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-<!-- $Id$ -->
-
-<html>
- <head>
- <title>ACE Subsets</title>
- <link rev=made href="mailto:ace-users@cs.wustl.edu">
- </head>
-
-<body text = "#000000"
- link="#000fff"
- vlink="#ff0f0f"
- bgcolor="#ffffff">
-
-<hr><p>
-<font size=+2><strong>Contents</strong></font>
-<ol>
- <li><a href="#Motivation">Motivation for Splitting ACE into Multiple
- Libraries</a>
- <li><a href="#Configuration Management">Configuration Management</a>
- <li><a href="#Classes">Classes in Each ACE Library Subset</a>
- <li><a href="#Status">Current ACE Subsetting Status</a>
- <li><a href="#ACE Library Size Breakdown">ACE Library Size Breakdown</a>
- <li><a href="#Building ACE Subsets">Building ACE Subsets</a>
- <li><a href="#ACE_OS Adaptation Layer">ACE_OS Adaptation Layer</a>
- <li><a href="#minimumTAO">Minimum TAO</a>
-</ol><p>
-
-
-<hr><p>
-<h3><a name="Motivation">Motivation for Splitting ACE into Multiple
- Libraries</a></h3>
-
-This document describes how we are splitting ACE into multiple
-libraries, each of which will contain a smaller subset of the overall
-ACE functionality. The primary motivations for subsetting ACE are:
-
-<UL>
-<LI><EM>Principle of parsimony</EM> -- <EM>i.e.</EM>, developers
- should incur time/space overhead for components they use, rather
- than for all the components in the ACE framework. <P>
-
-<LI><EM>Simplify the learning curve</EM> -- <EM>i.e.</EM>, developers
- only need to learn how to program components that they actually
- use. <P>
-</UL>
-
-The main design goals of our approach are as follows: <P>
-
-<OL>
-<LI>Support the original libACE as before. Thus, for users who
-want to use the existing ACE library as is, there will be
-no changes, i.e., just link with <CODE>libACE</CODE> as usual. <P>
-
-<LI>Allow ACE (and TAO) programmers to use smaller subsets of the
-entire <CODE>libACE</CODE> library. These subsets will include the
-following libraries: <P>
-
-<DL>
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_OS</CODE> -- This library contains the OS adaptation
-layer and its supporting classes. All other ACE libraries will depend
-on <CODE>libACE_OS</CODE> and it will depend on <EM>no</EM> other ACE
-libraries. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Utils</CODE> -- This library contains the various ACE
-container classes and other miscellaneous classes, such as Singleton,
-auto_ptr, timers, etc. This library will depend only on
-<CODE>libACE_OS</CODE>.<P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Logging</CODE> -- This library contains the various ACE
-logging and tracing classes. This library will depend only on
-<CODE>libACE_OS</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Threads</CODE> -- This library contains the ACE
-thread/process management and synchronization classes. This library
-will depend only on <CODE>libACE_OS</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Demux</CODE> -- This library contains the ACE Reactor and
-Proactor classes. This library will depend on <CODE>libACE_OS</CODE>
-and <CODE>libACE_Thread</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Connection</CODE> -- This library contains the ACE
-Connection components, i.e., Acceptor, Connector, and Svc_Handler.
-This library will depend on <CODE>libACE_OS</CODE>,
-<CODE>libACE_Thread</CODE>, and <CODE>libACE_Demux</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Sockets</CODE> -- This library contains the ACE C++
-wrappers for sockets. This library will depend on
-<CODE>libACE_OS</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_IPC</CODE> -- This library contains all the ACE C++
-wrappers for the other types of IPC and FILE I/O other than sockets.
