Author: Drew Parsons <dparsons@debian.org>
Forwarded: not-needed
Description: teach the wrap-swig demo to use PETSC_LIB_EXT, enabling use with petsc64.

Applies also to wrap-cython, but the same trick doesn't fix wrap-f2py

Index: petsc4py/demo/legacy/wrap-swig/setup.py
===================================================================
--- petsc4py.orig/demo/legacy/wrap-swig/setup.py	2023-01-08 20:28:44.754798414 +0100
+++ petsc4py/demo/legacy/wrap-swig/setup.py	2023-01-08 20:28:44.750798381 +0100
@@ -24,7 +24,15 @@
     import os
     PETSC_DIR  = os.environ['PETSC_DIR']
     PETSC_ARCH = os.environ.get('PETSC_ARCH', '')
+    PETSC_LIB_EXT = os.environ.get('PETSC_LIB_EXT', '')
     from os.path import join, isdir
+    if not PETSC_LIB_EXT:
+        from configparser import ConfigParser
+        parser = ConfigParser()
+        petscvariables = join(PETSC_DIR, PETSC_ARCH, 'lib/petsc/conf/petscvariables')
+        with open(petscvariables) as stream: # waiting for https://github.com/python/cpython/pull/2735 to avoid this step
+            parser.read_string("[petscvariables]\n" + stream.read())
+        PETSC_LIB_EXT = parser['petscvariables'].get('PETSC_LIB_EXT','')
     if PETSC_ARCH and isdir(join(PETSC_DIR, PETSC_ARCH)):
         INCLUDE_DIRS += [join(PETSC_DIR, PETSC_ARCH, 'include'),
                          join(PETSC_DIR, 'include')]
@@ -36,6 +44,8 @@
     LIBRARIES += [#'petscts', 'petscsnes', 'petscksp',
                   #'petscdm', 'petscmat',  'petscvec',
                   'petsc']
+    if PETSC_LIB_EXT:
+        LIBRARIES = [lib+PETSC_LIB_EXT for lib in LIBRARIES]
 
     # PETSc for Python
     import petsc4py
Index: petsc4py/demo/legacy/wrap-cython/setup.py
===================================================================
--- petsc4py.orig/demo/legacy/wrap-cython/setup.py	2021-04-19 22:57:36.065972153 +0200
+++ petsc4py/demo/legacy/wrap-cython/setup.py	2023-01-08 20:30:26.899626904 +0100
@@ -18,7 +18,15 @@
     import os
     PETSC_DIR  = os.environ['PETSC_DIR']
     PETSC_ARCH = os.environ.get('PETSC_ARCH', '')
+    PETSC_LIB_EXT = os.environ.get('PETSC_LIB_EXT', '')
     from os.path import join, isdir
+    if not PETSC_LIB_EXT:
+        from configparser import ConfigParser
+        parser = ConfigParser()
+        petscvariables = join(PETSC_DIR, PETSC_ARCH, 'lib/petsc/conf/petscvariables')
+        with open(petscvariables) as stream: # waiting for https://github.com/python/cpython/pull/2735 to avoid this step
+            parser.read_string("[petscvariables]\n" + stream.read())
+        PETSC_LIB_EXT = parser['petscvariables'].get('PETSC_LIB_EXT','')
     if PETSC_ARCH and isdir(join(PETSC_DIR, PETSC_ARCH)):
         INCLUDE_DIRS += [join(PETSC_DIR, PETSC_ARCH, 'include'),
                          join(PETSC_DIR, 'include')]
@@ -27,7 +35,7 @@
         if PETSC_ARCH: pass # XXX should warn ...
         INCLUDE_DIRS += [join(PETSC_DIR, 'include')]
         LIBRARY_DIRS += [join(PETSC_DIR, 'lib')]
-    LIBRARIES += ['petsc']
+    LIBRARIES += ['petsc'+PETSC_LIB_EXT]
 
     # PETSc for Python
     INCLUDE_DIRS += [petsc4py.get_include()]