This is documentation for an old release of SciPy (version 1.5.0). Read this page Search for this page in the documentation of the latest stable release (version 1.15.1).

Building from sources

Note

If you are only trying to install SciPy, see Installing and upgrading.

Build instructions for different operating systems and an FAQ:

• Building from source on Linux
  • Generic instructions
  • Specific instructions
  • Fortran ABI mismatch
• Building from source on Windows
  • Overview
  • Building the Released SciPy
  • Building Against an Older NumPy Version
  • Additional Resources
• Building from source on Mac OSX
  • Python
  • Compilers (C/C++/FORTRAN/Cython)
  • BLAS/LAPACK Installation
  • Version-specific notes
  • Obtaining and Building NumPy and SciPy
• Build/Install FAQ

Reference for build options

Scipy has several tunable build-time options, which can be set.

• site.cfg: build-time library configuration file, see site.cfg.example for details.

• Environment variables NPY_LAPACK_ORDER, NPY_BLAS_ORDER, OPENBLAS, ATLAS, etc., also controlling library configuration. See Numpy documentation for more details.

• Environment variable NPY_USE_BLAS_ILP64=1: build using 64-bit integer size (ILP64) BLAS+LAPACK libraries.

  Note that even when this is set, Scipy requires also 32-bit integer size (LP64) BLAS+LAPACK libraries to be available and configured. This is because only some components in Scipy make use of the 64-bit capabilities.