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This document describes the installation of version 2.0alpha11 of the Inter-Language Unification (ILU) system.
If you succeed in installing ILU on a particular platform,
we'd appreciate it if you could send a note to ilu-core@parc.xerox.com
telling us (1) what operating system you succeeded with, and what version
of that OS, (2) which versions of what compilers you used, and (3) which
version of ILU you used. We're accumulating
a list of operating systems and compilers that work with ILU. If you
had to make any changes to make it work on your system, please send them
along, and we'll incorporate them into the next release.
You will need an ANSI C compiler to build and install
ILU, along with an ANSI C-compliant `libc.a'.
Note that GNU gcc doesn't always work as an ANSI C compiler.
The simple test we use to qualify a compiler is whether it can compile and link
the following program without warnings or errors:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
int main(int ac, char **av) {
int i = INT_MAX;
char *p = (char *) malloc(1048);
memmove(p, *av, strlen(*av)+1);
printf("%s %d\n", p, i);
return 0;
}
ILU requires the imake program from the MIT X Consortium release
of the X Window System, version 4 or later. This is available via FTP
from the ftp servers ftp.x.org on the East Coast, or gatekeeper.dec.com
on the West Coast. You can also get it from
ftp://ftp.parc.xerox.com/pub/ilu/imake/imake.tar.gz.
ILU normally provides support for a number of languages, currently ANSI C, C++, Java, Python, and Common Lisp (Franz Allegro 4.3, and Harlequin LispWorks), but the 2.0alpha release only contains solid support for ANSI C, Java, and Python. C++ support (sans nested modules and any/pickles) that complies with the CORBA 2.0 spec is available for Visual C++ users - it has received very limited testing . The old, flakey minimal C++ support is still provided. There is reasonable support for Common Lisp in 2.0alpha10. There is rough support for Guile Scheme, contributed by Siemens Corporate Research, Inc.
g++ seems
to work well with ILU. It has also been tested with Lucid's Energize lcc compiler,
CenterLine's CC compiler, and Sun's CC compiler.
guile -c '(use-module '(ice-9 slib))' to see
if yours is configured properly.
Begin by creating two directories: one, ILUHOME, to install the ILU in, and the other, ILUSRC, to unpack the sources in, and build the system in. It is often convenient if ILUSRC is a sub-directory of ILUHOME, but it is not necessary. At PARC, we use `/import/ilu' for ILUHOME, and `/import/ilu/src' for ILUSRC.
Copy the compressed tar file `ilu-2.0alpha11.tar.Z' or `ilu-2.0alpha11.tar.gz' to
ILUSRC. Uncompress it if necessary with
the uncompress or gunzip program:
% uncompress ilu-2.0alpha11.tar.Z
or
% gunzip ilu-2.0alpha11.tar.gz
Then unpack the tar file:
% tar xf ilu-2.0alpha11.tar
We suggest you then look at the ILU home page, ftp://ftp.parc.xerox.com/pub/ilu/ilu.html, to see whether a patch file for release 2.0alpha11 exists. If so, fetch that patch file and apply it according to the instructions at the top of the file. It's best to fetch the patch file using FTP instead of the Web; the additional line-ending transformations that Web browsers (particularly Netscape) apply can render the patches in the file worthless.
You can try just unpacking it, and then typing
% make
at the top of the source tree. A minimal configuration using defaults will be built, sufficient for testing. This takes you up through step 2 of the "Building" section below.
ILU uses the GNU autoconf system to configure the release, before building. The very simplest way to configure your system is type type
% ./configure
at the top of the source tree.
What will happen is that ILUSRC/imake/configure will go out and look along
the value of your PATH environment variable for various executable
programs. If it finds cc, it will assume that you want to build
ANSI C support for ILU. If it finds java, it will assume
that you want to build Java support for ILU. If it
finds cl or franz, it will assume that you want to build
Lisp support for ILU. If it finds python, it will
assume that you want to build Python support for
ILU. If it finds CC or cxx or c++, it will assume that you want to build
C++ support for ILU. It will also assume that the
first executable with an appropriate name is the one you wish to use for
compiling programs in that language. By default, it will assume that you
wish to include support only for using ONC RPC over TCP/IP.
By default, it will assume that you do not wish to provide support for OMG IDL.
imake must be on your path, or in `/usr/bin/X11/', for the build to work properly.
