diff -up Python-2.7.3/configure.ac.debug-build Python-2.7.3/configure.ac

--- Python-2.7.3/configure.ac.debug-build	2012-04-18 19:46:22.066498521 -0400

+++ Python-2.7.3/configure.ac	2012-04-18 19:46:22.078498372 -0400

@@ -635,7 +635,7 @@ AC_SUBST(LIBRARY)

 AC_MSG_CHECKING(LIBRARY)

 if test -z "$LIBRARY"

 then

-	LIBRARY='libpython$(VERSION).a'

+	LIBRARY='libpython$(VERSION)$(DEBUG_EXT).a'

 fi

 AC_MSG_RESULT($LIBRARY)

@@ -780,8 +780,8 @@ if test $enable_shared = "yes"; then

 	  INSTSONAME="$LDLIBRARY".$SOVERSION

           ;;

     Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*|OpenBSD*)

-	  LDLIBRARY='libpython$(VERSION).so'

-	  BLDLIBRARY='-L. -lpython$(VERSION)'

+	  LDLIBRARY='libpython$(VERSION)$(DEBUG_EXT).so'

+	  BLDLIBRARY='-L. -lpython$(VERSION)$(DEBUG_EXT)'

 	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}

 	  case $ac_sys_system in

 	      FreeBSD*)

@@ -905,6 +905,14 @@ else AC_MSG_RESULT(no); Py_DEBUG='false'

 fi],

 [AC_MSG_RESULT(no)])

+if test "$Py_DEBUG" = 'true'

+then

+	DEBUG_EXT=_d

+	DEBUG_SUFFIX=-debug

+fi

+AC_SUBST(DEBUG_EXT)

+AC_SUBST(DEBUG_SUFFIX)

+

 # XXX Shouldn't the code above that fiddles with BASECFLAGS and OPT be

 # merged with this chunk of code?

diff -up Python-2.7.3/Lib/distutils/command/build_ext.py.debug-build Python-2.7.3/Lib/distutils/command/build_ext.py

--- Python-2.7.3/Lib/distutils/command/build_ext.py.debug-build	2012-04-09 19:07:29.000000000 -0400

+++ Python-2.7.3/Lib/distutils/command/build_ext.py	2012-04-18 19:46:22.079498360 -0400

@@ -676,7 +676,10 @@ class build_ext (Command):

         so_ext = get_config_var('SO')

         if os.name == 'nt' and self.debug:

             return os.path.join(*ext_path) + '_d' + so_ext

-        return os.path.join(*ext_path) + so_ext

+

+        # Similarly, extensions in debug mode are named 'module_d.so', to

+        # avoid adding the _d to the SO config variable:

+        return os.path.join(*ext_path) + (sys.pydebug and "_d" or "") + so_ext

     def get_export_symbols (self, ext):

         """Return the list of symbols that a shared extension has to

@@ -761,6 +764,8 @@ class build_ext (Command):

                 template = "python%d.%d"

                 pythonlib = (template %

                              (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))

+                if sys.pydebug:

+                    pythonlib += '_d'

                 return ext.libraries + [pythonlib]

             else:

                 return ext.libraries

diff -up Python-2.7.3/Lib/distutils/sysconfig.py.debug-build Python-2.7.3/Lib/distutils/sysconfig.py

--- Python-2.7.3/Lib/distutils/sysconfig.py.debug-build	2012-04-18 19:46:21.988499499 -0400

+++ Python-2.7.3/Lib/distutils/sysconfig.py	2012-04-18 19:46:22.080498348 -0400

@@ -85,7 +85,8 @@ def get_python_inc(plat_specific=0, pref

                 # Include is located in the srcdir

                 inc_dir = os.path.join(srcdir, "Include")

             return inc_dir

-        return os.path.join(prefix, "include", "python" + get_python_version())

