==============================================================================
README.270                                                         11-Jul-1995
==============================================================================

This is GCC 2.7.0 for emx.  It is packaged as follows:

  README.270            This file
  gcc270b1.zip          Binaries, part 1 (C)
  gcc270b2.zip      (*) Binaries, part 2 (C++ and Objective C)
  gcc270d.zip           Documentation
  gcc270p.zip       (*) Patches
  gcc270s1.zip          Source code (patched), part 1
  gcc270s2.zip      (*) Source code (patched), part 2
  gcc270s3.zip          Source code (patched), part 3

  lib270b.zip           libg++ 2.7.0 (binaries, headers, and documentation)
  lib270p.zip           libg++ 2.7.0 (patches)
  lib270s.zip           libg++ 2.7.0 (patched source code, requires HPFS)


Installation
------------

  cd \
  emxload -qw
  del emx\lib\gpp.a
  del emx\lib\gpp.lib
  del emx\lib\iostream.a
  del emx\lib\iostream.lib
  rm -r emx\include\cpp
  unzip -o a:gcc270b1
  unzip -o a:gcc270b2
  unzip -o a:lib270b
  emxomf -s -l emx\lib\gpp.a
  emxomf -s -l emx\lib\stdcpp.a

See \emx\doc\install.doc for how to create and view the manuals.


Release notes
-------------

- The files marked (*) have been updated on 11-Jul-1995 to fix a bug:
  the `bool' type was implemented as a 32-bit type instead of a 8-bit
  type

- g77 is not yet supported

- Linking with some C++ libraries created with GCC 2.6.3 will fail due
  to undefined symbols.  For instance, this happens for TOUCH-GUI.
  You have to wait until the affected libraries are compiled with GCC
  2.7.0

- See \emx\doc\NEWS.GCC for more information

- The GNU iostream library (iostream.a) has been replaced with the GNU
  stdc++ library (stdcpp.a)

- ios::binary (and ios::bin, which is just an alias) is now supported

- Library support for C++ exceptions is provided by emxfix06.zip

- Throwing a C++ exception does not remove OS/2 exception handlers.
  For now, don't install OS/2 exception handlers in functions which can
  be terminated by throwing a C++ exception


Legal stuff
-----------

GCC is distributed under the terms of the GPL (see COPYING).

libg++ is distributed under the terms of the LGPL (see COPYING.LIB).

libstdc++ is distributed under the terms of the GPL (see COPYING), but
modified with the following:

    As a special exception, if you link this library with files
    compiled with a GNU compiler to produce an executable, this does not cause
    the resulting executable to be covered by the GNU General Public License.
    This exception does not however invalidate any other reasons why
    the executable file might be covered by the GNU General Public License.

A few source files and subroutines are covered by other (but
less restrictive) copyright conditions.  E.g. some code (such
as iovfprintf.c) is based on software that was developed by the
University of California, Berkeley, for the Berkeley Software
Distribution (BSD-4.4), and bears their copyright;  and one
file (floatconv.c) is derived from ("free") code copyrighted AT&T.


Rebuilding libstdc++
--------------------

If you want to rebuild stdpp.a, type the following commands:

  cd \emx\include\cpp
  hpfs
  cd \emx\gnu\libg++-2.7.0\libc++
  del *.o *.a
  dmake
  copy libstdc++.a \emx\lib\stdpp.a


Rebuilding libg++
-----------------

If you want to rebuild gpp.a, type the following commands:

  cd \emx\include\cpp
  hpfs
  cd \emx\gnu\libg++-2.7.0\libg++\src
  del libgpp.a
  dmake
  ar s libgpp.a
  copy libgpp.a \emx\lib\gpp.a

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