Always compile the all versions of the hashlib algorithm modules when Python

was compiled with Py_DEBUG defined.  Otherwise the builtins are not compiled by
default for many developers due to OpenSSL being present, making it easier for
bugs to slip by.  A future commit will add test code compare the behaviors of
all implementations when they are all available.

setup.py

@@ -16,6 +16,9 @@ from distutils.command.build_ext import build_ext
 from distutils.command.install import install
 from distutils.command.install_lib import install_lib
 
+# Were we compiled --with-pydebug or with #define Py_DEBUG?
+COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount')
+
 # This global variable is used to hold the list of modules to be disabled.
 disabled_module_list = []
 
@@ -653,10 +656,12 @@ class PyBuildExt(build_ext):
                 break
 
         #print 'openssl_ver = 0x%08x' % openssl_ver
+        min_openssl_ver = 0x00907000
+        have_usable_openssl = (ssl_incs is not None and
+                               ssl_libs is not None and
+                               openssl_ver >= min_openssl_ver)
 
-        if (ssl_incs is not None and
-            ssl_libs is not None and
-            openssl_ver >= 0x00907000):
+        if have_usable_openssl:
             # The _hashlib module wraps optimized implementations
             # of hash functions from the OpenSSL library.
             exts.append( Extension('_hashlib', ['_hashopenssl.c'],
@@ -665,7 +670,7 @@ class PyBuildExt(build_ext):
                                    libraries = ['ssl', 'crypto']) )
             # these aren't strictly missing since they are unneeded.
             #missing.extend(['_sha', '_md5'])
-        else:
+        if COMPILED_WITH_PYDEBUG or not have_usable_openssl:
             # The _sha module implements the SHA1 hash algorithm.
             exts.append( Extension('_sha', ['shamodule.c']) )
             # The _md5 module implements the RSA Data Security, Inc. MD5
@@ -676,7 +681,8 @@ class PyBuildExt(build_ext):
                             depends = ['md5.h']) )
             missing.append('_hashlib')
 
-        if (openssl_ver < 0x00908000):
+        min_sha2_openssl_ver = 0x00908000
+        if COMPILED_WITH_PYDEBUG or openssl_ver < min_sha2_openssl_ver:
             # OpenSSL doesn't do these until 0.9.8 so we'll bring our own hash
             exts.append( Extension('_sha256', ['sha256module.c']) )
             exts.append( Extension('_sha512', ['sha512module.c']) )