[uclibc-ng.git] / TODO


Erik's TODO list for the next release:

    1) Release gcc 2.95.x native uClibc toolchain with
	STLport (to provide full C++ support)
    2) Commit new configuration system (CML1 + kbuild + menuconfig)
	work is already done and ready to commit...
    3) Fix profiling support
    4) Implement getgrgid_r and getgrnam_r, per SuSv3 
    5) Fix libc/inet/rpc/rpc_thread.c thread local storage
    6) Change HAS_FLOATING_POINT so we can support -msoft-float
    7) When options are disabled, also disable them in the
	include files as well.
    8) Make all small objects (>~50 bytes) into either inlines or
	into a static library
    9) Rework code that fails POSIX conformance tests
   10) Document all differences between the feature set of uClibc 
	and glibc.
   11) Add missing syscall() function to ports that are still 
	missing it.  (x86 and arm are finished so far).
   12) Make sure that shared library constructors that depend on 
	prior libc initialization work correctly


-----------------------------------------------------------------------------
Manuel's todo:

In the next couple of months, I plan on completing the wide char and locale
support.  Here's my current list of things to implement by early November.

  1) Little things that need fixing:
  ----------------------------------
  a) Use locale decimal point in *printf() and strto*d() -- slightly
     complicated by the fact that at least one locale uses a wchar
     radix that does not map to a single byte in UTF-8.
  b) Use locale digit grouping in *printf().
  c) Implement %lc (%C) and %ls (%S) handling for printf.
  d) Deal with mb format string issues in printf, scanf, 
  strftime (at least).
  e) Implement wcwidth() and wcswidth() -- use Markus Kuhn's versions.
  
  2) Implement wide char numeric conversion functions -- wcsto*().
  ----------------------------------------------------------------
     These should be relatively minor modifications to the corresponding
     strto*() functions, unless locale specific alternate digit support
     is desired.
  
  3) Implement wide formatted output -- *wprintf():
  -------------------------------------------------
     The stream output variants should be easily created by appropriately
     modifying the char *printf() functions.
  
     The string buffer variants may take some time to implement because
     they need to store wchars in a buffer.  It will be necessary to hack
     the core stdio code slightly to support this.
  
  4) Reimplement scanf for narrow and wide streams.
  -------------------------------------------------
     The current char version of scanf() needs some cleanup.  Also,
     modifying the char version of scanf() to create the wchar versions
     will require reworking the implementation of matching char sets
     (enclosed in []).
  
     Also, as with *wprintf() above, the string buffer variants of wscanf()
     may require some additional work to the core stdio code.
  
  5) Additional str{f|p}time issues.
  ----------------------------------
     Support locale specific alternate digits.
     Support locale era in year designations.
  
  6) Other locale issues (my implementation):
  -------------------------------------------
  a) Clean up locale code to make building easier.  Fix alt_digits.
     (Note: This is only _clean_up_ of the current stuff in extra/locale
      so that it can be cross-compiled, etc.  I'm not talking about the
      complete rewrite that should really be done.)
  b) Additional clean up of ctype and wctype.
  c) Implement collation support for char and wchar -- *xfrm() and *coll().
  d) transliteration of unsupported wchars in 8-bit locales (like glibc).


Other stuff:

Reimplement _dtostr to correct its deficiencies (%A support!) and hopefully
	reduce its size.

Move the target-specific sysconf.c generator to extra (as it needs to be
	run on the target) and fix libc/unistd/Makefile.

Make errno and endptr handling the default in the strto* functions and
	document how to turn those off to save space.

-----------------------------------------------------------------------------
ds's list:

Search for string literals that are not in the .rodata section.  (Varies
by architecture and gcc version.)

man pages for binaries

add obstack stuff for gettext (?)

check compiling without FP support -- are FP instructions still generated?
Needs a uClibc_config.h entry dependent on HAS_FLOATING_POINT.

Why does ld.so search /usr/powerpc-uclibc/lib before LD_LIBRARY_PATH?

-----------------------------------------------------------------------------

Any takers?

*) Fix regex so it isn't so stinking big
*) Fix glob so it isn't so stinking big
*) Documentation
	- List all differences between the feature set of uClibc and glibc.
*) run 'nm -D --size-sort -t d libuClibc-0.9.5.so' and work on the biggest things 
	(i.e. stuff at the end of the list) to make them smaller.
*) make inb/outb work for all arches.  This is complete for i386 and arm.  
	Other archs like powerpc, still need fixing.

