Annotation of dietlibc/CHANGES, revision 1.141

1.115     fefe        1: 0.11:
                      2:   fix major oops in DNS routines (only with WANT_FULL_RESOLV_CONF enabled).
1.116     fefe        3:   fix vsscanf bug (Thanks, David Chappell).
1.117     fefe        4:   add floor, ceil and memchr prototypes.
                      5:   add __builtin_expect and expect #defines for gcc versions below 3.0
1.118     fefe        6:   cleaner errno vs __errno_location handling
                      7:   add placeholder iconv (iconv_open will always return EINVAL)
                      8:   try to remove kernel 2.4 header dependency in IPv6 sockaddr_in6
                      9:     initialization of getaddrinfo.
1.119     fefe       10:   fix vsnprintf %X (printed lower case)
1.120     fefe       11:   I wrote a new getopt.  It appears to actually work (it is POSIX
                     12:     compliant, it does not sort argv like the GNU version) and is only
                     13:     a little over 300 bytes on x86.
1.121     fefe       14:   Guillaume Cottenceau just wrote me that strncat should be even more
                     15:     broken than it already is: it should append n bytes AND THEN \0!
                     16:     I wonder how many programmers have produces off-by-one errors here...
1.122     fefe       17:   Fix regexec offset return.  autoconf now believes that diet libc has
                     18:     POSIX regular expressions.
1.123     fefe       19:   Fix fnmatch (a/b/* matched a/b/c/d even if FNM_PATHNAME was set)
1.124     fefe       20:   Fix regular expression match for x* when there is no x at all.
1.125     fefe       21:   Fix memory leak in error case in gethostbyname(2|).  Thanks, Dietz Pröpper.
1.126     fefe       22:   Add %h to vsnprintf.
1.127     fefe       23:   Add FAQ.
1.128     fefe       24:   Make %h work for signed numbers and add %hh to vsnprintf.
                     25:   initgroups ignored the group argument :-(
                     26:   remove printf references and nested functions from glob.
1.129     fefe       27:   added an errno in libpthread that will display a prominent linker
                     28:     warning.
1.131     fefe       29:   started getting rid of kernel headers.  Big task! :-(
1.130     fefe       30:   add res_mkquery.  The diet libc can now compile and link mtr.
1.132     olaf       31:   Olaf: added a lot of code in libdl (not yet complete), changed the
                     32:     startup code to make it work with his libdl and ld.so (needs still work
                     33:     too)
1.134     fefe       34:   __dns_readstartfiles only took the first domain or search path.
                     35:     Thanks, Anthony de Boer
1.133     olaf       36:   Olaf: added clone and a new unified_syscall for PowerPC
                     37:     also dynlinker is now available (i386 only at this time)
1.135     fefe       38:   crufted together a stdarg.h implementation from the various gcc headers.
1.136     fefe       39:   implement getopt_long (ugh, the GNU people need professional help)
1.137     fefe       40:   fixed word delimiters in regex (they looked for space, i.e. "," did
                     41:     not work as delimiter)
1.138     fefe       42:   errno.h now declares sys_errlist and sys_nerr.
1.139     fefe       43:   ttyname should return 0 if !isatty.  Thanks, Uwe Ohse.
1.140     fefe       44:   realpath returns NULL if "." cannot be opened (thanks, Uwe Ohse)
                     45:   putenv erroneously accepted (and mishandled) entries without "=".
                     46:     Thanks, Uwe.
1.141   ! fefe       47:   popen returned 255 instead of 127 if /bin/sh could not be run.
        !            48:     Thanks, Uwe.
        !            49:   fgetc did not set the internal EOF indicator on EOF.  Thanks, Uwe.
1.115     fefe       50: 
1.74      fefe       51: 0.10:
                     52:   update getpagesize.
                     53:   add personality.
1.75      fefe       54:   add "%*s" and "%*.*s" support to vsnprintf.
1.76      fefe       55:   add putchar (apparently arm-linux-gcc will substitute printf("\n")
                     56:     with putchar('\n') behind your back...?!
1.77      fefe       57:   import include/scsi/ from glibc.
1.78      fefe       58:   add iopl.
1.80      fefe       59:   add execl and sigdelset prototypes.
                     60:   add getopt_long stuff to getopt.h (may compile but won't link).