+        return os.path.join(prefix, "include",

+                            "python" + get_python_version() + (sys.pydebug and '-debug' or ''))

     elif os.name == "nt":

         return os.path.join(prefix, "include")

     elif os.name == "os2":

@@ -250,7 +251,7 @@ def get_makefile_filename():

     if python_build:

         return os.path.join(project_base, "Makefile")

     lib_dir = get_python_lib(plat_specific=1, standard_lib=1)

-    return os.path.join(lib_dir, "config", "Makefile")

+    return os.path.join(lib_dir, "config" + (sys.pydebug and "-debug" or ""), "Makefile")

 def parse_config_h(fp, g=None):

diff -up Python-2.7.3/Lib/distutils/tests/test_install.py.debug-build Python-2.7.3/Lib/distutils/tests/test_install.py

--- Python-2.7.3/Lib/distutils/tests/test_install.py.debug-build	2012-04-18 19:46:21.997499385 -0400

+++ Python-2.7.3/Lib/distutils/tests/test_install.py	2012-04-18 19:46:22.080498348 -0400

@@ -20,8 +20,9 @@ from distutils.tests import support

 def _make_ext_name(modname):

-    if os.name == 'nt' and sys.executable.endswith('_d.exe'):

+    if sys.pydebug:

         modname += '_d'

+    

     return modname + sysconfig.get_config_var('SO')

diff -up Python-2.7.3/Makefile.pre.in.debug-build Python-2.7.3/Makefile.pre.in

--- Python-2.7.3/Makefile.pre.in.debug-build	2012-04-18 19:46:22.073498437 -0400

+++ Python-2.7.3/Makefile.pre.in	2012-04-18 19:48:46.336694896 -0400

@@ -102,8 +102,8 @@ SCRIPTDIR=	$(prefix)/lib64

 # Detailed destination directories

 BINLIBDEST=	$(LIBDIR)/python$(VERSION)

 LIBDEST=	$(SCRIPTDIR)/python$(VERSION)

-INCLUDEPY=	$(INCLUDEDIR)/python$(VERSION)

-CONFINCLUDEPY=	$(CONFINCLUDEDIR)/python$(VERSION)

+INCLUDEPY=	$(INCLUDEDIR)/python$(VERSION)$(DEBUG_SUFFIX)

+CONFINCLUDEPY=	$(CONFINCLUDEDIR)/python$(VERSION)$(DEBUG_SUFFIX)

 LIBP=		$(LIBDIR)/python$(VERSION)

 # Symbols used for using shared libraries

@@ -117,6 +117,12 @@ DESTSHARED=	$(BINLIBDEST)/lib-dynload

 EXE=		@EXEEXT@

 BUILDEXE=	@BUILDEXEEXT@

+# DEBUG_EXT is used by ELF files (names and SONAMEs); it will be "_d" for a debug build

+# DEBUG_SUFFIX is used by filesystem paths; it will be "-debug" for a debug build

+# Both will be empty in an optimized build

+DEBUG_EXT=	@DEBUG_EXT@

+DEBUG_SUFFIX=	@DEBUG_SUFFIX@

+

 # Short name and location for Mac OS X Python framework

 UNIVERSALSDK=@UNIVERSALSDK@

 PYTHONFRAMEWORK=	@PYTHONFRAMEWORK@

@@ -180,8 +186,8 @@ LIBOBJDIR=	Python/

 LIBOBJS=	@LIBOBJS@

 UNICODE_OBJS=   @UNICODE_OBJS@

-PYTHON=		python$(EXE)

-BUILDPYTHON=	python$(BUILDEXE)

+PYTHON=		python$(DEBUG_SUFFIX)$(EXE)

+BUILDPYTHON=	python$(DEBUG_SUFFIX)$(BUILDEXE)

 PYTHON_FOR_BUILD=@PYTHON_FOR_BUILD@

 _PYTHON_HOST_PLATFORM=@_PYTHON_HOST_PLATFORM@

@@ -413,7 +419,7 @@ sharedmods: $(BUILDPYTHON)

