🚀 go-pugleaf

A patch to gcc 2.0 providing limited argument checking for xv_set and
xv_create (like gcc 2.0 already does for *printf and *scanf), is
available by anonymous ftp.  See the README file, which is included
below.

Warning: I began working on the patch yesterday...

***********************************************************************

XView support for gcc:
----------------------

HISTORY:

Inspired by the way gcc now checks the arguments to printf and scanf
family of varargs functions, I decided to try to implement similar
support for the xv_set and xv_create functions used by the XView
graphical toolkit.  

* Version 0.0 alpha for gcc-2.0
It now finds the single (harmless) error in Ftptool 4.1, and does not
crash in the process, so I will let it go.  Use on your own risk.

Version 0.0 alpha should work with XView 3.0 or older.  Future
versions of XView will most likely cause "-Wxview" and "-Wxview-type"
to generate more spurious warnings.

DESCRIPTION:

Add two new warning to gcc.  They are both disabled by defaults.

"-Wxview": Generate warnings if xv_set or xv_create are called with
the wrong number of arguments, if a XView attribute is not an integer
constant, or if any argument is more than 32 bit wide.

"-Wxview-type": Generate warnings if an argument to an XView attribute
is not of the expected type.  Distinguishes between three types:
integer, pointer, and opaque, where opaque can match any type.  May
generate spurious warnings, since the XView include files contains
incorrect type information for many attributes.  Does not work without
"-Wxview".

PROBLEMS:

- Does not support xv_get or xv_find.
- Does not check if attribute is defined for the receiving object.
- "-Wxview" does not complain about structure arguments.
- "-Wxview-type" should distinguish between more types.
- "-Wxview" complains about attribute variables.
- XView extensions may cause more spurious warnings.

INSTALLATION:

Get gcc-2.0 from your favorite source of free software.

Get /pub/gcc-2.0-xview-0.0.tar.Z by anonymous ftp 
from hugin.dk (129.142.51.10).

Replace the "c-decl.c" and "c-typeck.c" files in gcc source directory,
and place the xview directory also in the gcc source directory.

Compile and install the new version of gcc using the normal procedure. 

Hint: 
    If you want to keep both the official and the XView version of
    gcc, then create a $gnulib/gcc/$ARCH/xview, and keep the official
    version in $gnulib/gcc/$ARCH/2.0.  Make symbolic links from everything
    in $gnulib/gcc/$ARCH/2.0 to $gnulib/gcc/$ARCH/xview, except cc1.  cc1
    is the only program affected by the changes.
    
    You will now be able to invoke the official version with "gcc" and the
    XView version with "gcc -V xview".

LEGAL NOTICE:

Everything in the XView directory is owned by SMI, the changes to the
"c-decl.c" are owned by me, and the changes to "c-typeck.c" are owned
by me and possibly by SMI.  Read the file xview/LEGAL_NOTICE for SMI's
position.  I would be happy to transfer ownership to the FSF.

Written by Per Abrahamsen (abraham@hugin.dk).