1.81      fefe       61:   add RPC headers (no code yet).
1.82      fefe       62:   add mlockall, munlockall
1.83      fefe       63:   make "diet gcc foo.c" work.
                     64:   added Sun RPC code and removed as many warnings as possible in a
                     65:     heroic act of self-mutilation.
                     66:   added getproto* and getdtablesize for the RPC cruft :-(
1.84      fefe       67:   added getpass.  mount from util-linux actually compiles now!
                     68:   fix the sig*set routines.  mount actually works now *bg*
                     69:   fix fwrite dividing by zero when trying to fwrite n records of size 0.
1.85      fefe       70:   added an initial regex implementation (3500 bytes!!!).
1.87      fefe       71:   add llseek and lseek64 with optional lseek fall-back.
1.88      fefe       72:   add res_init.
                     73:   add asprintf (ugh, what an ugly function).
1.89      fefe       74:   expanded arpa/nameser.h to include backwards compatibility defines
1.90      fefe       75:   add ut_name alias to ut_host in struct utmp.
                     76:   add inet_ntop, inet_pton, gethostbyname2.
1.92      fefe       77:   add sysinfo, recvmsg, sendmsg.
1.93      fefe       78:   add endmntent, getmntent, setmntent.
1.94      fefe       79:   fix fnmatch (thanks, Guillaume Cottenceau!)
1.96      fefe       80:   add setenv.
                     81:   remove __restrict from mntent.h, add __restrict__ removal alias for
                     82:     older gcc versions in sys/cdefs.h.
                     83:   add rlim_t, sig_atomic_t declarations.
                     84:   add sigsetjmp #define for __sigsetjmp (oops).
                     85:     (Thanks to Chris Siebenmann for these three bug reports)
1.97      fefe       86:   add a gruesome hack to printf floating point to accept %f and kludge
                     87:     together support for %.2f.  Don't look at the code, please!
1.98      fefe       88:   fixed tcsetpgrp (oops, this is embarassing!  Thanks, Chris Siebenmann)
1.99      fefe       89:   imported fix for entlib by Jeff Garzik.
1.100     fefe       90:   add glob implementation from Guillaume Cottenceau (Thanks!!)
                     91:   add libdl fragments from Olaf (Yeah!  One step closer to dynamic linking!)
1.101     fefe       92:   add REG_ICASE and word start/end handling to my regular expressions.
                     93:   my regular expressions now actually match substrings (i.e. "foobar" to "bar").
1.102     fefe       94:   wrap getcwd to comply to man page (the syscall returns the number of
                     95:     bytes, not the buffer)
                     96:   add realpath.
1.103     fefe       97:   fix vfprintf.
1.104     fefe       98:   fix *scanf %s zero termination.
                     99:   add abs, labs, llabs.
1.105     fefe      100:   add <sys/io.h>, ioperm syscall.
                    101:   add flock to <sys/file.h>
1.106     fefe      102:   fixes to bsearch and the regular expressions.
1.107     fefe      103:   add fake herror.
1.108     fefe      104:   add scandir and alphasort.
1.109     fefe      105:   add killpg
1.110     fefe      106:   implemented a gross hack to make libpthread compile when
                    107:     dietfeatures.h does not define WANT_THREAD_SAFE (it's empty then).
1.111     fefe      108:   add getaddrinfo and freeaddrinfo (man, what a fucked up interface!)
1.112     fefe      109:   fix sigsuspend (syscall had completely fscked up arguments!)
1.113     fefe      110:   RLIM_INFINITY from the kernel is broken.  Thanks to Chris Siebenmann
                    111:     for sending a patch.
1.114     fefe      112:   add getserv*.
                    113:   add WANT_FULL_RESOLV_CONF so that the DNS routines use "domain" and
                    114:     "search" from resolv.conf.
1.74      fefe      115: 
1.73      fefe      116: 0.9:
1.65      fefe      117:   fixed initgroups (oops)
1.66      fefe      118:   Cleanup appending file open for stdio (thanks, James Antill)
                    119:   imported vfprintf fix from James Antill.
1.67      fefe      120:   add fnmatch
                    121:   change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68      fefe      122:   Olaf added character classes to *scanf.
1.69      fefe      123:   Put object and library files into a separate directory (bin-$ARCH).
