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  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'

  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'

  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'

  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'

Version 5.06. Tagged as 'RISC_OSLib-5_06'

This is the standard RISC OS convention (cf OS_NewLine) - some apps assume
it when redirecting output.

Version 5.02. Tagged as 'RISC_OSLib-5_02'

StrongARMfudge flag removed.
StrongARM compatibility set according to AMBKernel flag in Hdr:RISCOS
strftime %U and %W specifiers fixed for week 0.

Version 4.89. Tagged as 'RISC_OSLib-4_89'

If a module written in C uses function getenv, buffer space
is allocated in the RMA. This buffer was never freed, leading
to RMA leakage when the module was 'RMKill'ed or 'RMReInit'ed.

Changes

 c.armsys
   added function _terminate_getenv to free the buffer

 c.stdlib
   added flag getenv_finalised to the exit_s structure

   initialised getenv_finalised in function _exit_init

   atexit tests getenv_finalised, calls _terminate_getenv

 s.version
   version string changed to 4.86 (27 Jul 1998)