/usr/lib/petscdir/3.7.5/x86_64-linux-gnu-complex/bin/petsc_conf.py is in libpetsc-complex-3.7.5-dev 3.7.5+dfsg1-4+b1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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def get_conf():
"""Parses various PETSc configuration/include files to get data types.
precision, indices, complexscalars = get_conf()
Output:
precision: 'single', 'double', 'longlong' indicates precision of PetscScalar
indices: '32', '64' indicates bit-size of PetscInt
complex: True/False indicates whether PetscScalar is complex or not.
"""
import sys, os
precision = None
indices = None
complexscalars = None
if os.environ.has_key('PETSC_DIR'):
petscdir = os.environ['PETSC_DIR']
else:
warnings.warn('PETSC_DIR env not set - unable to locate PETSc installation, using defaults')
return None, None, None
if os.path.isfile(os.path.join(petscdir,'lib','petsc','conf','petscrules')):
# found prefix install
petscvariables = os.path.join(petscdir,'lib','petsc','conf','petscvariables')
petscconfinclude = os.path.join(petscdir,'include','petscconf.h')
else:
if os.environ.has_key('PETSC_ARCH'):
petscarch = os.environ['PETSC_ARCH']
if os.path.isfile(os.path.join(petscdir,petscarch,'lib','petsc','conf','petscrules')):
# found legacy install
petscvariables = os.path.join(petscdir,petscarch,'lib','petsc','conf','petscvariables')
petscconfinclude = os.path.join(petscdir,petscarch,'include','petscconf.h')
else:
warnings.warn('Unable to locate PETSc installation in specified PETSC_DIR/PETSC_ARCH, using defaults')
return None, None, None
else:
warnings.warn('PETSC_ARCH env not set or incorrect PETSC_DIR is given - unable to locate PETSc installation, using defaults')
return None, None, None
try:
fid = open(petscvariables, 'r')
except IOError:
warnings.warn('Nonexistent or invalid PETSc installation, using defaults')
return None, None, None
else:
for line in fid:
if line.startswith('PETSC_PRECISION'):
precision = line.strip().split('=')[1].strip('\n').strip()
fid.close()
try:
fid = open(petscconfinclude, 'r')
except IOError:
warnings.warn('Nonexistent or invalid PETSc installation, using defaults')
return None, None, None
else:
for line in fid:
if line.startswith('#define PETSC_USE_64BIT_INDICES 1'):
indices = '64bit'
elif line.startswith('#define PETSC_USE_COMPLEX 1'):
complexscalars = True
if indices is None:
indices = '32bit'
if complexscalars is None:
complexscalars = False
fid.close()
return precision, indices, complexscalars
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