-TODO list for the uClibc 1.0.0 release:
+TODO list for every uClibc release:
-------------------------------------------------
+ *) Test cris, i386, mips, mipsel, sh, x86_64, arm, armeb, and powerpc
+ with the latest LTP testsuite. Fix any regressions and post LTP
+ testsuite results for each architecture on uclibc.org.
+ *) Audit header files. Remove prototypes for all functions that
+ are not supported -- especially needed for the libm headers.
+ *) Audit header files. When options are disabled, also disable
+ them in the include files as well by checking for the proper
+ define from include/bits/uClibc_config.h (pulled in from features.h)
+TODO list for the uClibc 1.0.0 release:
+-------------------------------------------------
+ *) NPTL
+ support arches: (o todo; + done)
+ o alpha
+ + arm
+ o avr32
+ o bfin
+ o cris
+ o e1
+ o frv
+ o h8300
+ o hppa
+ + i386
+ o i960
+ o ia64
+ o m68k
+ o microblaze
+ + mips
+ o nios
+ o nios2
+ + powerpc
+ + sh
+ + sh64
+ o sparc
+ o v850
+ o vax
+ o x86_64
+ o xtensa
+ o ...
+ *) Go through SUSv4
+ TOC: http://www.opengroup.org/onlinepubs/9699919799/xrat/contents.html
+ shell (busybox): http://www.opengroup.org/onlinepubs/9699919799/xrat/V4_xcu_chap01.html#tag_22_01_01
+ interface:
+ http://www.opengroup.org/onlinepubs/9699919799/xrat/V4_xbd_chap13.html#tag_21_13_02
+ http://www.opengroup.org/onlinepubs/9699919799/xrat/V4_xsh_chap01.html#tag_23_01_01
+ *) glob / fnmatch tests fail
+ *) regex should pass AT&T conformance tests
+ *) Finish hiding uClibc internal symbols from our exported namespace
+ *) Add system for generating minimal system call asm wrappers that abuse
+ the C ABI to minimize amount of register/stack manipulation
+ *) Explicity add some sortof CONFIG_LINUX_2_2_ABI, CONFIG_LINUX_2_4_ABI
+ and CONFIG_LINUX_2_6_ABI type options, rather than having the abi
+ depend on the selected set of kernel headers. This will likely also
+ require that we provide a set of kernel headers (probably a derivitive
+ of Mazur's linux-libc-headers) that can supplies the 2.2, 2.4, and 2.6
+ kernel abi.
*) Documentation updates:
*) Write a uClibc HOWTO document
*) Update README document
*) Update docs/uClibc_vs_SuSv3.txt document
*) Update docs/threads.txt document
*) Write man pages for ldd and ldconfig utility binaries
- *) Perhaps implement glibc style frame-unwinding, so that gcc need
- not be built with --enable-sjlj-exceptions for C++ exception handling
- to work.
*) Implement some mechanism (perhaps encoded in the .so name,
perhaps using an abi tag magically embedded into each object)
for flagging config options that break the ABI. Options
such as UCLIBC_HAS_SOFT_FLOAT, UCLIBC_HAS_THREADS, UCLIBC_HAS_LOCALE,
and perhaps others (finalize list) produce a lib with a differing
ABI. Make it so apps cannot use an ABI mis-matched uClibc.
- *) Implement the float and long double versions of math funcs
- using wrappers on top of the double versions (size / precision
+ This is most easily done using symbol versioning...
+ *) Implement the long double versions of math funcs on interrested
+ arches using wrappers on top of the double versions (size / precision
trade off where size clearly wins).
- *) Delete current profiling code (because it is complete crap
- and only works properly when static + PIC, and because it is
- quite intrusive, and because there are better ways to profile)
- *) Fix profiling by adding missing stub functions per
- http://uclibc.org/lists/uclibc/2004-February/008167.html
- and used by, i.e. http://www710.univ-lyon1.fr/~yperret/fnccheck/
- *) Audit header files. Remove prototypes for all functions that
- are not supported -- especially needed for the libm headers.
- *) Audit header files. When options are disabled, also disable
- them in the include files as well by checking for the proper
- define from include/bits/uClibc_config.h (pulled in from features.h)
*) Make all small objects (>~50 bytes) into either inlines or
into a static library
*) Cleanup / rewrite sysconf.c. It should get some information
from ldso (such as HZ). Other stuff it currently just makes
up, which is obviously wrong. Also bits/uClibc_clk_tck.h
needs to be updated at the same time to get proper HZ values.
