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* Added two new library chunks, 4 and 5, which contain extensions to the kernel and C library respectively. These have no static data associated with them, just being extensions of the stub tables. The reason for this is to minimise wasted space in programs that don't use the C99 facilities; o.stubs is now a library split into 3 pieces - basic kernel and CLib, extra kernel and extra

  CLib; only the bits a program needs get included.

* Previous extensions to the C library stubs revoked - they now stop at _swix;
  all the new C99 functions now live in chunk 4. Anyone using those new
  functions should relink with new stubs and ensure this C library version.

* printf/scanf now support 64-bit types through "ll" and "j" length modifiers.

* Run-time support for VLAs (__rt_allocauto and __rt_freeauto) added. No
  attempt is currently made to clear up on longjmp or to cope with someone
  changing the kernel allocator while a VLA is active. These would be a
  future enhancement.

* Added complete 64-bit run-time support (48 functions) to kernel library;
  these functions are compatible with the ones used by the ARM ADS. Many of
  the simpler functions will not normally be used by the compiler, as it
  will generate inline code. There is scope for improvement by switching
  in MULL and CLZ-using forms of multiply and divide when possible.

* llabs and lldiv added to C library.

* Header files corrected in a few areas, and changed to match the C compiler.
  <stdint.h> and <stdbool.h> now require the compiler to be in C99 mode
  (as detected using __STDC_VERSION__).


Version 5.41. Tagged as 'RISC_OSLib-5_41'

Created cleanroom implementation of 64-bit integer support for licencing reasons. Tested fairly thoroughly (in fact, this testing showed up a bug in the old code which unbalanced the stack for 50% of cases where you divided a negative long long by 10). Hopefully should work faster than the old code too!

Reapplied all relevant old tags.

Real commit date 2008-03-18.

Version 5.40. Tagged as 'RISC_OSLib-5_40'

* Added C99 functions floorf, ceilf, [l]rint[f], trunc[f], [l]round[f], nearbyint[f] and remainder[f].

* Added macros (only) for sinf, cosf, atanf.
* Requires cc 5.43

Version 5.39. Tagged as 'RISC_OSLib-5_39'

* Added C99 extensions to strftime(). All basic specifiers supported, but "E" and "O" modifiers ignored.

* strftime specifiers %c, %X and %x for "C" locale changed to match C99.
* Optimised hypot[f].
* Missing hypotf() declaration added to <math.h>.
* Fixed Shared C Library - inadvertent change to static data size meant it was
  incompatible with the stubs.

Version 5.38. Tagged as 'RISC_OSLib-5_38'

  * snprintf(), vsnprintf(), vfscanf(), vscanf(), vsscanf()
  * hh, j, z and t printf length modifiers (indicating char, intmax_t, size_t
    and ptrdiff_t respectively)
  * Hexadecimal floating-point printing and scanning (%a/%A)
  * %F printf() specifier (upper-case form of %F)
  * Input/output of NaNs and Infinities
  * imaxdiv_t, imaxdiv(), strtoimax(), strtoumax() (simulated through macros)
  * <fenv.h>: feclearexcept(), fegetexceptflag(), feraiseexcept(),
              fesetexceptflag(), fetestexcept(), fegetround(), fesetround(),
              fegetenv(), feholdexcept(), fesetenv(), feupdateenv()
  * FLT_EVAL_METHOD, DECIMAL_DIG
  * hypot(), hypotf(), fabsf(), fdim(), fdimf(), fmax(), fmaxf(), fmin(),
    fminf()
  * INFINITY, NAN, fpclassify(), isfinite(), isinf(), isnan(), isnormal(),
    signbit(), copysign(), copysignf(), nan(), nanf(), nextafter(),
    nextafterf() isgreater(), isgreaterequal(), isless(), islessequal(),
    islessgreater(), isunordered()

This involves adding 36 new entries to the stubs. Current versions of the C
library will not fault client programs with such larger stubs, but will fill
in the extra entries with junk. Programs requiring the new functions will have
to RMEnsure this version of the Shared C Library.

This version of the C library has been fixed so that in future, any extra
unknown stubs entries will be filled in with a branch to zero, rather than
corrupted.

Requires cc 5.41 or later, both to build, and to make use of some of the extra
facilities.


Version 5.37. Tagged as 'RISC_OSLib-5_37'

Version 5.36. Tagged as 'RISC_OSLib-5_36'

  Aborts now give standard error messages (Abort on Data Transfer at... etc)
  *ShowRegs now filled in after aborts
  assert(), abort(), "free failed" and standard signal handlers now use Wimp
    error boxes if in the desktop
  Postmortem button on error boxes to view the postmortem

Also, x$multiply, x$divide, __rt_sdiv, x$remainder, x$udivide, __rt_udiv and
x$uremainder optimised.

Version 5.35. Tagged as 'RISC_OSLib-5_35'

* Fixed C library tty so it can output '\b' (backspace).
* Made offsetof() and va_arg() macros work with C++.

Version 5.34. Tagged as 'RISC_OSLib-5_34'

* Fixed C library tty so it can output '\b' (backspace).
* Made offsetof() and va_arg() macros work with C++.