 	$(RUNSHARED) CC='$(CC)' LDSHARED='$(BLDSHARED)' OPT='$(OPT)' \

 		$(PYTHON_FOR_BUILD) $(srcdir)/setup.py $$quiet build

-libpython$(VERSION).so: $(LIBRARY_OBJS)

+libpython$(VERSION)$(DEBUG_EXT).so: $(LIBRARY_OBJS)

 	if test $(INSTSONAME) != $(LDLIBRARY); then \

 		$(BLDSHARED) -Wl,-h$(INSTSONAME) -o $(INSTSONAME) $(LIBRARY_OBJS) $(MODLIBS) $(SHLIBS) $(LIBC) $(LIBM) $(LDLAST); \

 		$(LN) -f $(INSTSONAME) $@; \

@@ -796,18 +802,18 @@ bininstall:	altbininstall

 	then rm -f $(DESTDIR)$(BINDIR)/$(PYTHON); \

 	else true; \

 	fi

-	(cd $(DESTDIR)$(BINDIR); $(LN) -s python2$(EXE) $(PYTHON))

-	-rm -f $(DESTDIR)$(BINDIR)/python2$(EXE)

-	(cd $(DESTDIR)$(BINDIR); $(LN) -s python$(VERSION)$(EXE) python2$(EXE))

-	-rm -f $(DESTDIR)$(BINDIR)/python2-config

-	(cd $(DESTDIR)$(BINDIR); $(LN) -s python$(VERSION)-config python2-config)

-	-rm -f $(DESTDIR)$(BINDIR)/python-config

-	(cd $(DESTDIR)$(BINDIR); $(LN) -s python2-config python-config)

+	(cd $(DESTDIR)$(BINDIR); $(LN) -s python2$(DEBUG_SUFFIX)$(EXE) $(PYTHON))

+	-rm -f $(DESTDIR)$(BINDIR)/python2$(DEBUG_SUFFIX)$(EXE)

+	(cd $(DESTDIR)$(BINDIR); $(LN) -s python$(VERSION)$(DEBUG_SUFFIX)$(EXE) python2$(DEBUG_SUFFIX)$(EXE))

+	-rm -f $(DESTDIR)$(BINDIR)/python2$(DEBUG_SUFFIX)-config

+	(cd $(DESTDIR)$(BINDIR); $(LN) -s python$(VERSION)$(DEBUG_SUFFIX)-config python2$(DEBUG_SUFFIX)-config)

+	-rm -f $(DESTDIR)$(BINDIR)/python$(DEBUG_SUFFIX)-config

+	(cd $(DESTDIR)$(BINDIR); $(LN) -s python2$(DEBUG_SUFFIX)-config python$(DEBUG_SUFFIX)-config)

 	-test -d $(DESTDIR)$(LIBPC) || $(INSTALL) -d -m $(DIRMODE) $(DESTDIR)$(LIBPC)

-	-rm -f $(DESTDIR)$(LIBPC)/python2.pc

-	(cd $(DESTDIR)$(LIBPC); $(LN) -s python-$(VERSION).pc python2.pc)

-	-rm -f $(DESTDIR)$(LIBPC)/python.pc

-	(cd $(DESTDIR)$(LIBPC); $(LN) -s python2.pc python.pc)

+	-rm -f $(DESTDIR)$(LIBPC)/python2$(DEBUG_SUFFIX).pc

+	(cd $(DESTDIR)$(LIBPC); $(LN) -s python-$(VERSION)$(DEBUG_SUFFIX).pc python2$(DEBUG_SUFFIX).pc)

+	-rm -f $(DESTDIR)$(LIBPC)/python$(DEBUG_SUFFIX).pc

+	(cd $(DESTDIR)$(LIBPC); $(LN) -s python2$(DEBUG_SUFFIX).pc python$(DEBUG_SUFFIX).pc)