The program configure can be invoked with a number of command line options, to customize
the build for your site. It actually supports more options than shown here, but these
are the only options that will work at this point in the release process.
--with-destdir=PATH -- this should be the name of the directory you would like
the files installed into, in the make Install step. The default
is `/usr/local/ilu', which may be OK for your system.
--with-iluhome=PATH -- this should be the name of the directory
users will expect ILU to be installed under, the value of ILUHOME. The two options
--with-destdir and --with-iluhome are provided separately because a directory may have
two different names that are used to access it in different ways. At PARC, for instance,
installation directories are often write-protected if named with their ordinary names,
and a special name has to be given to enable writing in that directory. If your site
does not have this type of restriction, the switches for --with-destdir and --with-iluhome
should probably have the same values. Note that the default is `/usr/local/ilu', which
may be OK for your system.
--prefix=PATH -- if specified, this becomes the default for ILUHOME and DESTDIR,
if they are not specified explicitly.
--with-binding-dir=PATH -- a world-writable directory in a shared file system,
for supporting the "simple binding" service described in Chapter 1. This option and the use
of a binding service (see next item) are mutually exclusive.
--with-binding-server=REALM:HOST:PORT -- an alternative to using the shared file system for simple
binding, this says that a binding registration server for the binding realm called REALM will be available
on port PORT of host HOST. The binding server will be built and installed as part of
the build process, but still has to be started manually. This option and the use of a binding directory are mutually exclusive.
--enable-debugging -- compiles in debugging printfs and a small amount of additional
debugging code. Recommend enable. Enabled by default.
--enable-os-threads[=TYPE] -- compiles in support for using either "solaris2" or "posix" threads with the C support. If the TYPE isn't specified, it will attempt to guess the right default. The default is to enable thread support for platforms where the configure script knows thread support exists (currently only Solaris 2 (Solaris 2 threads) and OSF 1.3 (POSIX threads). See the following section on "Manual Fixups for Threading", as well.
--enable-sunrpc-protocol -- compiles in support for using ONC RPC across address spaces. (Enabled by default.)
--enable-courier-protocol -- compiles in support for using XNS Courier RPC across address spaces. (Disabled by default)
--disable-corba-iiop -- prevents inclusion of support for using the CORBA Internet Inter-Orb Protocol across address spaces. (Enabled by default)
--enable-http-protocol -- compiles in support for using the World Wide Web HTTP 1.0 between address spaces. (Disabled by default)
--enable-tcp-transport -- compiles in support for using TCP/IP to transport messages. (Enabled by default.)
--disable-omg-idl-support -- excludes support for parsing interface description files written in OMG IDL. (Enabled by default.)
--enable-idl2isl-support -- builds old ILU OMG IDL support program called idl2isl. You will need to have a C++ compiler (CFRONT 3.0 or later) on your path. g++ seems to work fine. You will need to have fetched the source tar file from `ftp://ftp.parc.xerox.com/pub/ilu/misc/idl2isl.tar.gz', and to have unpacked it in the ILUSRC directory, before configuring. (Disabled by default.)
--enable-xview-support -- builds the libraries to interface the XView GUI library to the ILU main loop. (Disabled by default)
--enable-xt-support -- builds the libraries to interface Xt-based GUI libraries to the ILU main loop. (Disabled by default)
--enable-tk-support -- builds the libraries to interface Tk-based GUI libraries to the ILU main loop. (Disabled by default)
--disable-pickle-support -- prevents including support for a dynamically typed data type, called pickle in ILU and anyTypeCode support. (Enabled by default)
--disable-c-support -- disables C support. (Enabled by default.)
--enable-old-cplusplus-support{=PROG} -- enables old original ILU-style C++ support. This support is not compatible with the CORBA 2.0 style of mapping for C++. If PROG is specified, treats PROG as the command to use for C++ compilation; PROG must be the full path name. Default is to enable
C++ support iff the environment variable CXX is defined,
in which case CXX should be the full path name of the compilation command.
--enable-python-support{=PYTHON-HOME} -- enables Python support. If PYTHON-HOME is specified, treats PYTHON-HOME as the directory in which the Python system is installed. Default is enabled.
--enable-guile-support -- enables Guile Scheme support. Default is disabled.
--enable-old-python-gc-behavior -- Prevents Python true objects from being garbage collected by the Python runtime, even if there are no Python references to the object. This was the default in versions of ILU previous to 2.0alpha10. Default is now to not enable this.