-This library will depend on <CODE>libACE_OS</CODE> and
-<CODE>libACE_Sockets</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Svcconf</CODE> -- This library contains the ACE C++
-wrappers for the Service Configurator. This library will depend on
-<CODE>libACE_OS</CODE>, <CODE>libACE_Demux</CODE>,
-<CODE>libACE_Thread</CODE>, and <CODE>libACE_Sockets</CODE>. <P>
-
-<DT> <img alt="o" src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Streams</CODE> -- This library contains the ACE Streams
-classes. This library will depend on <CODE>libACE_OS</CODE>,
-<CODE>libACE_Demux</CODE>, and <CODE>libACE_Thread</CODE>. <P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Memory</CODE> -- This library contains the ACE C++
-wrappers for shared memory and memory-mapped files. This library will
-depend on <CODE>libACE_OS</CODE>.<P>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Token</CODE> -- This library contains the ACE C++
-wrappers for token support. This library is not needed by
-<a href="http://www.cs.wustl.edu/~schmidt/TAO.html">TAO</a>.<p>
-
-<DT> <img alt="o"
-src="http://www.cs.wustl.edu/~schmidt/gifs/misc/redball.gif">
-<CODE>libACE_Other</CODE> -- This library contains miscellaneous code,
-primarily including a CORBA interface and naming support. It is not
-actively supported, and is not needed by <a
-href="http://www.cs.wustl.edu/~schmidt/TAO.html">TAO</a>. Its
-functionality is included in TAO.<P>
-
-</DL>
-</OL>
-
-In addition, we will create <CODE>libACE_TAO</CODE>, which contains
-just the core set of components in ACE that are required to support
-TAO. This library is targeted at embedded systems developers who want
-to minimize the footprint of ACE+TAO. We are also planning to support
-the OMG's <A
-HREF="http://www.omg.org/cgi-bin/doc?orbos/98-08-04.pdf">Minimum
-CORBA</A> specification as part of a separate effort. Preliminary
-results of prototypes for Minimum CORBA we've integrate to TAO have
-been very promising, yielding a 40% reduction in ORB footprint. <P>
-
-Note that the ACE library subsets described above are intended as a
-guideline, <EM>not</EM> a complete specification. The actual
-partitioning of files in the final ACE library subsets may differ
-somewhat to improve footprint and simplify common use-cases. <P>
-
-<hr><p>
-<h3><a name="Configuration Management">Configuration Management</a></h3>
-
-Configuration management for the ACE library subsets described above
-will be organized as follows:
-
-<OL>
-<LI>A single source tree with a single "version" for the source
- tree.<P>
-
-<LI>Releases of libACE and its "subsets" will be atomic, <EM>i.e.</EM>,
- all or nothing.<P>
-</OL>
-
-
-<hr><p>
-<h3><a name="Classes">Classes in Each ACE Library Subset</a></h3>
-
-Below, we describe the classes in each ACE library subset.
-
-<H4>libACE_OS</H4>
-
-This library contains the OS adaptation layer and its supporting
-classes. The classes in this library should not depend on any other
-ACE library subsets. All of the other libraries will depend on this
-library. The following classes are included in this library.
-
-<PRE><CODE>
-config.h
-Basic_Types
-OS
-Sched_Params
-</code></pre>
-
-<H4>libACE_Utils</H4>
-
-This library contains the following ACE container classes and other
-miscellaneous classes.
-
-<PRE><CODE>
-ACE
-Active_Map_Manager
-Arg_Shifter
-ARGV
-Containers
-Dirent
-Dynamic
-Filecache
-Functor
-Get_Opt
-Hash_Map_Manager
-High_Res_Timer
-Method_Request
-Object_Manager
-Profile_Timer
-Registry
-SString
-Stats
-System_Time
-Time_Request_Reply
-Timeprobe
-Timer_Hash
-Timer_Heap
-Timer_List
-Timer_Queue
-Timer_Wheel
-</code></pre>
-
-<H4>libACE_Logging</H4>
-
-This library contains the various ACE logging and tracing classes.
-
-<PRE><CODE>
-Dump
-Log_Msg
-Log_Record
-Trace
-</code></pre>
-
-<H4>libACE_Threads</H4>
-
-This library contains the ACE thread/process management and
-synchronization classes.
-
-<PRE><CODE>
-Activation_Queue
-Process
-Process_Manager
-Synch
-Synch_Options
-Thread
-Thread_Manager
-Token
-</code></pre>
-
-<H4>libACE_Demux</H4>
-
-This library contains the ACE Reactor and its associated classes,
-including the ACE Connection components.