                    124:   Add "cross" make target to make all architectures.
                    125:   Add "diet" program and man page.
1.70      fefe      126:   Add getgrnam, getgrgid
1.71      fefe      127:   Add cfmakeraw (Thanks, Antonio Musumeci)
1.72      fefe      128:   localtime won't call gettimeofday when the tzfile parser is used.
1.65      fefe      129: 
1.64      fefe      130: 0.8:
1.34      fefe      131:   vsnprintf(0,...) estimated the length of strings with a padding width
                    132:     incorrectly.
1.35      fefe      133:   new reboot() from Olaf.
1.36      fefe      134:   added prototypes for getsockopt and setsockopt.
1.39      fefe      135:   added experimental sem* and shm*
1.38      fefe      136:   define EXIT_SUCCESS and EXIT_FAILURE
1.40      fefe      137:   added setvbuf (only changes mode, not buffer)
1.41      fefe      138:   added dietwarning.h (woohoo, linker warnings!) and used it to warn of
                    139:     insecurity (system, sprintf) or bloat (printf and stdio).
1.42      fefe      140:   added qsort() and bsearch().  Benchmark on 1000 random ints:
                    141:     glibc: 679414 cycles qsort and 3352 cycles bsearch
                    142:     diet libc: 300010 cycles qsort, 553 cycles bsearch
                    143:     I have no idea why glibc is so slow.
1.43      fefe      144:   added __isnan (references by libm.a from glibc).
                    145:   added popen() and pclose().  Now the diet libc can link slsh (from
                    146:     S-Lang!)
1.44      fefe      147:   corrected usleep.  It was more of an msleep until now.
1.45      fefe      148:   corrected __dtostr (it looped when trying to format "0.0").
                    149:   several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46      fefe      150:   added ungetc (does it work?)
1.47      fefe      151:   added inet_aton (yuck!)
1.50      fefe      152:   added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48      fefe      153:   added h_errno and __h_errno_location
                    154:   added inet_ntoa
1.49      fefe      155:   added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51      fefe      156:   add bcopy, index, rindex macros
                    157:   add isgraph and isxdigit
1.52      fefe      158:   add strftime (ugh!!!)
1.53      olaf      159:   Olaf fixed strftime, gmtime_r leap year bug.
1.54      fefe      160:   Jeff Garzik contributed a spec file.  I put it in contrib and hope
                    161:     everbody knows what to do with it...
                    162:   Olaf checked in a ton of libpthread stuff.
1.55      fefe      163:   added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56      fefe      164:   add large file backwards compatibility support (so gzip will run on
                    165:     kernel 2.2 and 2.0)
1.57      fefe      166:   added shutdown
1.58      fefe      167:   added nice
                    168:   added pseudo-locale support for is* (they are now weak aliases,
                    169:     isupper -> __isupper_ascii etc).  So, for example, liblatin1 can
                    170:     overwrite the default is* functions.
1.59      fefe      171:   added liblatin1.a
1.60      fefe      172:   added tzfile implementation (does it work for anyone else?)
1.61      fefe      173:   added syslog(3) (thanks to Rene Müller!)
1.62      fefe      174:   Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
                    175:     Thanks!
1.63      fefe      176:   merged duplicate code in execv and execvp into exec_lib.o
1.34      fefe      177: 
1.21      fefe      178: 0.7.2:
                    179:   added several prototypes to already implemented functions and
                    180:     <sys/reboot.h>.  Thanks for Abraham for pointing this out.
1.22      fefe      181:   added prototypes for process group and dup syscalls.  Thanks to
                    182:     Abraham again.  He also contributed an implementation for daemon(),
                    183:     an ugly BSD hack.  I decided to diversify the lib/ directory a
                    184:     little and now created a libugly/ directory for stuff like system()
                    185:     and daemon() ;-)
                    186:   added libstdio and moved all that stdio crap from lib/ there.  The
                    187:     idea is to start separating now what we will separate for shared
                    188:     libraries anyway.
1.26      fefe      189:   optimized x86 unified-syscall by Olaf.
1.27      fefe      190:   added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
                    191:     limits.h instead)
                    192:   added remove.c and enough cruft to limits.h to make it compile lzo,
                    193:     lzop and bzip2.
1.28      fefe      194:   added mktime, asctime_r, asctime and ctime (needed for gzip).