- *) __data_start needs to be added to any crt0.S files that don't
- currently have it. It is used by the boehm gc, amoung other
- things. mjn3 has added it to i386 and mips, but some archs
- are still missing it.
- *) It would nice if valgrind wouldn't complain about the atexit() malloc'd
- memory for destructors, which happens since the dynamic linker calls
- atexit(), which calls malloc() prior to valgrind starting, so valgrind
- complains because it didn't see that memory allocated.
- *) From the the ELF spec "...All shared object initializations happen
- before the executable file gains control. ... Before the initialization
- code for any object A is called, the initialization code for any other
- objects that object A depends on are called. For these purposes, an object
- A depends on another object B, if B appears in Ads list of needed objects
- (recorded in the DT_NEEDED entries of the dynamic structure). The order of
- initialization for circular dependencies is undefined." uClibc's shared
- lib loader should be fixed to run ctors in the specified order.
*) poll emulation using select() for old 2.0.x uClinux kernels
in libc/sysdeps/linux/common/poll.c fails some python self-tests.
Of course, modern systems using the actuall poll() syscall work fine.
- *) Rework the build system Makefile to eliminate recursive make.
- *) Build both pic and non-pic objects where appropriate, so that
- static libs need not pay the pic size penalty.
*) Cleanup/scrub all the Makefile copyright junk
- *) Fix syscall() on mips
+ *) Fix dlopen, for both static and dynamic cases, and make it
+ fully comply with SuSv3
+ *) check if sched_getcpu is only pulled in where it should be
+ *) remove HANDLE_OLDER_RLIMIT, NEW_GETRLIMIT (conditionalize on
+ ugetrlimit, it seems, else use the modern variant)
+ *) simplify exec*() in the light of execvpe (perhaps single internal
+ impl); USE_GNU for execvpe (and other GNU extensions, see psm).
TODO list for AFTER the uClibc 1.0.0 release:
-------------------------------------------------
- *) Add support for Linux 2.6.x NPTL pthreads, futexes, etc
+ *) Add support for 64bit time (to deal withhttp://2038bug.com/):
+ date -s 011903142038 sets epoch to roll over in a few seconds (2^31)
*) Add support for Linux 2.6.x fast vsyscalls
*) Enable pristine source tree builds
*) Fix regex so it isn't so stinking big
*) run 'nm -D --size-sort -t d libuClibc-0.9.26.so' and work on the
biggest things (i.e. stuff at the end of the list) to make
them smaller.
+ *) Fix dlopen/dlsym/dlclose locking to more fine grained or use RCU
<more wishlist items here>
+Arch specific TODO:
+-------------------------------------------------
+ alpha:
+ ldso is not implemented
+ arm:
+ update crt1 code again for nommu (http://bugs.uclibc.org/view.php?id=538)
+ recruit jbowler and integrate thumb support
+ frv:
+ needs to be updated for the new ldso changes and unification of the
+ uClibc_main funcs (__uClibc_start_main doesnt exist anymore)
+ hppa:
+ errno.c test segfaults causes segfault in clone.S (seems to be in glibc too)
+ i386:
+ add support for fast system calls
+ ia64:
+ ldso is not implemented
+ m68k:
+ ldso lazy relocation doesnt work
+ sh64:
+ ldso is reasonably broken, presently requiring additional
+ coaxing/threatening.
+ sparc:
+ need a sigaction.c since common one doesnt work (signal tests)
+ ldso needs to be updated since it's totally broken atm
+ vax:
+ pthread support, linktime warning support (implies GAS patches),
+ general touchups, testing, ldso.
-----------------------------------------------------------------------------
d) Implement glibc 'a' flag for scanf string conversions.
e) Allow use of the older non-table-based ctype functions when using
stub locale support. (smaller)
+ f) __drand48_iterate should be void
+ g) alphasort vs. versionsort. The former seems to be SVID, the latter GNU
+ i.e. reverse to what we currently do. The latter is unimplemented.
+ h) ponder removal/configs to turn off: __xpg_*, bsd_signal, dysize,
+ getw/putw, utimes,
2) Additional str{f|p}time issues.
----------------------------------
b) Write a space-efficient gettext substitute, to avoid storing large amounts
of redundant data.
+
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