-
-<PRE><CODE>
-Event_Handler
-Handle_Set
-POSIX_Proactor
-Priority_Reactor
-Proactor
-Reactor
-Select_Reactor
-Select_Reactor_Base
-WFMO_Reactor
-</code></pre>
-
-<H4>libACE_Connection</H4>
-
-This library contains the ACE Connection components, i.e., Acceptor,
-Connector, and Svc_Handler.
-
-<PRE><CODE>
-Asynch_IO
-Asynch_IO_Impl
-POSIX_Asynch_IO
-Strategies
-</code></pre>
-
-<H4>libACE_Sockets</H4>
-
-This library contains the ACE C++ wrappers for sockets.
-
-<PRE><CODE>
-IPC_SAP
-LSOCK
-LSOCK_Acceptor
-LSOCK_CODgram
-LSOCK_Connector
-LSOCK_Dgram
-LSOCK_Stream
-SOCK
-SOCK_Acceptor
-SOCK_CODgram
-SOCK_Connector
-SOCK_Dgram
-SOCK_Dgram_Bcast
-SOCK_Dgram_Mcast
-SOCK_IO
-SOCK_Stream
-</code></pre>
-
-<H4>libACE_IPC</H4>
-
-This library contains all the ACE C++ wrappers for the other types of
-IPC and FILE I/O other than sockets. This library will depend on the
-<CODE>libACE_Socket</CODE> library.
-
-<PRE><CODE>
-Addr
-DEV
-DEV_Addr
-DEV_Connector
-DEV_IO
-FIFO
-FIFO_Recv
-FIFO_Recv_Msg
-FIFO_Send
-FIFO_Send_Msg
-FILE_Addr
-FILE
-FILE_Connector
-FILE_IO
-INET_Addr
-IO_SAP
-IOStream
-Pipe
-Signal
-SPIPE_Addr
-SPIPE
-SPIPE_Acceptor
-SPIPE_Connector
-SPIPE_Stream
-SV_Message
-SV_Message_Queue
-SV_Semaphore_Complex
-SV_Semaphore_Simple
-SV_Shared_Memory
-TLI
-TLI_Acceptor
-TLI_Connector
-TLI_Stream
-TTY_IO
-UNIX_Addr
-UPIPE_Acceptor
-UPIPE_Connector
-UPIPE_Stream
-</code></pre>
-
-<H4>libACE_Svcconf</H4>
-
-This library contains the ACE C++ wrappers for the Service
-Configurator component.
-
-<PRE><CODE>
-DLL
-Parse_Node
-Service_Config
-Service_Manager
-Service_Object
-Service_Repository
-Service_Types
-Shared_Object
-Svc_Conf_l
-Svc_Conf_y
-</code></pre>
-
-<H4>libACE_Streams</H4>
-
-This library contains the ACE Streams classes.
-
-<PRE><CODE>
-CDR_Stream
-Message_Block
-Message_Queue
-Task
-</code></pre>
-
-<H4>libACE_Memory</H4>
-
-This library contains the ACE C++ wrappers for shared memory and
-memory-mapped files.
-
-<PRE><CODE>
-Malloc
-Mem_Map
-Memory_Pool
-Obstack
-Read_Buffer
-Shared_Memory
-Shared_Memory_MM
-Shared_Memory_SV
-</code></pre>
-
-<H4>libACE_Token</H4>
-
-This componenty contains the ACE C++ wrappers for Token classes.
-
-<pre><code>
-Local_Tokens
-Remote_Tokens
-Token_Collection
-Token_Invariants
-Token_Manager
-Token_Request_Reply
-</code></pre>
-
-<H4>libACE_Other</H4>
-
-This component contains miscellaneous ACE C++ wrappers.