 # Install the interpreter with $(VERSION) affixed

 # This goes into $(exec_prefix)

@@ -820,7 +826,7 @@ altbininstall:	$(BUILDPYTHON)

 		else	true; \

 		fi; \

 	done

-	$(INSTALL_PROGRAM) $(BUILDPYTHON) $(DESTDIR)$(BINDIR)/python$(VERSION)$(EXE)

+	$(INSTALL_PROGRAM) $(BUILDPYTHON) $(DESTDIR)$(BINDIR)/python$(VERSION)$(DEBUG_SUFFIX)$(EXE)

 	if test -f $(LDLIBRARY); then \

 		if test -n "$(DLLLIBRARY)" ; then \

 			$(INSTALL_SHARED) $(DLLLIBRARY) $(DESTDIR)$(BINDIR); \

@@ -970,10 +976,11 @@ $(srcdir)/Lib/$(PLATDIR):

 	fi; \

 	cd $(srcdir)/Lib/$(PLATDIR); $(RUNSHARED) ./regen

-python-config: $(srcdir)/Misc/python-config.in

+python$(DEBUG_SUFFIX)-config: $(srcdir)/Misc/python-config.in

 	# Substitution happens here, as the completely-expanded BINDIR

 	# is not available in configure

-	sed -e "s,@EXENAME@,$(BINDIR)/python$(VERSION)$(EXE)," < $(srcdir)/Misc/python-config.in >python-config

+	sed -e "s,@EXENAME@,$(BINDIR)/python$(VERSION)$(DEBUG_SUFFIX)$(EXE)," < $(srcdir)/Misc/python-config.in >python$(DEBUG_SUFFIX)-config

+

 # Install the include files

 INCLDIRSTOMAKE=$(INCLUDEDIR) $(CONFINCLUDEDIR) $(INCLUDEPY) $(CONFINCLUDEPY)

@@ -994,13 +1001,13 @@ inclinstall:

 	$(INSTALL_DATA) pyconfig.h $(DESTDIR)$(CONFINCLUDEPY)/pyconfig.h

 # Install the library and miscellaneous stuff needed for extending/embedding

-# This goes into $(exec_prefix)

-LIBPL=		$(LIBP)/config

+# This goes into $(exec_prefix)$(DEBUG_SUFFIX)

+LIBPL=		$(LIBP)/config$(DEBUG_SUFFIX)

 # pkgconfig directory

 LIBPC=		$(LIBDIR)/pkgconfig

-libainstall:	all python-config

+libainstall:	all python$(DEBUG_SUFFIX)-config

 	@for i in $(LIBDIR) $(LIBP) $(LIBPL) $(LIBPC); \

 	do \

 		if test ! -d $(DESTDIR)$$i; then \

@@ -1016,11 +1023,10 @@ libainstall:	all python-config

 	$(INSTALL_DATA) Modules/Setup $(DESTDIR)$(LIBPL)/Setup

 	$(INSTALL_DATA) Modules/Setup.local $(DESTDIR)$(LIBPL)/Setup.local

 	$(INSTALL_DATA) Modules/Setup.config $(DESTDIR)$(LIBPL)/Setup.config

-	$(INSTALL_DATA) Misc/python.pc $(DESTDIR)$(LIBPC)/python-$(VERSION).pc

+	$(INSTALL_DATA) Misc/python.pc $(DESTDIR)$(LIBPC)/python-$(VERSION)$(DEBUG_SUFFIX).pc

 	$(INSTALL_SCRIPT) $(srcdir)/Modules/makesetup $(DESTDIR)$(LIBPL)/makesetup

 	$(INSTALL_SCRIPT) $(srcdir)/install-sh $(DESTDIR)$(LIBPL)/install-sh

-	$(INSTALL_SCRIPT) python-config $(DESTDIR)$(BINDIR)/python$(VERSION)-config

-	rm python-config

+	$(INSTALL_SCRIPT) python$(DEBUG_SUFFIX)-config $(DESTDIR)$(BINDIR)/python$(VERSION)$(DEBUG_SUFFIX)-config