Version 5.34. Tagged as 'RISC_OSLib-5_34'

Detail:
  strxfrm was passing the buffers to the Territory module SWI the wrong
    way around so Territory_TransformString copied the destination over
    the source rather than vice versa!
Admin:
  Reported by <mailto:ian.foster@gps.tandb.co.uk>
  Fixes Bugzilla bug #4375


Version 5.33. Tagged as 'RISC_OSLib-5_33'

  Initialised so_far in stdio.c to remove compiler warning.
Admin:
  Built.  strcmptest() still indicates that strcmp() is working OK!

Version 5.32. Tagged as 'RISC_OSLib-5_32'

Detail:
  This alternate implementation returned non-zero for equal strings,
    because the tidyup routine failed to stop examining the differing
    words when it found matching zero bytes.
Admin:
  Tested in softload C library, and in Lazarus ROM image.  strcmp()
    appears to be working per spec now.

Version 5.31. Tagged as 'RISC_OSLib-5_31'

Detail:
  The file no longer exists as the UROM definition is passed on the command
    line now.
Admin:
  5.29 wouldn't build because of the missing file - didn't catch it during
    testing for some reason :-(

Version 5.30. Tagged as 'RISC_OSLib-5_30'

  Fix for RISC_OSLib res() function.
Detail:
  Version 4.89 featured an improved strcmp() routine that didn't actually
    work properly (bug #4085).  The return values had the wrong sign if this
    optimised code was used and the string contained top-bit set chars.
  Removed that rlib.s.asmdefs hack as the comment in the makefile suggested.
    Nothing needs it any more as the assembler sources that require it now
    get via a -PD argument.
  res_ prefix function was still wrong as it failed to detect valid but wrong
    filenames, hence the "Make$Path not defined" errors in the latest tools
    release.
Admin:
  Fixes Bugzilla bug #4085
  Should fix BaseSW's build problems too.

Version 5.29. Tagged as 'RISC_OSLib-5_29'

  Module library builds of RISC_OSLib are exported during export_libs
Detail:
  Ever since res_findname was altered to use <appname>:<resourcename> as
    the filename, the !C++ tool has been broken, because C++:Messages
    returns a different error to "not found" when you try to open it (it
    says it is an invalid filename).  This error is now caught explicitly
    and res_findname falls back to using <appname$Dir>.<resourcename>
    like it did before.
Admin:
  Required by FrontEnd 1.21 or later.
  Required by !C++ (c++cmd-3_17 or later to function correctly)

Version 5.28. Tagged as 'RISC_OSLib-5_28'

  Another getenv() bug fixed.
Detail:
  stdio.c contains a vastly improved implementation of fwrite.
  hostsys.h declares _terminate_getenv to remove build warnings.
  armsys.c contains fix to getenv() to stop Omni dying.
Admin:
  Tested on desktop machine for over a week without incident, including
    several heavy fwrite users (WebServe, C compiler)
  fwrite change is documented in Doc/fwrite
  getenv() bug is Bugzilla bug #28

Version 5.27. Tagged as 'RISC_OSLib-5_27'

Detail:
  The BBE export rules for this component are fairly complex.  The rom_link
    bbe rule is overridden in its entirety by clib.rom_link_v as the symbol
    definitions need to be generated and exported during the rom_link phase.
Admin:
  Tested in BBE build; does not affect other builds.

Version 5.26. Tagged as 'RISC_OSLib-5_26'

Stubs were using some 26/32-bit switching macros, which is invalid for a component that has to work on all OS versions. Changed to use 26/32-bit neutral code. Stubs issued in first 32-bit library release were using 26-bit forms, but they should only go wrong on a 32-bit system in failure cases

(such as the SharedCLibrary being unplugged).

Version 5.25. Tagged as 'RISC_OSLib-5_25'

Detail:

  * (As above.)  It would perhaps be a worthwhile change to use LocalRes
    type functionality in future to allow the UK resources to be chosen
    when no locale-specific resources exist.

Admin:

  * Changes first applied to Bethany branch version.  Resources are
    copied from UK -> SAfrica.

Version 5.24. Tagged as 'RISC_OSLib-5_24'

  Modulewrapped modules will now have the correct 32-bitness flag.
Admin:
  Built.

Version 5.23. Tagged as 'RISC_OSLib-5_23'

Detail:
  * One check for 26-bit mode wan't being made, leading to the runtime reporting
    'Uncaught trap:' when a trap should have been catching the abort.  This
    prevented signal handlers from trapping some aborts.
  * When an abort was occuring in SVC mode, the stack wasn't being flattened,
    resulting in all sorts of nasty things when you tried to carry on from a
    signal handler (probably the main reason why you ever see 'No stack for trap
    handler'). SVC and undefined stacks are now flattened.  Further work should
    be done to restore the state of the OS after an abort, but this probably
    requires a new OS call to tidy itself up adequately.
Admin:
  Built 26-bit versions of the library with new 32-bit compatible entry points and checked abort handling with both sharedclibrary and ansilib.

