In my platform I have to disable Unicode support in Python 2.5.1. The
"configure" file provided a option "--enable-unicode=no" to allow me to
do so. However, If I ran the configure with that option and then make,
the following error showed:
Python/ast.c:3168: undefined reference to `PyUnicode_DecodeRawUnicodeEscape'
Python/ast.c:3170: undefined reference to `PyUnicode_DecodeUnicodeEscape'
collect2: ld returned 1 exit status
make: *** [python] Error 1

Python 2.4.4 can be compiled with this option and works well. Since
"ast.c" was newly introduced in 2.5.1. Maybe we need put MACRO
"Py_USING_UNICODE" in ast.c for function "decode_unicode()". Otherwise
it needs to modify the "configure" file to forbid "--enable-unicode=no".

However in ast.c "decode_utf8()" is using "Py_USING_UNICODE" to make it
"pluggable" for not supporting utf8. Why not do the same thing for
"decode_unicode()"?

Python/ast.c has been fixed but more code needs to be fixed:

gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall
-Wstrict-prototypes  -I. -IInclude -I./Include   -DPy_BUILD_CORE -o
Parser/tokenizer.o Parser/tokenizer.c
Parser/tokenizer.c: In function 'decode_str':
Parser/tokenizer.c:607: warning: assignment discards qualifiers from
pointer target type
Parser/tokenizer.c: In function 'dec_utf8':
Parser/tokenizer.c:1550: warning: implicit declaration of function
'PyUnicode_DecodeUTF8'
Parser/tokenizer.c:1550: warning: initialization makes pointer from
integer without a cast
Parser/tokenizer.c:1552: warning: implicit declaration of function
'PyUnicode_AsEncodedString'
Parser/tokenizer.c:1552: warning: assignment makes pointer from integer
without a cast

/home/heimes/dev/python/release25-maint/Parser/tokenizer.c:1550:
undefined reference to `PyUnicode_DecodeUTF8'
/home/heimes/dev/python/release25-maint/Parser/tokenizer.c:1552:
undefined reference to `PyUnicode_AsEncodedString'
/home/heimes/dev/python/release25-maint/Parser/tokenizer.c:1550:
undefined reference to `PyUnicode_DecodeUTF8'
/home/heimes/dev/python/release25-maint/Parser/tokenizer.c:1552:
undefined reference to `PyUnicode_AsEncodedString'

I fixed it for Python 2.5 and 2.6. However several extensions and
modules don't work w/o unicode support. Please contribute fixes if you
need more support.

r60215 r60216