Power-Programmierung/CD2.mdf/c/library/os2/watcom/c286_b/readme.b

Text File | 1992-10-04 | 27.1 KB | 694 lines

          ************
          ** WTOUCH **
          ************

    HPFS filename support was added.
===========================================================

          **************************************
          ** IBM WorkFrame/2 Support Programs **
          **************************************

    Fixed problem with main dialog refusing to close if secondary
    dialogs had been closed using the system menu close option.
    Fixed mixup with data threshold and structure packing when
    generating command lines.
===========================================================

    Selecting certain options from the compile options dialog
    would cause an error (command line missing filename) to be
    issued when compiling from the actions menu.
===========================================================

          *************
          ** cmdedit **
          *************

    Entering 'u' with leading or trailing whitespace no longer
    causes cmdedit to complain.  Fixed problem which would cause
    cmdedit to halt OS/2 2.0.  Cmdedit now has a proper stack
    segment so that it can be loaded high.  Fixed problem with
    long PATH variables in os2edit.dll.

===========================================================

    Fixed file name completion problem that caused os2edit.dll to
    abnormally terminate.
===========================================================

    Under OS/2, search for .CMD files as well as .BAT, .EXE, and
    .COM files when doing executable name completion.
===========================================================

    Trailing whitespace in the 'd' command was being converted to
    backslashes, which would then cause an invalid directory error.
    Now all trailing backslashes and slashes are stripped (unless
    the command is of the form "d \" or "d x:\").
===========================================================

    OS2EDIT.DLL now supports HPFS filenames.
===========================================================

    Fixed bug with command history and command lines that were
    greater than 255 chars.
===========================================================

          **************
          ** Profiler **
          **************

    Windows Sampler was not working with 32-bit Windows
    applications.
===========================================================

          **********
          ** WOMP **
          **********

    Fixed a bug which would cause WOMP to leave a temporary file
    around in certain error situations.
===========================================================

    HPFS filename support was added.
===========================================================

          ************
          ** WVIDEO **
          ************

    For SERSERV.NLM you are now allowed to specify board
    and port numbers as reported by AIO. Board numbers are
    preceeded by a "b" and port numbers are preceeded by
    a "p". E.g.

        load serserv b3p1

    will attach to port one on board three. No spaces are
    allowed between the board and port numbers.
===========================================================

    OS/2 2.0 trap file was reporting guard page exceptions.
===========================================================

    On certain clone BIOS's, using the PLS.TRP, RSI.TRP, or ADS.TRP
    files would crash the debugger on startup.
===========================================================

    The Windows trap file, STD.DLL, thought that a 486SX
    chip had a floating point co-processor.
===========================================================

    Watch points in OS2 2.0 trap file, STD32.DLL, didn't work
    if the memory wasn't double word aligned.
===========================================================

    The debugger would die if symbol information was present,
    but there were no global symbols in the program (This
    could only happen with single assembly language source
    file programs).
===========================================================

    When using the RSI.TRP file, if the program being debugged
    modified memory containing an active breakpoint, the debugger
    would use the new value at that location as the breakpoint
    instruction from then on.
===========================================================

    The OS/2 version of WVIDEO now supports HPFS long file
    names.
===========================================================

          ************************
          ** Windows Supervisor **
          ************************

    The Escape function NEXTBAND didn't work correctly.
===========================================================

    The function _16SendMessage was missing from the supervisor.
===========================================================

    WBIND was building invalid .EXE's if RC step failed.
===========================================================

    A change was to the linker made allow .REX files to have > 1MB of
    relocation entries.  The supervisor was changed to load this kind
    of .REX executable.
===========================================================

    The supervisor would crash if it's selector cache was empty and
    during a thunk more than 2 selector aliases were created.
===========================================================

    Windows does not preserve the EM bit of CR0 when doing a task switch
    between VM's.  This would cause the emulator for 32-bit Windows
    applications to stop working when you start/switch to a DOS VM.
===========================================================

