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This file defines a set of system_info classes for getting
information about various resources (libraries, library directories,
include directories, etc.) in the system. Usage:
    info_dict = get_info(<name>)
  where <name> is a string 'atlas','x11','fftw','lapack','blas',
  'lapack_src', 'blas_src', etc. For a complete list of allowed names,
  see the definition of get_info() function below.

  Returned info_dict is a dictionary which is compatible with
  distutils.setup keyword arguments. If info_dict == {}, then the
  asked resource is not available (system_info could not find it).

  Several *_info classes specify an environment variable to specify
  the locations of software. When setting the corresponding environment
  variable to 'None' then the software will be ignored, even when it
  is available in system.

Global parameters:
  system_info.search_static_first - search static libraries (.a)
             in precedence to shared ones (.so, .sl) if enabled.
  system_info.verbosity - output the results to stdout if enabled.

The file 'site.cfg' is looked for in

1) Directory of main setup.py file being run.
2) Home directory of user running the setup.py file as ~/.numpy-site.cfg
3) System wide directory (location of this file...)

The first one found is used to get system configuration options The
format is that used by ConfigParser (i.e., Windows .INI style). The
section ALL is not intended for general use.

Appropriate defaults are used if nothing is specified.

The order of finding the locations of resources is the following:
 1. environment variable
 2. section in site.cfg
 3. DEFAULT section in site.cfg
 4. System default search paths (see ``default_*`` variables below).
Only the first complete match is returned.

Currently, the following classes are available, along with their section names:

    Numeric_info:Numeric
    _numpy_info:Numeric
    _pkg_config_info:None
    accelerate_info:accelerate
    accelerate_lapack_info:accelerate
    agg2_info:agg2
    amd_info:amd
    atlas_3_10_blas_info:atlas
    atlas_3_10_blas_threads_info:atlas
    atlas_3_10_info:atlas
    atlas_3_10_threads_info:atlas
    atlas_blas_info:atlas
    atlas_blas_threads_info:atlas
    atlas_info:atlas
    atlas_threads_info:atlas
    blas64__opt_info:ALL               # usage recommended (general ILP64 BLAS, 64_ symbol suffix)
    blas_ilp64_opt_info:ALL            # usage recommended (general ILP64 BLAS)
    blas_ilp64_plain_opt_info:ALL      # usage recommended (general ILP64 BLAS, no symbol suffix)
    blas_info:blas
    blas_mkl_info:mkl
    blas_ssl2_info:ssl2
    blas_opt_info:ALL                  # usage recommended
    blas_src_info:blas_src
    blis_info:blis
    boost_python_info:boost_python
    dfftw_info:fftw
    dfftw_threads_info:fftw
    djbfft_info:djbfft
    f2py_info:ALL
    fft_opt_info:ALL
    fftw2_info:fftw
    fftw3_info:fftw3
    fftw_info:fftw
    fftw_threads_info:fftw
    flame_info:flame
    freetype2_info:freetype2
    gdk_2_info:gdk_2
    gdk_info:gdk
    gdk_pixbuf_2_info:gdk_pixbuf_2
    gdk_pixbuf_xlib_2_info:gdk_pixbuf_xlib_2
    gdk_x11_2_info:gdk_x11_2
    gtkp_2_info:gtkp_2
    gtkp_x11_2_info:gtkp_x11_2
    lapack64__opt_info:ALL             # usage recommended (general ILP64 LAPACK, 64_ symbol suffix)
    lapack_atlas_3_10_info:atlas
    lapack_atlas_3_10_threads_info:atlas
    lapack_atlas_info:atlas
    lapack_atlas_threads_info:atlas
    lapack_ilp64_opt_info:ALL          # usage recommended (general ILP64 LAPACK)
    lapack_ilp64_plain_opt_info:ALL    # usage recommended (general ILP64 LAPACK, no symbol suffix)
    lapack_info:lapack
    lapack_mkl_info:mkl
    lapack_ssl2_info:ssl2
    lapack_opt_info:ALL                # usage recommended
    lapack_src_info:lapack_src
    mkl_info:mkl
    ssl2_info:ssl2
    numarray_info:numarray
    numerix_info:numerix
    numpy_info:numpy
    openblas64__info:openblas64_
    openblas64__lapack_info:openblas64_
    openblas_clapack_info:openblas
    openblas_ilp64_info:openblas_ilp64
    openblas_ilp64_lapack_info:openblas_ilp64
    openblas_info:openblas
    openblas_lapack_info:openblas
    sfftw_info:fftw
    sfftw_threads_info:fftw
    system_info:ALL
    umfpack_info:umfpack
    wx_info:wx
    x11_info:x11
    xft_info:xft

Note that blas_opt_info and lapack_opt_info honor the NPY_BLAS_ORDER
and NPY_LAPACK_ORDER environment variables to determine the order in which
specific BLAS and LAPACK libraries are searched for.

This search (or autodetection) can be bypassed by defining the environment
variables NPY_BLAS_LIBS and NPY_LAPACK_LIBS, which should then contain the
exact linker flags to use (language will be set to F77). Building against
Netlib BLAS/LAPACK or stub files, in order to be able to switch BLAS and LAPACK
implementations at runtime. If using this to build NumPy itself, it is
recommended to also define NPY_CBLAS_LIBS (assuming your BLAS library has a
CBLAS interface) to enable CBLAS usage for matrix multiplication (unoptimized
otherwise).

Example:
----------
[DEFAULT]
# default section
library_dirs = /usr/lib:/usr/local/lib:/opt/lib
include_dirs = /usr/include:/usr/local/include:/opt/include
src_dirs = /usr/local/src:/opt/src
# search static libraries (.a) in preference to shared ones (.so)
search_static_first = 0

[fftw]
libraries = rfftw, fftw

[atlas]
library_dirs = /usr/lib/3dnow:/usr/lib/3dnow/atlas
# for overriding the names of the atlas libraries
libraries = lapack, f77blas, cblas, atlas

[x11]
library_dirs = /usr/X11R6/lib
include_dirs = /usr/X11R6/include
----------

Note that the ``libraries`` key is the default setting for libraries.

Authors:
  Pearu Peterson <pearu@cens.ioc.ee>, February 2002
  David M. Cooke <cookedm@physics.mcmaster.ca>, April 2002

Copyright 2002 Pearu Peterson all rights reserved,
Pearu Peterson <pearu@cens.ioc.ee>
Permission to use, modify, and distribute this software is given under the
terms of the NumPy (BSD style) license.  See LICENSE.txt that came with
this distribution for specifics.

NO WARRANTY IS EXPRESSED OR IMPLIED.  USE AT YOUR OWN RISK.

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