-
-<pre><code>
-CORBA_Handler
-CORBA_Ref
-Local_Name_Space
-Msg_WFMO_Reactor
-Name_Proxy
-Name_Request_Reply
-Name_Space
-Naming_Context
-Registry_Name_Space
-Remote_Name_Space
-TP_Reactor
-XtReactor
-</code></pre>
-
-<hr><p>
-<h3><a name="Status">Current ACE Subsetting Status</a></h3>
-
-The ACE subsetting effort has identified a few areas for
-improvement. These will be addressed in the future:<p>
-
- <ul>
- <li>Log_Msg cleanup: We have a good start on this, but it needs work
- to finish. It might be easiest to make an abstract
- base class, then have ACE_Log_Msg derive from it. That way
- we could remove the exposure of all the #includes in Log_Msg.cpp
- to applications that don't need it. Another alternative would
- be to disable compilation of Log_Msg.cpp when ACE_NLOGGING is
- enabled.<p>
-
- <li>Higher layer interdependencies: we haven't exhaustively
- tested all possible combinations of subsets. It's possible
- that there are interdependencies between some layers that
- we haven't yet identified.<p>
-
- <li>Remove use of multiple inheritance: its only used in a few
- places, in one of the SOCK classes and Service Config. This
- isn't really a subsetting problem, but is necessary to
- support Embedded C++.<p>
- </ul><P>
-
-
-<hr><p>
-<h3><a name="ACE Library Size Breakdown">ACE Library Size Breakdown</a></h3>
-
-Here is an example size breakdown, by ACE library component. It is
-for the ACE 5.0 libACE.a, statically built with these <a
-href="http://www.cs.wustl.edu/~schmidt/ACE_wrappers/ACE-INSTALL.html#flags">make
-flags</a>:
-<pre><code>
- debug=0 optimize=1 static_libs_only=1 DEFFLAGS=-DACE_USE_RCSID=0
-</code></pre><p>
-
-To build an ACE static library, if shared libraries are the default, use
-<code>make static_libs_only=1</code>. If you're using recent versions
-of GNU GCC, you can use the <A
- HREF="../ACE-INSTALL.html#repo">-frepo</A>
-option, which typically reduces the footprint by another 25 percent. <P>
-
-<center><table cellpadding=4 border=4>
- <tr>
- <th>Platform
- <th>Component
- <th>Total
- <th>For TAO<br>subset
- <th>OS
- <th>Utils
- <th>Logging
- <th>Threads
- <th>Demux
- <th>Con-<br>nection
- <th>Sockets
- <th>IPC
- <th>Svcconf
- <th>Streams
- <th>Memory
- <th>Token
- <th>Other
- <tr>
- <th rowspan=2>Linux (RedHat 6.0/Intel)<br>egcs 2.91.66
- <th>Size, bytes
- <td align=center>648727
- <td align=center>515501
- <td align=center>10937
- <td align=center>118305
- <td align=center>13544
- <td align=center>59593
- <td align=center>74629
- <td align=center>49933
- <td align=center>16084
- <td align=center>34820
- <td align=center>92192
- <td align=center>18462
- <td align=center>27002
- <td align=center>71574
- <td align=center>61652
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>79.46
- <td align=center>1.69
- <td align=center>18.24
- <td align=center>2.09
- <td align=center>9.19
- <td align=center>11.50
- <td align=center>7.70
- <td align=center>2.48
- <td align=center>5.37
- <td align=center>14.21
- <td align=center>2.85
- <td align=center>4.16
- <td align=center>11.03
- <td align=center>9.50
-
- <tr>
- <th rowspan=2>LynxOS 3.0.0<br>g++ 2.7-97r1
- <th>Size, bytes
- <td align=center>582672
- <td align=center>475216
- <td align=center>25620
- <td align=center>97220
- <td align=center>11000
- <td align=center>44192
- <td align=center>71388
- <td align=center>58100
- <td align=center>13120
- <td align=center>31572
- <td align=center>77972
- <td align=center>21468
- <td align=center>23564
- <td align=center>60832
- <td align=center>46624
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>81.56
- <td align=center>4.40
- <td align=center>16.69
- <td align=center>1.89
- <td align=center>7.58