    An entry in GDI disappeared between the final beta of Windows 3.1
    and the release.  The supervisor with 3.1 extensions referenced this
    entry and would cause the debugging version of Windows to complain
    about an invalid ordinal.
===========================================================

    The supervisors and wbind have been modified so that the module name
    of a 32-bit windows application is that of the applictaion, and not
    win386 or w386dll (the name of the supervisor).
===========================================================

          **********
          ** Make **
          **********

    HPFS filename support was added.  WMAKE running under OS/2
    now preserves the case of filenames (but does case insensitive
    comparisons).
===========================================================

    $[&, $^&, or $]& at the end of a line inside a !if/!endif
    section that is skipped wouldn't be parsed correctly.
    For example:

    !ifdef __something_thats_not_defined__
    crispy = crunchy $^&
    !endif

    was parsed as if it was:

    !ifdef __something_thats_not_defined__
    crispy = crunchy $^!endif

===========================================================

          ************
          ** Linker **
          ************

   The phar lap .rex executable format (the one used for
   the windows 386 stuff) could not handle more than 1 MB
   of relocations, so we had to extend the format to get
   around this. (There are some huge apps out there...)
===========================================================

    If you said debug novell (or any other novell specific
    command) before doing a system novell or specifying an
    object file, the protected mode linker would crash
===========================================================

    Added HPFS support to wlink, ms2wlink and fcenable
===========================================================

    fixed a bug in wstrip where it would not behave as
    desired in very low memory conditions.
===========================================================

    Fixed problem which would cause wlink to crash under
    DR-DOS 6.0 with XMS memory when spool files were used.
===========================================================

          ***************
          ** Librarian **
          ***************

    Added HPFS support.
===========================================================

    Fixed problem which would cause wlib to crash under
    DR-DOS 6.0 with XMS memory.
===========================================================

          ********************
          ** C Header Files **
          ********************

    Added prototypes for vcscanf and vcprintf in CONIO.H
===========================================================

          **********************
          ** Graphics Library **
          **********************

    The _outtext() function was ignoring newline characters (\n) past
    the right edge of the text window.
===========================================================

    One of the functions called by _outtext() was using far pointers
    where it wasn't necessary, making it less efficient.
===========================================================

    Changed method of detecting Chips and Technologies SuperVGA cards.
===========================================================

    The font files (std.asm, hercfont.asm, etc) had segment
    definitions of the form "_DATA segment byte 'DATA'".
    These were changed to "_DATA segment byte public 'DATA'"
    Depending upon link order, these private segments could cause
    DGROUP to be split, causing incorrect relocations within
    the program.
===========================================================

    The _outtext() function was assuming an invalid number of
    text rows on the screen for certain SuperVGA adapters.
===========================================================

    The _setfont() function was not properly freeing memory, when
    multiple calls to the function were performed. This would cause
    the program to hang (16-bit) or to switch to using the default
    font (32-bit).
===========================================================

          ************************
          ** FORTRAN 77 Library **
          ************************

    Under OS/2 2.0, denormal floating-point exception is
    now ignored.
===========================================================

    Added FEXIT() subroutine that allows exit from a
    FORTRAN program with a return code.
===========================================================

    If a record was written at the end of a file and immediately
    re-read, an end-of-file message would be incorrectly issued.
    This only happens when the block size (default 16K for 32-bit
    and 4K for 16-bit) is not a multiple of the record size (default
    256).
===========================================================

    In the 16-bit runtime libraries, reading a record from a
    file opened using RECL=32K or bigger, would not read the
    whole record.
===========================================================

    Fixed problems with reading binary files (files opened with
    ACCESS='SEQUENTIAL', FORM='UNFORMATTED', and RECFM='FIXED').
===========================================================

    Fixed problem mixing OS/2 2.0 FORTRAN multithread libraries
    with C multithread libraries.  Also fixed problems with FORTRAN
    multithread libraries.
===========================================================

    Fixed problems using OS/2 2.0 default windowing libraries;
    opening 'CON' would not open another window.
===========================================================

