I just found about the smelly build target. It checks for smelly exports.

$ make smelly
[...]
nm -p libpython2.6.a | \
                sed -n "/ [TDB] /s/.* //p" | grep -v "^_*Py" | sort -u; \

asdl_int_seq_new
asdl_seq_new
init_ast
init_codecs
initerrno
initgc
initimp
initposix
initpwd
initsignal
init_sre
init_symtable
initthread
initxxsubtype
initzipimport

nm -p libpython3.0.a | \
                sed -n "/ [TDB] /s/.* //p" | grep -v "^_*Py" | sort -u; \

_add_one_to_index_C
_add_one_to_index_F
asdl_int_seq_new
asdl_seq_new

These should be checked and fixed.

Are you suggesting that the init* functions in Python 2.6 should not
longer be exported? Why? And how?

I just suggest that somebody should look into it. I neither know how
critical the issue is nor how to change them. This bug report serves as
a reminder.

For Python 2.x you cannot change the "main" function name of C
extensions, since this is used by the Python import mechanism.

I guess you *could* change the name of extensions that become builtin
modules. However, I think it is not worth the trouble, especially since
PEP 3121 solves the problem for good, for Python 3.

I propose to simply filter out init[_a-z]+ from the set of "bad" symbols.

That leaves us with asdl_*_seq_new, and _add_one_to_index_; the latter
is already reported as issue3101.

There is no proposed patch yet, so removing 2.5.3 from the target versions.

#5591 is a duplicate of this.

In trunk:

_add_one_to_index_C
_add_one_to_index_F
asdl_int_seq_new
asdl_seq_new
init_ast
init_codecs
initerrno
initgc
initimp
initposix
initpwd
initsignal
init_sre
init_symtable
initthread
initxxsubtype
initzipimport

In py3k:

_add_one_to_index_C
_add_one_to_index_F
asdl_int_seq_new
asdl_seq_new

Re: msg #77350:
> I propose to simply filter out init[_a-z]+ from the set of "bad" 
> symbols.

I'm attaching a patch (to trunk) to Makefile.pre.in which filters out such symbols.

Relevant part of output of "make smelly" on my svn build with this patch:
nm -p libpython2.7.a | \
		sed -n "/ [TDB] /s/.* //p" | grep -v "^_*Py" | \
		grep -v -E "^init[_a-z]+" | sort -u; \

_add_one_to_index_C
_add_one_to_index_F
asdl_int_seq_new
asdl_seq_new

py3k is much cleaner than python 2, due to the change in the module API.

Here's "make smelly"'s output on a recent py3k checkout:
nm -p libpython3.2.a | \
                sed -n "/ [TDB] /s/.* //p" | grep -v "^_*Py" | sort -u; \

_add_one_to_index_C
_add_one_to_index_F
asdl_int_seq_new
asdl_seq_new

Patch to py3k which adds the "_Py" prefix to the four listed symbols.

With this, the output from "make smelly" is clean (odorless, perhaps?).

However, adding _Py does seem to go against this comment in Include/asdl.h:
/* It would be nice if the code generated by asdl_c.py was completely
   independent of Python, but it is a goal the requires too much work
   at this stage.  So, for example, I'll represent identifiers as
   interned Python strings.
*/