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 macOS
  • Python
  • Compilers (C/C++/FORTRAN/Cython/Pythran)
  • 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.