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贡献一份commoncpp2,有兴趣的可以研究一下

This directory contains the initial testing release of GNU Common C++
"2" 1.1.  This release is provided for testing and development and in
many ways represents a significient refinement of the prior GNU Common
C++ "2" (1.0.x) releases.

Few functional class changes in behavior exist in 1.1 vs 1.0.  However,
many classes have been cleaned up to use const correctly, and this may
impact other people's code not written with this consideration.

Many bugs were found and fixed between 1.0.13 and 1.1, and this alone 
represents a worthwhile change for testing.  It is believed 1.1 is 
actually cleaner and more stable than 1.0 at this time.

One important change in 1.1 is the new ost "String" class.  This is 
meant to be a smart and thread-aware string class that is capable of
re-allocating existing memory where possible rather than always 
allocating through the heap.  The idea here was to improve performance 
as well as address other threading issues overlooked in std::string.

All classes in 1.1 are implimented for both w32 and posix targets and
behavior should be more consistent for porting code.  In the 1.0
releases there were a number of classes which were never implimented for
w32 native builds, such as MappedFiles, etc.

Many classes have been expanded.  This is especially true of the Dir and 
File classes, which now have many more member functions and greater 
usability, as well as the Process class.

An overview document formatted in texinfo is provided which provides a
good overview and summary of GNU Common C++ usage, features, and
functions.  Extensive class-by-class functional documentation is also
provided in browsable form in the "doc" directory.  This documentation 
will be automatically generated for you during "make" if you have 
doxygen already installed.

GNU Common C++ is normally built and installed as a set of shared object
libraries and header files.  These libraries and headers are installed
using directories selected through a "configure" script that has been
prepared with automake and autoconf.  As such, they should build and
install similarly to and in a manner compatible and consistent with most
other GNU software.

GNU Common C++ is free software licensed under the terms of the GNU Public
License.  See the file COPYING.TXT for copying conditions. Please also
note that additional priviledges currenly apply to the use of Common C++
as noted in each and every source file.  These privileges are similar to
the terms Guile is licensed under and constitute priviliges similar to the
LGPL.

Any comments, questions, patches, and/or bug reports should be sent to
"[e-mail]".