple build passes or target reordering Requires careful ordering and multiple passes
Cross-platform design Built from the ground up; known to work on Linux, POSIX systems (AIX, BSD, HP/UX, IRIX, Solaris), Windows 7/8/10, macOS, OS/2 Widely available, but platform quirks are common

Built-in language and tool support

SCons ships with built-in support for C, C++, D, Java, Fortran, Yacc, Lex, Qt, and SWIG, plus building TeX and LaTeX documents. It also includes built-in support for Microsoft Visual Studio, including generation of .dsp, .dsw, .sln, and .vcproj files. Other languages or file types can be added through user-defined Builders.

When SCons is the better choice

Choose SCons when:

  • Your build logic is complex enough that Python would express it more clearly than Makefile syntax.
  • You build C, C++, or Fortran and want dependency handling without make depend/make clean steps.
  • You want parallel builds that stay saturated across a deep or uneven directory tree.
  • You rebuild the same targets often and want a shared cache for all target types.
  • You need one build description to work across Linux, Windows, macOS, and other supported platforms.

Stick with Make when your project is small, your Makefiles are already stable, and you depend on tooling or workflows built specifically around Make.

Where SCons came from

SCons began as the ScCons build tool design, which won the Software Carpentry SC Build competition in August 2000. That design was based on the Cons software construction utility. The project was subsequently renamed SCons.