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whatsnew.txt
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1996-07-10
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WHATSNEW.TXT Copyright (c) 1995,96 xTech Ltd
----------------------------------------------------------------
Native XDS-x86 OS/2 Edition
---------------------------
v2.17 (pre-release)
Fixes And New Features
Version 2.17
------------
This version is the last freely available before commercial release.
The following changes were made since previous releases (2.10 and 2.12):
Compiler:
A number of bugs fixed
SYM-FILE VERSION CHANGED - RECOMPILATION IS NECESSARY
Pentium instruction scheduling implemented
A number of floating-point optimizations introduced
Integer division by constant is now replaced with multiplication
Long file names support (see the FATFS option)
xc =m <file> now calls linker if <file> is a Modula-2 program
module or an Oberon-2 main module (option MAIN is on)
The SYSTEM.REF procedure was added (the same as ADR, but returns
typized pointer.
Compatibility rules for foreign procedures are relaxed further
(see User's Guide->Multilanluage Programming->Relaxation of
compatibility rules).
Much more efficient (but still not ideal) code is generated
for aggregate constants.
Equations and environment variables may be used in redirections:
*.sym = $(XDSDIR)/sym
Separate exception source for ASSERT added
Compiler sets new equations:
MODULE (name of the current module)
FILE (name of the current file)
Compiler exit code is now either 0 (ok) or 1 (error).
SYSTEM.FILL is added
<type>(<const>) is now equivalent to SYSTEM.CAST(<type>,<const>)
VIO option introduced in xc.cfg
BOOLEAN, SYSTEM.BOOL8 and SYSTEM.BOOL32 are much more compatible
SYSTEM.M2ADR is available from Oberon-2
CODENAME and DATANAME equations for segment names
CPU486 is replaced with CPU and MINCPU
It is now possible to declare/set equations in source text
ALIGNMENT is an inlineable equation now
DEF option is renamed to CHANGESYM to avoid conflicts
Library:
Some bugs fixed
Added module Printf
ISO modules LowReal, LowLong are implemented
ProgEnv.String and ProgEnv.StringLength are implemented
TopSpeed-like library is partially implemented
IDE:
Plenty of bugs fixed
New concepts introduced: tools, workplaces, and stylesheets.
Refer to the on-line help for more information.
A number of text editing features introduced (see Keys Help).
A number of menu commands introduced (press F1 on menu items).
Files are opened using redirections and lookups if typed without
path
IDE maintains a list of source files which are either specified
by user or received from the compiler.
Project file editor:
a number of bug fixes
user options/equations
lookups
OS2.DEF:
Some bugs fixed
Formatting slightly improved
Some pointer type parameters changed to VAR-parameters and
arrays according to an API call semantics.
Some negative constants replaced with large positive
Doc:
ISO Modula-2 Library Reference added
ISO Modula-2 Lexis and Syntax added
RegComp.Substitute description is corrected
Samples:
The PMHello sample removed
New samples:
LinPack benchmark
FindProc IDE tool
Mandelbrodt Set Explorer for PM
Version 2.10
------------
This is the first product version of Native XDS for OS/2. After more
then half a year of extensive testing we are happy to announce this
product.
For the users of XDS v2.06 we list the differences between v2.06
and v2.10. Note: there are no product versions such as v2.07,
v2.08, v2.09. The version v2.07 was used internally and
distributed as beta and demo version.
What is new in v2.10:
1) Extended syntax of conditional expressions, e.g:
<* IF defined cc & (cc = Watcom) THEN *>
See "Configuring XDS" and "Conditional compilation".
2) Relaxed compatibility rules are introduced for
parameters of "C" procedures. See "Multilanguage
programming".
3) String literal may be used in a direct language
specification instead of numeric values:
"Oberon" = 0
"Modula" = 1
"C" = 2
"Pascal" = 5
"StdCall" = 7 (Win32 standard calling convention)
"SysCall" = 8 (OS/2 system calls)
4) new equations
COMPILERHEAP - defines compiler heap limit
COMPILERTHRES - defines compiler threshold
5) New clause in the ERRFMT equation - errno (error
number).
6) new option M2UNPACKTYPES - for Windows interface
7) new ALIGNMENET option
8) equation declaration syntax is introduced:
-xxx!value
9) Make does not use dependency on a project file.
10) New directives may be used in configuration, redirection
project and template files:
!if expr then
!elsif expr then
!else
!end
!message expr
expr = simple [ ("=" | "#" | "<" | ">") simple ]
simple = term { "+" | "OR" term }
term = factor { "AND" factor }
factor = "(" expr ")"| quoted_string
| "NOT" factor | "DEFINED" ident | ident
ident = option | equation
11) In all system files:
\ at the end of line - line continuation.
$! - denotes the directory name of this file:
*.sym = $!/sym;
12) new template syntax (See "Template files").
[end of document]