                    195:   Someone will need to implement a reader for the glibc localtime file
1.31      fefe      196:     format some day (man tzfile, ugh!) :-(
1.29      fefe      197:   added unlink prototype to unistd.h.
                    198:   added gmtime and gmtime_r.
1.31      fefe      199:   fixed sparc unified syscall error handling (please upgrade!).
1.30      fefe      200:   removed readdir glibc compatibility cruft.
1.31      fefe      201:   removed stat glibc compatibility cruft.
1.32      fefe      202:   oops, my fread was broken for pipes.
1.33      fefe      203:   Olaf found a bug in pipe() for sparc, too.
1.21      fefe      204: 
1.9       fefe      205: 0.7.1:
1.11      fefe      206:   optimized away the static arrays from __ltostr and __lltostr.
                    207:   optimized away the static arrays (and more!) from strtoul and strtoull.
                    208:   added system (by Olaf).
1.12      fefe      209:   added tolower and toupper
1.13      fefe      210:   added getopt from Olaf (~600 bytes on x86!)
1.14      fefe      211:   added clone for mips (by Olaf).
                    212:   fixed longjmp and setjmp on sparc not to require glibc include files.
1.15      olaf      213:   added pause for all (by Olaf).
1.17      fefe      214:   added __attribute__ ((__const__)) to ctype.h
1.16      fefe      215:   added isupper and islower.
                    216:   added putc and putchar as macros.
1.17      fefe      217:   added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
                    218:     insightful discussions and patches I partially used for the last three)
1.18      fefe      219:   added getpriority and setpriority (also by Abraham)
1.19      fefe      220:   oops, I broke strtoul in a recent optimization attempt.
1.20      fefe      221:   oi, setjmp and longjmp were broken on other platforms, too!
                    222:     Thanks to Sébastien Côté for reporting this.
1.9       fefe      223: 
                    224: 0.7:
1.6       olaf      225:   clone support for i386,alpha,arm and sparc by Olaf.
1.1       cvs       226:   Initial dynamic loading glue for i386, also by Olaf.
                    227:   We don't have a dynamic loader yet, so this is not yet usable.
                    228:   added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
                    229:     vsprintf, writev, all by Olaf.
1.2       fefe      230:   imported readdir fix from Guillaume.  Mhh, can the kernel interface
                    231:     really be this broken?
1.3       fefe      232:   Found a kludgy way to detect whether the kernel includes define struct
                    233:     stat64 (they also define STAT64_HAS_BROKEN_ST_INO).  If this does
                    234:     not work for you, please tell me!
1.4       fefe      235:   Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7       fefe      236:   Fixed stdio line buffering.  The code was already there but I forgot
                    237:     to mark stdio and stdout as line buffered.  This should really be
                    238:     done dynamically using isatty, though.
1.8       fefe      239:   Removed superfluous "if (1)" in execvp.c
1.1       cvs       240: 
                    241: 0.6.14:
                    242:   *scanf did not append the 0 byte for %s.
                    243:   added creat and changed creat to call open directly instead of open64.
                    244:   did for fread what 0.6.10 did for fwrite.
                    245:   repaired buffered stdio a little (line buffering is still not
                    246:     supported).
                    247:   [All of these bugs have been reported by Guillaume.  Thanks!]
                    248:   added __pure__ to strchr and strrchr in <string.h>
                    249: 
                    250: 0.6.13:
                    251:   included COPYING to make clear that the diet libc is covered by the
                    252:     GNU General Public License (and _not_ the LGPL).  That means that
                    253:     you need to obtain a license from me if you want to use the diet
                    254:     libc in a proprietary program that you want to distribute.
                    255:   The x86 unified syscall swapped arguments #4 and #5 and noone
                    256:     noticed until now!  Thanks to Guillaume Cottenceau for reporting
                    257:     this!
                    258:   The malloc had a subtle bug with small allocations that could cause
                    259:     segfault.  Guillaume reported it, Olaf fixed it.
                    260: 
                    261: 0.6.12:
                    262:   added assert, statfs and fstatfs
                    263:   added include/net/if.h so fget compiles again.
                    264: 
                    265: 0.6.11:
                    266:   added putenv.