    Fixed problem where BACKSPACE after reaching end-of-file
    would point to the last data record in the file instead of
    the end-file record.
===========================================================

          *************************
          ** FORTRAN 77 Compiler **
          *************************

    Fixed a bug which would cause an erroneous extension message
    to be issued for multiple DATA statements.
===========================================================

    The OS/2-hosted version of the compile and link utility
    ignores the "/p" option. The "/p" option used to invoke
    protected-mode versions of the compiler which were not
    present.
===========================================================

    Added HPFS support to FORTRAN compilers and compile
    and link utilities (WFC*.EXE and WFL*.EXE).
===========================================================

    CHARACTER*(*) arguments in subprograms that had multiple
    entry points would cause the compiler to crash when compiled
    with "/d2" option.
===========================================================

    Calling a COMPLEX statement function more than once from the
    same expression, as in the following example,

    complex f
    f(r) = cmplx( r, 0.0 )
    print *, f(2.0) * f(4.0)
    end

     would produce incorrect results.
===========================================================

          *************
          ** DOS4/GW **
          *************

    Major functionality change:
    DOS/4GW no longer ignores physical memory beyond the 16 MB mark.

    Corrected the following bugs:

    Program hangs in VMM initialization, unless VCPI/DPMI host present.

    On machine with 32MB & EMM386, DOS/4GW finds no memory available.

    LINEXE_LOADER fails on 64MB machine with HIMEM or no mem manager.
    We have fixed a wide range of configuration problems.  In addition,
    this version should make use of all the physical memory in the
    machine, although we know there are still some problems on machines
    with 64MB or more of total memory.  DOS/4GW does not work reliably
    on such machines in combination with HIMEM.SYS and EMM386.EXE; we
    recommend the use of QEMM (or no memory manager) on these machines.

    Int 31h/0204h returns wrong address.

    Chaining from 32-bit handler to previous 16-bit handler crashes.
    Several problems have been fixed with respect to interrupt handling.

    FS, GS not restored by mouse interrupt subroutine.

    Mouse button causes interrupt 0D in Windows DOS box.

    Int 21h/35h returns "thunk" address for 32-bit handlers.

    Pop fs and pop gs exceptions not covered up by kernel.

    WSTUBQ isn't quiet.
===========================================================

          ******************
          ** Disassembler **
          ******************

    The disassembler now ensures that its internal labels
    (L1, L2, etc) do not conflict with any user defined
    labels in the object file.
===========================================================

    The three operand imul instruction did not output its
    operands in the proper order if /au was specified
===========================================================

    HPFS filename support was added.
===========================================================

    Did not always get the size of ".bss" symbols correct
    when /au was specified.
===========================================================

    The disassembler did not properly handle cases when the
    displacement field of an instruction was outside the
    range of a segment. E.g.:

        mov    ax,L1-4[bx]

    where L1 was at the begining of a segment.
===========================================================

          ***************
          ** C Library **
          ***************

    Added Ole32InitClientVtbl for 32-bit OLE support
===========================================================

    The length byte of the command tail was sometimes incorrect
    when spawning a program
===========================================================

    If you closed one of the first 5 files (stdin,stdout,stderr,
    stdprn,stdaux) their FILE struct would never be used again for
    a subsequent open.
===========================================================

    fseek was not positioning to correct position when seeking relative
    to end-of-file under certain conditions.
===========================================================

    _dos_read and _dos_write in the C/386 -3r libraries were not removing
    the last parameter from the stack before returning.
===========================================================

    A change had to be made to the file CRWDATA.OBJ in the
    C library to allow linking with the Microsoft LINK.EXE
    program.
===========================================================

    A new C library function, _splitpath2() has been added that is similar in
    function to _splitpath().  The prototype for _splitpath2() is defined in
    "stdlib.h" and is as follows.

    void _splitpath2( const char *__inp, char *outp,
                   char **__drive, char **__dir, char **__fn, char **__ext );

    __inp    is the path to be processed

    __outp    is a buffer that will contain ALL the components of the
        path, each separated by a null character.  The buffer should
        be defined to be as big as _MAX_PATH2.