 	@if [ -s Modules/python.exp -a \

 		"`echo $(MACHDEP) | sed 's/^\(...\).*/\1/'`" = "aix" ]; then \

 		echo; echo "Installing support files for building shared extension modules on AIX:"; \

diff -up Python-2.7.3/Misc/python-config.in.debug-build Python-2.7.3/Misc/python-config.in

--- Python-2.7.3/Misc/python-config.in.debug-build	2012-04-09 19:07:33.000000000 -0400

+++ Python-2.7.3/Misc/python-config.in	2012-04-18 19:46:22.082498324 -0400

@@ -45,7 +45,7 @@ for opt in opt_flags:

     elif opt in ('--libs', '--ldflags'):

         libs = getvar('LIBS').split() + getvar('SYSLIBS').split()

-        libs.append('-lpython'+pyver)

+        libs.append('-lpython' + pyver + (sys.pydebug and "_d" or ""))

         # add the prefix/lib/pythonX.Y/config dir, but only if there is no

         # shared library in prefix/lib/.

         if opt == '--ldflags':

diff -up Python-2.7.3/Modules/makesetup.debug-build Python-2.7.3/Modules/makesetup

--- Python-2.7.3/Modules/makesetup.debug-build	2012-04-09 19:07:34.000000000 -0400

+++ Python-2.7.3/Modules/makesetup	2012-04-18 19:46:22.083498312 -0400

@@ -233,7 +233,7 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |

 			*$mod.o*)	base=$mod;;

 			*)		base=${mod}module;;

 			esac

-			file="$srcdir/$base\$(SO)"

+			file="$srcdir/$base\$(DEBUG_EXT)\$(SO)"

 			case $doconfig in

 			no)	SHAREDMODS="$SHAREDMODS $file";;

 			esac

diff -up Python-2.7.3/Python/dynload_shlib.c.debug-build Python-2.7.3/Python/dynload_shlib.c

--- Python-2.7.3/Python/dynload_shlib.c.debug-build	2012-04-09 19:07:35.000000000 -0400

+++ Python-2.7.3/Python/dynload_shlib.c	2012-04-18 19:46:22.083498312 -0400

@@ -46,11 +46,16 @@ const struct filedescr _PyImport_DynLoad

     {"module.exe", "rb", C_EXTENSION},

     {"MODULE.EXE", "rb", C_EXTENSION},

 #else

+#ifdef Py_DEBUG

+    {"_d.so", "rb", C_EXTENSION},

+    {"module_d.so", "rb", C_EXTENSION},

+#else

     {".so", "rb", C_EXTENSION},

     {"module.so", "rb", C_EXTENSION},

-#endif

-#endif

-#endif

+#endif /* Py_DEBUG */

+#endif /* __VMS */

+#endif /* defined(PYOS_OS2) && defined(PYCC_GCC) */

+#endif /* __CYGWIN__ */

     {0, 0}

 };

diff -up Python-2.7.3/Python/sysmodule.c.debug-build Python-2.7.3/Python/sysmodule.c

--- Python-2.7.3/Python/sysmodule.c.debug-build	2012-04-09 19:07:35.000000000 -0400

+++ Python-2.7.3/Python/sysmodule.c	2012-04-18 19:46:22.083498312 -0400

@@ -1506,6 +1506,12 @@ _PySys_Init(void)

                         PyString_FromString("legacy"));

 #endif

+#ifdef Py_DEBUG

+	PyDict_SetItemString(sysdict, "pydebug", Py_True);

+#else

+	PyDict_SetItemString(sysdict, "pydebug", Py_False);

+#endif

+

 #undef SET_SYS_FROM_STRING

     if (PyErr_Occurred())

         return NULL;