ENH: linalg: Cythonize id_dist FORTRAN code

scipy/linalg/interpolative.py

@@ -385,7 +385,7 @@
 
 """
 
-import scipy.linalg._interpolative_backend as _backend
+import scipy.linalg._decomp_interpolative as _backend
 import numpy as np
 import sys
 

scipy/linalg/meson.build

@@ -111,57 +111,13 @@ py3.extension_module('_flapack',
 
 # TODO: cblas/clapack are built *only* for ATLAS. Why? Is it still needed?
 
-# id_dist contains a copy of FFTPACK, which has type mismatch warnings
-# that are hard to fix. This code is terrible and noisy during the build,
-# silence it completely.
-_suppress_all_warnings = ff.get_supported_arguments('-w')
-
-py3.extension_module('_interpolative',
-  [
-    'src/id_dist/src/dfft.f',
-    'src/id_dist/src/id_rand.f',
-    'src/id_dist/src/id_rtrans.f',
-    'src/id_dist/src/idd_frm.f',
-    'src/id_dist/src/idd_house.f',
-    'src/id_dist/src/idd_id.f',
-    'src/id_dist/src/idd_id2svd.f',
-    'src/id_dist/src/idd_qrpiv.f',
-    'src/id_dist/src/idd_sfft.f',
-    'src/id_dist/src/idd_snorm.f',
-    'src/id_dist/src/idd_svd.f',
-    'src/id_dist/src/iddp_aid.f',
-    'src/id_dist/src/iddp_asvd.f',
-    'src/id_dist/src/iddp_rid.f',
-    'src/id_dist/src/iddp_rsvd.f',
-    'src/id_dist/src/iddr_aid.f',
-    'src/id_dist/src/iddr_asvd.f',
-    'src/id_dist/src/iddr_rid.f',
-    'src/id_dist/src/iddr_rsvd.f',
-    'src/id_dist/src/idz_frm.f',
-    'src/id_dist/src/idz_house.f',
-    'src/id_dist/src/idz_id.f',
-    'src/id_dist/src/idz_id2svd.f',
-    'src/id_dist/src/idz_qrpiv.f',
-    'src/id_dist/src/idz_sfft.f',
-    'src/id_dist/src/idz_snorm.f',
-    'src/id_dist/src/idz_svd.f',
-    'src/id_dist/src/idzp_aid.f',
-    'src/id_dist/src/idzp_asvd.f',
-    'src/id_dist/src/idzp_rid.f',
-    'src/id_dist/src/idzp_rsvd.f',
-    'src/id_dist/src/idzr_aid.f',
-    'src/id_dist/src/idzr_asvd.f',
-    'src/id_dist/src/idzr_rid.f',
-    'src/id_dist/src/idzr_rsvd.f',
-    'src/id_dist/src/prini.f',
-    f2py_gen.process('interpolative.pyf'),
-  ],
-  fortran_args: [fortran_ignore_warnings, _suppress_all_warnings],
+# _decomp_interpolative
+py3.extension_module('_decomp_interpolative',
+  linalg_init_cython_gen.process('_decomp_interpolative.pyx'),
+  c_args: cython_c_args,
+  dependencies: np_dep,
   link_args: version_link_args,
-  dependencies: [lapack_dep, fortranobject_dep],
-  override_options: ['b_lto=false'],
   install: true,
-  link_language: 'fortran',
   subdir: 'scipy/linalg'
 )