- <td align=center>12.25
- <td align=center>9.97
- <td align=center>2.25
- <td align=center>5.42
- <td align=center>13.38
- <td align=center>3.68
- <td align=center>4.04
- <td align=center>10.44
- <td align=center>8.00
-
- <tr>
- <th rowspan=2>SunOS5.7<br>egcs 2.91.60
- <th>Size, bytes
- <td align=center>709543
- <td align=center>570693
- <td align=center>11877
- <td align=center>115306
- <td align=center>13721
- <td align=center>63027
- <td align=center>87962
- <td align=center>68551
- <td align=center>16917
- <td align=center>42954
- <td align=center>99839
- <td align=center>21357
- <td align=center>29182
- <td align=center>75970
- <td align=center>62880
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>80.43
- <td align=center>1.67
- <td align=center>16.25
- <td align=center>1.93
- <td align=center>8.88
- <td align=center>12.40
- <td align=center>9.66
- <td align=center>2.38
- <td align=center>6.05
- <td align=center>14.07
- <td align=center>3.01
- <td align=center>4.11
- <td align=center>10.71
- <td align=center>8.86
-
- <tr>
- <th rowspan=2>SunOS 5.7<br>GreenHills 1.8.9
- <th>Size, bytes
- <td align=center>803651
- <td align=center>653787
- <td align=center>15800
- <td align=center>146633
- <td align=center>18544
- <td align=center>69172
- <td align=center>103584
- <td align=center>60580
- <td align=center>23084
- <td align=center>52986
- <td align=center>108200
- <td align=center>21528
- <td align=center>33676
- <td align=center>79324
- <td align=center>70540
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>81.35
- <td align=center>1.97
- <td align=center>18.25
- <td align=center>2.31
- <td align=center>8.61
- <td align=center>12.89
- <td align=center>7.54
- <td align=center>2.87
- <td align=center>6.59
- <td align=center>13.46
- <td align=center>2.68
- <td align=center>4.19
- <td align=center>9.87
- <td align=center>8.78
-
- <tr>
- <th rowspan=2>SunOS 5.7<br>Sun C++ 4.2
- <th>Size, bytes
- <td align=center>626824
- <td align=center>494501
- <td align=center>15502
- <td align=center>64929
- <td align=center>15605
- <td align=center>63364
- <td align=center>106841
- <td align=center>55013
- <td align=center>19945
- <td align=center>73584
- <td align=center>46434
- <td align=center>19685
- <td align=center>25952
- <td align=center>69843
- <td align=center>62480
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>78.89
- <td align=center>2.47
- <td align=center>10.36
- <td align=center>2.49
- <td align=center>10.11
- <td align=center>17.04
- <td align=center>8.78
- <td align=center>3.18
- <td align=center>11.74
- <td align=center>7.41
- <td align=center>3.14
- <td align=center>4.14
- <td align=center>11.14
- <td align=center>9.97
-
- <tr>
- <th rowspan=2>VxWorks 5.3.1<br>GreenHills 1.8.8
- <th>Size, bytes
- <td align=center>689564
- <td align=center>542628
- <td align=center>22252
- <td align=center>145036
- <td align=center>19664
- <td align=center>63640
- <td align=center>54296
- <td align=center>980
- <td align=center>22120
- <td align=center>47468
- <td align=center>117932
- <td align=center>23220
- <td align=center>27220
- <td align=center>78900
- <td align=center>68036
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>78.69
- <td align=center>3.23
- <td align=center>21.03
- <td align=center>2.85
- <td align=center>9.23
- <td align=center>7.87
- <td align=center>0.14
- <td align=center>3.21
- <td align=center>6.88
- <td align=center>17.10
- <td align=center>3.37
- <td align=center>3.95
- <td align=center>11.44
- <td align=center>9.87
-
- <tr>
- <th rowspan=2>VxWorks 5.3.1<br>g++ cygnus-<br>2.7.2-960126<br>
- (with implicit templates)
- <th>Size, bytes
- <td align=center>1051540
- <td align=center>888244