    __drive    is the location that is to contain the pointer to the drive
        specification (set by _splitpath2())

    __dir    is the location that is to contain the pointer to the
        directory specification (set by _splitpath2())

    __fn    is the location that is to contain the pointer to the file
        name specification (set by _splitpath2())

    __ext    is the location that is to contain the pointer to the file
        extension specification (set by _splitpath2())

    _splitpath2() was added when HPFS support was added.  In an HPFS, each
    component of the file could be as long as 255.  In addition, the maximum
    length of a filename is 259.  In order to reduce the stack requirements
    when allocating a 256-byte (255 + 1 for null character) buffer for each
    component and calling _splitpath(), you can allocate one 263-byte buffer
    (260 + 3 extra null characters) and call _splitpath2().
===========================================================

    Using the O_NOINHERIT flag in open/sopen in the DOS
    libraries caused fstat to return incorrect information
    in the st_mode field.
===========================================================

    The functions kbhit(), getch(), and putch() now work
    properly in OS/2 2.0.
===========================================================

    WILDARGV didn't work correctly under /mc /mh /ml if the
    near heap ran out while trying to allocate space for the
    file names.  It would write over location ds:0.
===========================================================

    spawnvpe, execvpe and the other related functions did not
    handle long path components in the PATH environment
    variable properly.  (Affects OS/2 mainly).  These routines
    also did not handle long command lines (>128 chars) under
    OS/2.
===========================================================

    _dos functions were not setting errno in the 32-bit Windows
    environment.
===========================================================

    Truncate result of pow in 8087 libraries to be double precision.
===========================================================

          ********************
          ** Code Generator **
          ********************

    Far pointers could cause the 386 code generator to
    become confused when it tried to generate addressing modes
    like GS:[EAX+EDX]. This only applies to 48 bit pointers.
===========================================================

    Fixed problem with instruction scheduler (activated by -or
    and -ox).  Floating point comparisons against memory (FCOMP x)
    are sometimes reordered incorrectly.  The problem only
    occurs when the result of the comparison is used as an
    integer.  The following code revealed the problem.

    extern real v1, v2, v3, v4, v5;
    if (fabs(v1) <= v4 | fabs(v1) >= v2)

    Notice that the | is used instead of ||, forcing the compiler
    to convert the expressions (fabs(v1) <= 4) and (fabs(v1) >=
    v2) to integers and then perform a bitwise-or of the two
    integers.  Had || been used, the problem would not have
    appeared.  Other expressions that could uncover the problem
    are:

        i = v1 != v2;
    ( v1 != v2 ) + 10
    v1 < v2 ? 2 : 3

===========================================================

    If an inline code sequence for a pragma exceeded 32 bytes
    in size and the sequence contained references to global
    or static symbols, then the code generator would page
    fault.
===========================================================

    Conversions from integer to floating point and vice
    versa were optimized out when the source and destination
    were the same location and native 80x87 code generation
    was selected.  For example:

    union {
    float f;
    long i;
    } u;

    u.f = u.i;
===========================================================

    Fixed an "Internal compiler error #40" in the 16 bit
    compilers (wcc wccp wfc wfcp), caused by very complex
    subroutines containing shifts of "long" and "unsigned
    long" values.  The 386 compilers were unaffected.
===========================================================

    Using a 2 parameter intrinsic math function (eg: pow, atan2)
    as a parameter to another 2 parameter intrinsic math function
    could cause the 8087 stack to overflow at runtime. This
    also affects both C and FORTRAN intrinsic functions.
===========================================================

    With the big data models (-mc, -ml, -mh) if the code generator
    decided to cache a static/global variable in a register (-oa)
    and there was no segment register dedicated to pointing at
    the segment that the variable resided in (either -zu or a
    'far' item) then incorrect code could be generated.
===========================================================