                    267: 
                    268: 0.6.10:
                    269:   fixed fwrite.  It returned the number of bytes written, not the number
                    270:     of records.  Thanks to Albert D. Cahalan for pointing this out.
                    271:   fixed fgets.  It returned EOF on empty lines.  Thanks, Erik Frey.
                    272:   added brk and sbrk.  harold@nb.com.sg made me do it.
                    273: 
                    274: 0.6.9:
                    275:   fixed execvp not to return on ENOENT
                    276:   did for {open|read|close|seek|tell}dir what I did for stat before.
                    277:     The glibc compatibility part is currently non-functional.
                    278:   fixed white space handling in sscanf " (" would not match " (".
                    279:   fixed printf to accept 'l' flag.
                    280:   fixed getpwuid (ignored last line)
                    281: 
                    282: 0.6.8:
                    283:   Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
                    284:     mips and arm.  I did the one for ppc.  They can be enabled in dietfeatures.h.
                    285:   added strlcpy and strlcat from OpenBSD.
                    286:   added stat64, fstat64 and lstat64.
                    287:   added endian.h and made ending of strlen.c endianness-aware
                    288:   added string routines size tweak to dietfeatures.h.  Most of the
                    289:     string routines have been unrolled.  This is up to three times as
                    290:     fast but creates up to three times larger code.  Now you can disable
                    291:     the unrolling.
                    292:   added sendfile.
                    293:   I also added pread.  It works on x86 and sparc but not on ppc and mips.
                    294:     I have no idea what's going on.  strace disagrees with the kernel.
                    295:     Can anyone help?  I asked the Linux kernel mailing list for help, too.
                    296:   added a few aliases of the type __libc_open for open.  nm on
                    297:     libpthreads.so indicates that we will need them.
                    298: 
                    299: 0.6.7:
                    300:   the sources now compile without warnings with -Wall.
                    301:   printf now prints "(null)" when %s is passed NULL.  This can be
                    302:     removed with WANT_NULL_PRINTF in dietfeatures.h
                    303:   added vfprintf, execl, ttyname.
                    304:   stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
                    305:     __dietfstat so they can use the normal kernel struct stat.
                    306:     stat, lstat and fstat are now C wrappers that convert to the glibc
                    307:     struct stat.  So we can avoid that overhead for programs that use
                    308:     dietlibc headers.
                    309: 
                    310: 0.6.6:
                    311:   changed the Makefiles so you can now set CFLAGS on the command line
                    312:   added memccmp (analogous to memccpy) and strncmp.
                    313:   Olaf fixed another bug in the sparc unified syscall.
                    314:   Paul Clifford contributed a C version of his strlen.S that is much
                    315:     more efficient than the previous strlen on all platforms!  It also
                    316:     looks like technology from Roswell. ;-}
                    317:   added a "real" stdio.  Well, almost.  Please contribute!
                    318:   added dietfeatures.h so you can remove features you don't need.
                    319:   removed debug code from vsnprintf that changed \0 to ' ' (argh!).
                    320:   stdio now works with simple programs and minigzip from libz.
                    321:   stdio uses some major trickery to avoid linking the stdio, stderr and
                    322:     stdout (and reserving space for them) when they are not used.
                    323: 
                    324: 0.6.5:
                    325:   Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
                    326:     most of them bugs in the new header files, but also missing sigset
                    327:     functions.
                    328:   Paul Clifford contributed an assembly strlen.S for ARM and fixed
                    329:     several bugs.
                    330:   Fixed ppc/setjmp and mips/pipe.
                    331:   Olaf contributed a new sparc unified syscall.
                    332: 
                    333: 0.6.4:
                    334:   declared is* static inline in getservent.
                    335:   added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
                    336:   changed strlen to return 0 when passed NULL.
                    337:   new, much smaller unified syscall for MIPS.  Thanks to Olaf the Mad
                    338:     Scientist who actually implemented this without access to a MIPS
                    339:     box, just from reading the architecture manual.  And it worked out
                    340:     of the box.
                    341:   started a set of system includes, mainly so that I can use lcc and
                    342:     my alpha-linux cross compiler (which is unable to cross-compile
                    343:     glibc).  diet libc can now be compiled without any include files
                    344:     from a normal libc.  The includes do declare more than diet libc
                    345:     currently delivers and they are still far from complete for real
                    346:     applications.