- <td align=center>36484
- <td align=center>140832
- <td align=center>14344
- <td align=center>66740
- <td align=center>266192
- <td align=center>14480
- <td align=center>15084
- <td align=center>106308
- <td align=center>142500
- <td align=center>55932
- <td align=center>29348
- <td align=center>88564
- <td align=center>74732
- <tr>
- <th>Percentage of<br>total size
- <td align=center>100
- <td align=center>84.47
- <td align=center>3.47
- <td align=center>13.39
- <td align=center>1.36
- <td align=center>6.35
- <td align=center>25.31
- <td align=center>1.38
- <td align=center>1.43
- <td align=center>10.11
- <td align=center>13.55
- <td align=center>5.32
- <td align=center>2.79
- <td align=center>8.42
- <td align=center>7.11
-</table></center><p>
-
-
-<hr><p>
-<h3><a name="Building ACE Subsets">Building ACE Subsets</a></h3>
-
-By default, the ACE library contains all of the components that ACE
-currently supports. To reduce build time and library size, you can
-exclude unused components. To do that, define an
-<code>ACE_COMPONENTS</code> variable using one of these approaches:<p>
-
-<ol>
- <li>In your <code>$(ACE_ROOT)/include/makeinclude/platform_macros.GNU</code>
- file, <em>e.g.</em>, add:
- <pre><code>ACE_COMPONENTS = OS</code></pre>or<p>
-
- <li>On the make command line, <em>e.g.</em>,
- <pre><code>make ACE_COMPONENTS=OS</code></pre>or<p>
-
- <li>Set (and export) the <code>ACE_COMPONENTS</code> environment variable
- to contain the components that you want to build.<p>
-</ol><p>
-
-Please see <code><a href="../ace/Makefile">../ace/Makefile</a></code>
-for the default contents of <code>ACE_COMPONENTS</code>.<p>
-
-A special value of <code>ACE_COMPONENTS</code> can be used to
-build an ACE library that supports
-<a href="http://www.cs.wustl.edu/~schmidt/TAO.html">TAO</a>. The
-special value is <code>FOR_TAO</code>. So, for example, you can
-add this to your
-<code>$(ACE_ROOT)/include/makeinclude/platform_macros.GNU</code>
-to restrict ACE support to just that which is needed for TAO:
-<pre><code>
-ACE_COMPONENTS = FOR_TAO
-</code></pre><p>
-
-Please note the current limitations:<p>
-
-<ol>
- <li>We currently don't check for interdependencies between components.
- For example, if you build any component beside <code>OS</code>, you
- must explicitly include <code>OS</code> in your
- <code>ACE_COMPONENTS</code>.<p>
-
- <li>We currently don't check this macro in other ACE or TAO Makefiles, or
- in their tests. We'll add those checks as time allows.</li>
-</ol>
-
-
-<hr><p>
-<h3><a name="ACE_OS Adaptation Layer">ACE_OS Adaptation Layer</a></h3>
-
-The lowest-level component, <code>OS</code>, is also called the
-<em>ACE_OS adaption layer</em>. It provides the ACE interface to
-the underlying operating system, but little else. It can be used
-standalone.<p>
-
-To create the ACE_OS adaptation layer, build your <code>libACE</code>
-with <code>ACE_COMPONENTS</code> set to <code>OS</code>. In addition,
-add <code>#include "ace/config-minimal.h"</code> to your
-<code>ACE_wrappers/ace/config.h</code> file.<p>
-
-When using the ACE_OS adaptation layer, you'll be limited to the
-the <code>ACE_OS</code> member functions, ACE's
-<a href="../ace/Basic_Types.h">Basic_Types</a> and
-<a href="../ace/Sched_Params.h">Sched_Params</a>, and macros defined in
-<a href="../ace/OS.h"><code>ace/OS.h</code></a>. See ACE's
-<a href="../tests/Basic_Types_Test.cpp">Basic_Types_Test.cpp</a>
-for an example of usage.<p>
-
-<HR><P>
-
-<a name="minimumTAO"><!--#include virtual="../TAO/docs/minimumTAO.html" --></a>
-
-Back to the <A HREF="http://www.cs.wustl.edu/~schmidt/ACE.html">ACE</A>
-home page.
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