Version 5.22. Tagged as 'RISC_OSLib-5_22'

Second attempt at getting 32-bit overlay manager to work.

Version 5.21. Tagged as 'RISC_OSLib-5_21'

  OS_ReadVarVal.

Detail:
  getenv calls OS_ReadVarVal to read a system variable into a buffer.
  If the buffer is not big enough it increases the size of the buffer by
  256 bytes and tries again.
  However, the first time it was called, it would have no buffer and
  would call OS_ReadVarVal with r2=-1. The PRM says this "may" return an error
  which should be ignored, but if it did not return an error then getenv
  would not allocate a buffer and the call would fail.
  This change allocates a 256 byte buffer before OS_ReadVarVal is called.

Admin:
  Untested.

Version 5.20. Tagged as 'RISC_OSLib-5_20'

* First attempt at a working 32-bit overlay manager. Untested.

Version 5.19. Not tagged

Detail:
  This code would only work in 26-bit modes, since it stored the output
    flags using STR pc, [sp, #4*4]!.  When {CONFIG} is 32, it stores the
    CPSR instead.
Admin:
  Tested in 32-bit Lazarus build - this fixes the RCMMDriver stiffing
    (because it sits with interrupts off waiting for the C flag to be
    set on exit from an OS_Byte call it calls through _swix)

Version 5.19. Tagged as 'RISC_OSLib-5_19'

Detail:
  _kernel_setenv(varname, NULL) should delete the variables.  It now does.
Admin:
  Tested in module.

Version 5.18. Tagged as 'RISC_OSLib-5_18'

Version 5.17. Tagged as 'RISC_OSLib-5_17'

  Fixed bug in getenv() relating to macro and numeric system variables.
Detail:
  Uses SYMDEFS file to avoid messing around with generating little text
    files, generating assembler source, assembling it etc.  abssym et al
    are construct as symbol definition template files and then updated
    directly by the linker ready for export.  The linker can use these
    files directly without needing them to be assembled into AOF format.
  Fixed getenv so that it can read macro and numeric variables.  With these
    variable types, R2 does not equal -length of the variable value, so
    trying to obtain a variable with a larger value than any previously
    read variable would fail.  This is now fixed.
  This module will refuse to build without link 5.19 or later.
Admin:
  Requires Library 0.54 or later.

  This component will not build with Library 0.53 or earlier.

Version 5.16. Tagged as 'RISC_OSLib-5_16'

* Correction to static base location in modulewrap - was affecting some
  DSL 4000 video software.

Version 5.15. Tagged as 'RISC_OSLib-5_15'

Detail:
  %#x shows a leading 0x (and %#X leads with 0X) only when the value
    to be displayed is NOT zero.
Admin:
  Cross-verified against: C89 standard; C9X standard; gcc 2.95 implementation.
  Built.

Version 5.14. Tagged as 'RISC_OSLib-5_14'

Detail:
  Due to a dependency cockup, the C library wasn't being relinked properly
    during rom_link, so all the symbols exported in abssym files pointed
    to the locations the previous build was linked at.  This is now fixed
    by the addition of a new pseudo-target.
Admin:
  Tested clean and incremental build and verified the abssym file.
  Checked the build log to ensure relinking was occurring.
  Versions 5.11 and 5.12 of this component are fundamentally flawed.

Version 5.13. Tagged as 'RISC_OSLib-5_13'

Detail:
	These had been missed during earlier translation efforts.
Admin:
	Tested in a Lazarus build.

Version 5.12. Tagged as 'RISC_OSLib-5_12'

Detail:
  This component now supports multiple TARGETs being passed in:
    Pass in CLib for a minimal C library excluding RISC_OSLib.
    Pass in RISC_OSLib to continue to build the full thing.
  BuildSys will be modified to make SharedCLibrary build ONLY
    the minimal library - this may mean that products that are
    to be updated may have to alter their components file to
    take the new SharedRISC_OSLib component instead of the
    SharedCLibrary target.
  syms.A_Entries is now automatically generated from C_Entries
    because this is the easiest way to generate the file.  If
    extra symbols are added to C_Entries, they will need to be
    removed by the egrep command which strips out _swi and _swix.
  Makefile tidied to be more careful about ${COMPONENT} and ${TARGET}
  clean_all rule improved to really clean things properly.
Admin:
  Tested in STB400-2M build and on desktop build.
  Requires BuildSys-2_41 or later.

Version 5.11. Tagged as 'RISC_OSLib-5_11'

C library now has a default message for C71 (Calling standard no longer supported), so you get a meaningful message if soft-loading a new version.

No code changes.

Version 5.10. Tagged as 'RISC_OSLib-5_10'

Version 5.09. Tagged as 'RISC_OSLib-5_09'

Detail:
  * Copied UK resources to Italy, Germany (excepting where already
    present), France and Turkey for multi-language builds.
    LocalRes: cannot be used here, because of the clib/rlib prefixes on
    the resource paths.
    Note: These languages will need translating at some point, but are not
    generally user visible.
Admin:
  Required for multiple language build of Bethany.

Version 5.08. Not tagged