--enable-java-support -- enables Java support. Default is enabled.
Features that are enabled by --enable-FEATURE may also be explicitly disabled with --disable-FEATURE.
The particular ANSI C compiler to use may be specified by setting the environment variable CC to the full path name of the C compilation command before running configure. Similarly, the particular C++ compiler to use may be specified by setting the environment variable CXX to the full path name of the C++ compilation command to use.
Sadly, our autoconf stuff is not yet fully up to the task of configuring for use of POSIX or Solaris 2 (SunOS 5) threads; you generally have to do a manual step or two, before and/or after running configure.
On some operating systems, linking POSIX threads programs requires a special flag, -lpthread, to appear at the end of the linkage command line. On others, the special flag is -lthreads or -lpthreads. The ILU autoconf system defaults to using -lpthread. You should find out out what the appropriate library for your system is, then, if you've configured with --enable-os-threads, edit `ILUSRC/imake/ilu.defs.new' after running configure but before running make. You should find a definition of the make variable SYSAUX_LIBRARIES that ends with -lpthread; change it to end with -lthreads instead.
On Solaris 2 (SunOS 5), when using the SunPro C and C++ compilers, one of three C preprocessor symbols must be #defined when compiling sources to be included in threaded programs; it's OK to #define these symbols for single-threaded programs too. Of the three, we prefer _REENTRANT because it has no other implications. When configuring to include OS-supplied thread support on Solaris 2, make sure you also explicitly supply a C compilation command, and that it includes -D_REENTRANT to #define this symbol.
On Linux, when using Provenzano's pthreads (POSIX threads) library, you use special scripts provided instead of gcc and g++. Those scripts are normally located at `/usr/local/pthreads/bin/pgcc' and `/usr/local/pthreads/bin/pg++'. Use the facilities described above to configure these scripts as your C and C++ (if you're doing C++) compilers. It's OK to compile even single-threaded programs this way. On our Linux systems, these scripts produce the following warning messages when linking executables:
bfd assertion fail /opt/release/pub/bin/binutils/bfd/elf32-i386.c:624 bfd assertion fail /opt/release/pub/bin/binutils/bfd/elfcode.h:4716
Despite the dire-sounding warnings, the linker seems to produce working executables. Provenzano knows about this, but hasn't tracked it down yet. Sadly, the warning messages trick our autoconf script into thinking this compilation failed, and thus that the requested compilers aren't ANSI-C compliant. To cope with this, we configure to compile with scripts that call the Provenzano scripts and filter out these messages; here's the one for C:
#!/bin/sh -f /usr/local/pthreads/bin/pgcc $* 2>/tmp/$$-cctmp ccstatus=$? fgrep -v "bfd assertion fail /opt/release/pub/bin/binutils/bfd/elf32-i386.c:624" </tmp/$$-cctmp | fgrep -v "bfd assertion fail /opt/release/pub/bin/binutils/bfd/elfcode.h:4716" >&2 rm -f /tmp/$$-cctmp exit $ccstatus
Now that you have configured the release, do the following to build the system. Note
that the capitalization of the arguments to make is important.
% cd ILUSRC
% make
% cd ILUSRC/examples/test1 % make test ../../stubbers/c/c-stubber Test1.isl header file for interface Test1 to ./Test1.h... common code for interface Test1 to ./Test1-common.c... code for surrogate stubs of interface Test1 to ./Test1-surrogate.c... code for true stubs of interface Test1 to ./Test1-true.c... ../../stubbers/c/c-stubber Test2.isl header file for interface Test2 to ./Test2.h... common code for interface Test2 to ./Test2-common.c... code for surrogate stubs of interface Test2 to ./Test2-surrogate.c... code for true stubs of interface Test2 to ./Test2-true.c... ../../stubbers/c/c-stubber Test3.isl header file for interface Test3 to ./Test3.h... common code for interface Test3 to ./Test3-common.c... code for surrogate stubs of interface Test3 to ./Test3-surrogate.c... code for true stubs of interface Test3 to ./Test3-true.c... rm -f clnt.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel clnt.c rm -f Test1-surrogate.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test1-surrogate.c rm -f Test1-common.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test1-common.c rm -f Test2-surrogate.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test2-surrogate.c rm -f Test2-common.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test2-common.c rm -f Test3-surrogate.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test3-surrogate.c rm -f Test3-common.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test3-common.c rm -f client cc -g -I. -o client clnt.o Test1-surrogate.o Test1-common.o \ Test2-surrogate.o Test2-common.o Test3-surrogate.o Test3-common.o \ ../../runtime/c/libilu-c.a ../../runtime/kernel/libilu.a rm -f srvr.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel srvr.c rm -f Test1-true.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test1-true.c rm -f Test3-true.o cc -c -g -I. -I../../runtime/c -I../../runtime/kernel Test3-true.c rm -f server cc -g -I. -o server srvr.o Test1-common.o Test1-true.o \ Test2-common.o Test3-common.o Test3-true.o \ ../../runtime/c/libilu-c.a ../../runtime/kernel/libilu.a ./testserver Starting server... Running client against server... Client run successful. Killing server... ./testserver: 27469 Terminated Exiting with status 0. %
% cd ILUSRC % make Install
% make CleanYou may wish to use
make Clean at any time, to get your
system into a consistent state.