                    347:   I will only add assembly versions that are smaller _and_ faster than
                    348:     the C version.  Larger routines are only accepted if they are called
                    349:     very often and are substantially faster.
                    350:   added i386 assembly strchr, which is smaller and faster than the old
                    351:     version.  It is, however, larger than the version contributed by
                    352:     proton (thanks, anyway).
                    353:   added i386 strlen (31% faster, 14% smaller)
                    354:   "make t" will now create a map file called "mapfile".
                    355: 
                    356: 0.6.3:
                    357:   added sys_errlist, strerror and perror
                    358:   added isblank
                    359:   added atol
                    360: 
                    361: 0.6.2:
                    362:   mmap for ARM didn't compile.  Thanks, Paul!
                    363: 
                    364: 0.6.1:
                    365:   split mmap into the architecture specific subdirectories.
                    366:   getenv now copes with environ==NULL, thanks Paul Clifford.
                    367:   Paul also contributed a smaller ARM startup code.
                    368: 
                    369: 0.6:
                    370:   strcat returned the wrong result.  Thanks, Dietz Pröpper.
                    371:   strtod now understands a negative exponent (oops, thanks Bertram Barth)
                    372:   Port to arm-linux-gnu, but on the Netwinder I use for testing the
                    373:     __dtostr does not work (I have no idea why!)
                    374:   The MIPS port now uses (much smaller) non-PIC code.  That means that
                    375:     the applications you link against diet libc also have to be compiled
                    376:     non-PIC.  I suggest copying the CFLAGS from the diet libc Makefile.
                    377:     Thanks to Ralf Bächle for helping me with this!
                    378:   I made subdirectories for the architectures and use VPATH to override
                    379:     VPATH so that make finds the source file automatically.  That should
                    380:     simplify the sources greatly.
                    381:   Olaf Dreesen contributed Alpha support including setjmp and longjmp!
                    382:   ARM and MIPS now also have setjmp and longjmp
                    383:   "compile" and "load" are now make targets.  Use them for djb programs.
                    384:   added contrib/elftrunc.c which will remove unnecessary ELF headers.
                    385:     Again, contributed from Olaf.  Great work!
                    386: 
                    387: 0.5.12:
                    388:   printf also does signed numbers.
                    389:   If you don't use atexit, dietlibc now does not link exit, only _exit.
                    390:   *printf now correctly returns the number of bytes written.
                    391:   Olaf contributed experimental sscanf and vsscanf implementations.
                    392:   If passed NULL as buffer, snprintf will not write anything but still
                    393:     return the number of bytes it would have written.
                    394:   Initial MIPS port!   (Oh, the agony!)
                    395:     No setjmp and longjmp support yet!  Please contribute!
                    396:   I even implemented unified syscalls for MIPS.  Still, MIPS code is
                    397:     almost twice the size of SPARC code.  If anyone knows why: please
                    398:     tell me!
                    399: 
                    400: 0.5.11:
                    401:   I implemented new unified syscalls for x86, sparc and ppc, this time based
                    402:     on .s files and not .c files, and I moved the syscalls into
                    403:     subdirectores to clean the dietlibc sources up a little.
                    404:   A binary consisting of printf("%s is %d\n","olaf",23) is now
                    405:     2864 bytes on sparc
                    406:     2488 bytes on intel
                    407:   I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
                    408:     to make a few more applications work.
                    409:   Olaf Dreesen also implemented some unified syscall stuff for x86.
                    410:   He discovered that with our unified syscall interface it actually
                    411:     costs <10 bytes total to make all system calls thread safe!
                    412:   I implemented atexit() (can register up to 4 callbacks).
                    413:   I implemented strtod and __dtostr (the opposite).  Now we can add
                    414:     floating point support to vsnprintf and sscanf!
                    415: 
                    416: 0.5.10:
                    417:   I actually saw that I can not only merge the errno handling code of
                    418:     the system calls on x86, I can also merge the rest (including the
                    419:     arguments) except for setting the system call number.  All those
                    420:     system calls are now just a jump to a unified system call handler.
                    421:     I got rid of x86openclose again.  The savings are substantial:
                    422:     chown from embutils went from 7664 to 7184 bytes!
                    423:     If I'd move the system call wrappers to assembly language, I could
                    424:     even reduce the alignment (does not matter since it's just a jump
                    425:     anyway) and get rid of the "ret" behind each jump (one byte per
                    426:     system call!)