-----------------------------------------------------------------------------

PORTING
-------

bits/dirent.h currently differs from the glibc version (d_type unsupported)
Commit	Line	Data
46f33675	1
b014ecc4	2	Erik's TODO list for the next release:
4893763f	3
8d10b240 EA	4	1) Release gcc 2.95.x native uClibc toolchain with
	5	STLport (to provide full C++ support)
	6	2) Commit new configuration system (CML1 + kbuild + menuconfig)
	7	work is already done and ready to commit...
	8	3) Fix profiling support
	9	4) Implement getgrgid_r and getgrnam_r, per SuSv3
	10	5) Fix libc/inet/rpc/rpc_thread.c thread local storage
	11	6) Change HAS_FLOATING_POINT so we can support -msoft-float
	12	7) When options are disabled, also disable them in the
520204ff	13	include files as well.
8d10b240	14	8) Make all small objects (>~50 bytes) into either inlines or
520204ff	15	into a static library
8d10b240 EA	16	9) Rework code that fails POSIX conformance tests
8d10b240 EA	17	10) Document all differences between the feature set of uClibc
870587d7	18	and glibc.
8d10b240 EA	19	11) Add missing syscall() function to ports that are still
8d10b240 EA	20	missing it. (x86 and arm are finished so far).
a356363e EA	21	12) Make sure that shared library constructors that depend on
a356363e EA	22	prior libc initialization work correctly
b014ecc4	23
76a5ce1a	24
03f338ab MNI	25
03f338ab MNI	26	-----------------------------------------------------------------------------
16952cf2	27	Manuel's todo:
2a1d34e7	28
eb7c9eb0 MNI	29	In the next couple of months, I plan on completing the wide char and locale
	30	support. Here's my current list of things to implement by early November.
	31
	32	1) Little things that need fixing:
	33	----------------------------------
	34	a) Use locale decimal point in printf() and strtod() -- slightly
	35	complicated by the fact that at least one locale uses a wchar
	36	radix that does not map to a single byte in UTF-8.
	37	b) Use locale digit grouping in *printf().
	38	c) Implement %lc (%C) and %ls (%S) handling for printf.
	39	d) Deal with mb format string issues in printf, scanf,
	40	strftime (at least).
	41	e) Implement wcwidth() and wcswidth() -- use Markus Kuhn's versions.
	42
	43	2) Implement wide char numeric conversion functions -- wcsto*().
	44	----------------------------------------------------------------
	45	These should be relatively minor modifications to the corresponding
	46	strto*() functions, unless locale specific alternate digit support
	47	is desired.
	48
	49	3) Implement wide formatted output -- *wprintf():
	50	-------------------------------------------------
	51	The stream output variants should be easily created by appropriately
	52	modifying the char *printf() functions.
	53
	54	The string buffer variants may take some time to implement because
	55	they need to store wchars in a buffer. It will be necessary to hack
	56	the core stdio code slightly to support this.
	57
	58	4) Reimplement scanf for narrow and wide streams.
	59	-------------------------------------------------
	60	The current char version of scanf() needs some cleanup. Also,
	61	modifying the char version of scanf() to create the wchar versions
	62	will require reworking the implementation of matching char sets
	63	(enclosed in []).
	64
	65	Also, as with *wprintf() above, the string buffer variants of wscanf()
	66	may require some additional work to the core stdio code.
	67
	68	5) Additional str{f\|p}time issues.
	69	----------------------------------
	70	Support locale specific alternate digits.
	71	Support locale era in year designations.
	72
	73	6) Other locale issues (my implementation):
	74	-------------------------------------------
	75	a) Clean up locale code to make building easier. Fix alt_digits.
	76	(Note: This is only _clean_up_ of the current stuff in extra/locale
	77	so that it can be cross-compiled, etc. I'm not talking about the
	78	complete rewrite that should really be done.)
	79	b) Additional clean up of ctype and wctype.
	80	c) Implement collation support for char and wchar -- xfrm() and coll().
	81	d) transliteration of unsupported wchars in 8-bit locales (like glibc).
	82
	83
	84	Other stuff:
	85
	86	Reimplement _dtostr to correct its deficiencies (%A support!) and hopefully
	87	reduce its size.
e13e3a7d	88
16952cf2 MNI	89	Move the target-specific sysconf.c generator to extra (as it needs to be
	90	run on the target) and fix libc/unistd/Makefile.
	91
03f338ab MNI	92	Make errno and endptr handling the default in the strto* functions and
	93	document how to turn those off to save space.
	94
	95	-----------------------------------------------------------------------------
2d7114f8 DS	96	ds's list:
	97
	98	Search for string literals that are not in the .rodata section. (Varies
9aacef21	99	by architecture and gcc version.)
2d7114f8 DS	100
	101	man pages for binaries
	102
2d7114f8 DS	103	add obstack stuff for gettext (?)
2d7114f8 DS	104
9aacef21 DS	105	check compiling without FP support -- are FP instructions still generated?
9aacef21 DS	106	Needs a uClibc_config.h entry dependent on HAS_FLOATING_POINT.
2d7114f8	107
9aacef21	108	Why does ld.so search /usr/powerpc-uclibc/lib before LD_LIBRARY_PATH?
4893763f EA	109
	110	-----------------------------------------------------------------------------
	111
	112	Any takers?
	113
	114	*) Fix regex so it isn't so stinking big
	115	*) Fix glob so it isn't so stinking big
4893763f EA	116	*) Documentation
	117	- List all differences between the feature set of uClibc and glibc.
	118	*) run 'nm -D --size-sort -t d libuClibc-0.9.5.so' and work on the biggest things
	119	(i.e. stuff at the end of the list) to make them smaller.
	120	*) make inb/outb work for all arches. This is complete for i386 and arm.
	121	Other archs like powerpc, still need fixing.
	122
2d7114f8	123	-----------------------------------------------------------------------------
e53f70e1 MNI	124
	125	PORTING
	126	-------
	127
	128	bits/dirent.h currently differs from the glibc version (d_type unsupported)
4893763f EA	129
4893763f EA	130