make Clean', and redo the installation starting at step 2. If you run
into problems that can be fixed without changing the configuration files, you can re-build
the system by starting at step 3.
ILU tools use a number of UNIX environment variables under the covers. Note three distinct phases when these variables might have significance: (1) when building and installing ILU, (2) when developing an ILU application, and (3) when running an ILU applicaiton.
ILUHOME should be set to point to the value of ILUHOME. When does this matter??
ILUPATH is significant to the stubbers and other interface-processing tools, normally used in phase (2). If this variable is defined, it is a colon-separated list of directories that are searched, in addition to those specified on the relevant tool's command line, for interface files. If this variable is not defined, the value `.:ILUHOME/interfaces' is used.
PATH
environment variable to include the directory `ILUHOME/bin' during phase (2). This makes it possible to invoke ILU development tools (e.g., stubbers, TIM tools) by short names. Most of the ILU development tools can be invoked by their full pathnames, without `ILUHOME/bin' being on your PATH; some of the TIM tools require `ILUHOME/bin' to be on your PATH.
MANPATH variable can have the directory `ILUHOME/man' on it.
SYSDCLPATH to find system descriptions. It should
be a colon-separated list of directories. A good initial value might be
.:${ILUHOME}/lisp. See Appendix A of the reference manual for more details on the portable
DEFSYSTEM.
PYTHONPATH
should include the directory in which the ilu library for
Python has been installed;
that's normally `ILUHOME/lib'.
java
interpreter is on your PATH, and that `ILUHOME/bin' is on
your PATH. The value of the environment variable CLASSPATH should
have `ILUHOME/lib/ilu.jar' on it, or if on Windows,
`ILUHOME/lib/javaclasses' on it. The value of the environment
variable LD_LIBRARY_PATH should have `ILUHOME/lib' on it.
LD_LIBRARY_PATH
should include the directory in which the ilu library for Guile has been installed;
that's normally `ILUHOME/lib'. Additionally, the environment variable SCHEME_LOAD_PATH
should contain `ILUHOME/guile', so that the ILU Guile files can be found.
ISLDEBUG can optionally be set to any value to enable tracing
in the ISL parser.
ILU_DEBUG can be optionally be set to a colon-separated list of
trace values to enable tracing in the ILU runtime kernel. See section Debugging ILU Programs, for more information.
ILU_BINDING_DIRECTORY
to the path of a different directory.
ILU_BINDING_SERVICE to a string of the form "realm-name:host:port". Any of the three fields may be empty, so you could override just the port, for example, by using a value of the form "::2034", which would mean to use the default values for REALM-NAME and HOST, and the value of 2034 for the port.
There are several ways to test the build. The most straightforward is to build and install it somewhere. Set up your environment variables as described above. Then make a scratch directory, which we'll refer to as TESTDIR, and do the following:
% cd TESTDIR
% cp ILUHOME/examples/test1/* .
% ilumkmf
% make client server
ILUHOME/bin/c-stubber Test1.isl
header file for interface Test1 to ./Test1.h...
common code for interface Test1 to ./Test1-common.c...
code for surrogate stubs of interface Test1 to ./Test1-surrogate.c...
code for true stubs of interface Test1 to ./Test1-true.c...