    Using far pointers could cause wcc386p/wcc386 to crash.
===========================================================

          ****************
          ** C Compiler **
          ****************

    Compiler did not issue a warning if the address of an auto
    was passed to a function in a small data model and "/zu" option
    was specified.
===========================================================

    Compiler issued a warning when it shouldn't have when assigning
    a non-volatile far or huge pointer to a volatile declared pointer.
===========================================================

    enum's with values greater than 32767 in the real-mode version of
    C/386 (i.e. WCC386.EXE) were not handled correctly.
===========================================================

    Scanner no longer gives "Token truncated" message for tokens that
    are too long and are inside a block of code to be skipped. i.e.
    tokens that are inside a #if 0 block.
===========================================================

    Shift JIS to Unicode translation support has been added to C/386.
    New switch to activate this support is -zk0u.
===========================================================

    Problems occur when a function is inlined in the second or third
    parts of a "for" statement using the -oe option.
===========================================================

    Issue "Constant truncated" warning for "|=" and "^=" if constant
    is larger than the type of the left hand side. e.g.
        unsigned short us;
    us |= 0x00010000;
===========================================================

    Added #pragma disable_message(num,num,...) so that you can
    selectively disable individual errors and warnings.
    The #pragma enable_message(num,num,...) directive can be
    used to enable them again.
===========================================================

    Tail recursive functions that are inlined jump to the wrong label.
===========================================================

    #pragma off/on(reuse_duplicate_strings) added. Default is on.
===========================================================

    The "-bt[=<os>]" (build target) switch has been added to the C compiler.
    This switch is used for cross-development work. It prevents the compiler
    from defining the default system macro (which is based on the host
    system the compiler is running on) and instead defines a macro
    consisting of the string "<os>" converted to uppercase and prefixed
    and suffixed with two underscores. E.g, specifying the switch:

        -bt=foo

    would cause the compiler to define the macro

    __FOO__

    and prevent it from defining "MSDOS" if the compiler was being run under
    DOS, "__OS2__" if using the OS/2 hosted compiler, or "__QNX__" if using
    the QNX hosted version. Any string consisting of letters, digits, and
    the underscore character may be used for the system name. Also,
    several system names are recognized by the compiler and perform
    additional operations.

    System name        Additional operation
    ===========        ====================

    dos            Defines the macro "MSDOS".

    windows            Same as specifying the -zw switch.
                The 32-bit compiler additionally defines
                the macro "__WINDOWS_386__".

    netware            (32-bit compiler only) Causes the compiler
                to use stack based calling conventions
                unless overridden by the -3r or -4r switches.
                Also defines the macro "__NETWARE_386__".

    penpoint        (32-bit compiler only) Causes the compiler
                to use stack based calling conventions
                unless overridden by the -3r or -4r switches.


    Specifying -bt with no system name following restores the default system
    name.
===========================================================

    HPFS support has been added to the C compiler and the
    compile and link utilities (WCC*.EXE & WCL*.exe).
===========================================================

    The compiler was not automatically making static functions
    near calls where possible in big code models.
===========================================================

    The real mode DOS compilers (WCC.EXE, WCC386.EXE)
    could crash after issuing a FATAL message from the
    code generator.
===========================================================

    The OS/2 2.0 C libraries were not handling the conversion
    of far16 pointers to and from near pointers when the
    pointers were NULL.
===========================================================

    Report an error if an item over 64K in size is not
    marked as huge in the 16-bit compilers.
===========================================================

    Ignore the #ident directive for UNIX compatability unless
    the /za switch is set.
===========================================================

    Fixed problem with *L"\x0109" so that it picks up an unsigned
    short rather than just a byte.
===========================================================

    Compiler did not diagnose a parameter count mismatch error when
    a call with one or more parameters is made to a function that is
    defined in the same module with no parameters.
===========================================================

    Compiler did not diagnose attempts to modify const typedef items
    when compiling with -d2.
===========================================================