-TODO list for the uClibc 0.9.27 release:
+TODO list for every uClibc release:
-------------------------------------------------
- *) 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.
- *) Fix syscall() on mips
- *) Finish up current ldso cleanups
- *) Fix dlopen, for both static and dynamic cases, and make it
- actually comply with SuSv3
-
+ *) 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 the float and long double versions of math funcs
- using wrappers on top of the double versions (size / precision
+ *) 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.
+ 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.
- *) 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
- *) Debugging pthreads with gdb does not work at all on mips
- *) Debugging pthreads with gdb initially appears to work, but
- fails to function correctly on arm
+ *) 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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