ILUHOME/bin/c-stubber Test2.isl
header file for interface Test2 to ./Test2.h...
common code for interface Test2 to ./Test2-common.c...
code for surrogate stubs of interface Test2 to ./Test2-surrogate.c...
code for true stubs of interface Test2 to ./Test2-true.c...
ILUHOME/bin/c-stubber Test3.isl
header file for interface Test3 to ./Test3.h...
common code for interface Test3 to ./Test3-common.c...
code for surrogate stubs of interface Test3 to ./Test3-surrogate.c...
code for true stubs of interface Test3 to ./Test3-true.c...
rm -f clnt.o
cc -c -g -I. -IILUHOME/include clnt.c
rm -f Test1-surrogate.o
cc -c -g -I. -IILUHOME/include Test1-surrogate.c
rm -f Test1-common.o
cc -c -g -I. -IILUHOME/include Test1-common.c
rm -f Test2-surrogate.o
cc -c -g -I. -IILUHOME/include Test2-surrogate.c
rm -f Test2-common.o
cc -c -g -I. -IILUHOME/include Test2-common.c
rm -f Test3-surrogate.o
cc -c -g -I. -IILUHOME/include Test3-surrogate.c
rm -f Test3-common.o
cc -c -g -I. -IILUHOME/include Test3-common.c
rm -f client
cc -g -o client clnt.o Test1-surrogate.o Test1-common.o \
Test2-surrogate.o Test2-common.o Test3-surrogate.o \
Test3-common.o ILUHOME/lib/libilu-c.a \
ILUHOME/lib/libilu.a
rm -f srvr.o
cc -c -g -I. -IILUHOME/include srvr.c
rm -f Test1-true.o
cc -c -g -I. -IILUHOME/include Test1-true.c
rm -f Test3-true.o
cc -c -g -I. -IILUHOME/include Test3-true.c
rm -f server
cc -g -o server srvr.o Test1-common.o Test1-true.o \
Test2-common.o Test3-common.o Test3-true.o \
ILUHOME/lib/libilu-c.a ILUHOME/lib/libilu.a
% ./server &
[1] 7079
% exported ilu:Test1-Server/Test1_Initial_Object;ilu%3AiX2w6hjR-...
% ./client
Test1.O1.U-CSS-to-U
u._d=5, u._u.boolean = 1, u._u.O1 = 0x1ffee7c
Test1.O1.f-CSS-to-R0
ro->i=9
Test1.O1.R-ScS-to-F
f=39.700001
Test1.O1.a-RO
Test1.O1.get-O2
got O2, sbh = ilu:Test1-SunRPC-Server/1;ilu%3AaUtts57Ywbp2fxe6+-...
Test1.o2.OO-A0-to-CSS
Test1.O2.R-I-A1-to-I-A0
Test1.O1.get-O3
making O3...
got O3, sbh = ilu:Test1-Server/2;ilu%3An+eRrvAZ8JB9v2qoX7sJGPxdX...
Test1.O3.RS-R-to-R-IS
Test1.O3.O1-U-to-U
u._d=3, u._u.boolean = 0, u._u.O1 = 0xd2b78
Test1.O1.get-O3
got O3, sbh = ilu:Test1-Server/3;ilu%3Ab-mNa9uj0TsJAp7YrlEh0AUfX...
Test3.O.RS-R-to-R-IS
Test3.O.O1-U-to-U(0xd7520, {3})
u._d=3, u._u.boolean = 0, u._u.O1 = 0xd2b78
Test3.O.I-to-Test1U(397)
Test3_O_I_to_Test1U: u2._d=5, u2._u.boolean = 1, u2._u.O1 = 0x10a88d0
Test1.O1.get-O3
making O4...
got O3, sbh = ilu:Test1-Server/4;ilu%3Ad8sZGQLLpVsJ2PBL5BoIX45qO...
Test1.O4.R_to_R (12345.6789000000) => 1020304.0506070800
doubles: r1 is 12345.6789000000, r2 is 1020304.0506070800
%
You can proceed to test the various other clients and servers in different languages against each other. See the file `ILUHOME/examples/test1/README' for more information.
From hassan@db.stanford.edu: "In order to get ILU 2.0a to compile on HP/UX, I had to set the CC
environment variable to the following before running configure: setenv CC "/bin/cc -Aa +z -D_HPUX_SOURCE"."
From hassan@db.stanford.edu: "Use cc instead of gcc as the C compiler,
and make sure to include the `-taso' switch."