                    427: 
                    428: 0.5.9:
                    429:   added memchr, strpbrk, strstr, strtol, isspace (hehe)
                    430:   fixed strdup
                    431:   fixed return values for strcpy and strcat (thanks to Norbert Berzen)
                    432:   Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
                    433:     (no signed integers, only strings and unsigned integers (but
                    434:     supporting octal, hex and decimal).  Thanks, Olaf!  (by the way:
                    435:     that code must be wonderful, I don't understand it at all *bg*)
                    436:     Olaf's printf does understand padding like in "%08d" and "%8d" and
                    437:     automatically pads pointers with '0'.
                    438:   Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
                    439:   Thanks to proton for inspiration on this.
                    440:   The new x86 start code also does not reference exit any more, thus saving
                    441:   64 bytes for executables that don't call exit explicitly.
                    442:     [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
                    443:   Moved errno and environ to start.S, saving no byte binary size but
                    444:     speeding up compilation and slightly shortening dietlibc.a ;-)
                    445:   For x86: joined open and close into one assembler file, sharing the
                    446:     errno handling.  This is a feasibility test and it actually saves a
                    447:     few bytes.  I think I will reimplement the _syscall[1-6] macros on
                    448:     all platforms now to share the errno handling code for them.
                    449: 
                    450: 0.5.8:
                    451:   fixed strchr to be able to look for 0.
                    452: 
                    453:   added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
                    454:   memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
                    455:   strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
                    456:   contributed by Olaf Dreesen)
                    457: 
                    458:   added execvp, getcwd
                    459: 
                    460:   fixed __xmknod
                    461: 
                    462:   Note: can it be that the ftw interface really is so broken that I
                    463:   cannot implement it without having to implement some searching data
                    464:   structure?  I included an experimental ftw implementation that will
                    465:   not follow symlinks.
                    466: 
                    467: 0.5.7:
                    468:   oops, if_nametoindex was broken!
                    469: 
                    470: 0.5.6:
                    471:   ported to ppc-linux.
                    472:   fixed i386 sigsetjmp (I mistyped the function name)
                    473:   included sigjmp.c
                    474: 
                    475: 0.5.5:
                    476:   added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
                    477:   actually, it wasn't fork that wasn't working for sparc, it was pipe.
                    478:   I fixed it now.
                    479:   dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
                    480:   fixed readdir to use getdents and not the intel inline asm
                    481: 
                    482: 0.5.4:
                    483:   ported to sparclinux (sparc32 only).  Beware: does not work yet.
                    484:   added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
                    485: 
                    486: 0.5.3:
                    487:   added tcsetattr and getenv to compile e3
                    488: 
                    489: 0.5.2:
                    490:   added vhangup, tcgetattr, isatty and memcmp for fgetty
                    491:     (http://www.fefe.de/fgetty/)
                    492:   added localtime from uC-libc.
                    493: 
                    494: 0.5.1:
                    495:   stat and friends actually work now.  Yuck!  Another case of
                    496:     translation between kernel and userland.  Why can't the kernel
                    497:     people and the libc people simply agree on a standard?
                    498:   removed many unnecessary includes to speed up compilation.
                    499:   added -fomit-frame-pointer and i386 compilation target to reduce code size.
                    500:   inlined socketcall to reduce code size.
                    501:   "load" and "compile" are examples for djb code.
                    502: 
                    503: 0.5:
                    504:   Olaf Dreesen contributed a much smaller implementation of malloc and friends.
                    505:   each object file is now treated with "strip -x -R .note -R .comment"
                    506:   split each system call into a separate object file
                    507:   added ntohs, htons, alarm, if_indextoname and if_nametoindex
                    508: 
                    509: 0.4.1:
                    510:   oops, the strchr implementation was wrong.  Thanks Jens Laas!
                    511: 
                    512: 0.4:
                    513:   copied opendir and friends from uC-libc.
                    514:   added getservent and getservby* in gerservent.c
                    515: 
                    516: 0.3:
                    517:   remove readdir system call
                    518:   added getdents system call
                    519:   added getpwnam/getpwuid implementation in getpwnam.c
                    520:   added a few string functions (in str*.c)
                    521: 

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