From jg@w3.org: "I built [ILU 2.0 alpha on OSF 3.2B] without the `-taso' switch.
Is this still needed? c-stubber certainly ran without it this release."
Note that the default Sun C compiler is not ANSI C, nor is gcc when
installed against the normal Sun header files and `/lib/libc.a'. You will have to use either
gcc with the GNU C Library glibc, or the SunPro ANSI C compiler acc, or Lucid Energize lcc, or some other ANSI compiler.
The following example uses of ILU are provided in the installed tree as subdirectories of `ILUHOME/examples/':
Read the `README' file in each directory first.
No standard "name service" or binding service is provided. We feel that this is an area
to be addressed independently, and we may include a name service in future releases of ILU.
An experimental simple name service bootstrap interface is available as the simple binding system.
See the ANSI C ILU_C_PublishObject, ILU_C_WithdrawObject, and ILU_C_LookupObject,
and corresponding routines in the other languages, for more details. This interface is intended to
be only sufficient to find the real name service.
Two implementations of this are available, one using an ILU service to store the information, the other using a shared filesystem. They can be selected at configuration time, by specifying either "--with-binding-dir=DIRECTORYNAME", or "--with-binding-service=REALM:HOST:PORT", where REALM may be a user-specified string identifier, that is the name of some conceptual space which the simple binding server serves. These values are compiled into the ILU kernel library, but may be overridden with environment variables at runtime.
ILU documentation is provided in a pre-formatted form, PostScript. The source form
of the documentation is called TIM, and is documented in the ILU reference manual.
If for some reason you do need to rebuild the documentation, you should have the systems TeX, Perl, ghostscript, dvips,
and pbmplus; if you can't find these yourself,
please send mail to ilu-core@parc.xerox.com for info on how to find them.
To be added to, or deleted from, any ILU mailing list, please send mail to ilu-request@parc.xerox.com. Do not send mail to the list itself.
The general ILU discussion mailing list is ilu@parc.xerox.com. People post questions, discuss changes, and help each other out on that list. Another list, used only for announcements of ILU things, and consequently much lower-volume, is ilu-interest@parc.xerox.com. The ilu list receives everything that the ilu-interest list receives; there is no need to be on both lists. Again, send mail to ilu-request@parc.xerox.com to be added to or removed from either of these lists.
Archives of these lists can be found at http://www.findmail.com/listsaver/ilu/?archive/.
HTTP support will now properly redirect for responses.
It also responds to non-1.0 versions of the HTTP protocol more
kindly, and has the beginnings of support for HTTP 1.1.
IIOP is available as "siiop";
note that since the OMG spec clearly identifies IIOP as
concurrent (in the ILU sense), "siiop" should only
be used between ILU clients and servers.
"w3mux", allows for multiple simultaneous sessions
or connections over a single TCP/IP connection. It supports message fragmentation
and interleaving of streams. It supports bi-directional connections over
the TCP/IP connection, thereby supporting callbacks through firewalls.
portmapper is now included,
in `ILUSRC/etc/portmapper/'. Included is an ILU ISL
description of the portmapper interface, which can be used directly with other
languages.
import
mechanism in Python can now be augmented by calling the function ilu.AutoImport()import so that, when
attempting to import a module called foo, if it fails to find `foo.py'
and `foo.pyc' on the PYTHONPATH environment variable, it will then
walk down the directories listed in the ILUPATH environment variable, looking
for either `foo.isl', or, if OMG IDL support is enabled, `foo.idl'.
If either of these are found, it will run the Python stubber on the file,
putting the results in a temporary directory, and then load the resulting surrogate-side
`foo.py' file.
ILU_C_Object *) are now reference counted. An application must be careful
to use CORBA_Object_duplicate and CORBA_Object_release correctly to
avoid memory smashes.
--enable-pickle-support and --enable-corba-iiop have been selected,
full type information on all compiled-in or dynamically-loaded ISL
types is now cached in memory. This makes it theoretically possible for someone
to write a CORBA Interface Repository service for ILU (or something
more useful). Note changes in ilu_DefineMethod, ilu_DefineException,
and the new function ilu_DefineMethodArg.
HTTP protocol may now
be selected with the string "http_1_0p", which causes it to send
Connection: "Keep-Alive" headers, and not close the connection between calls
(assuming of course that the other end of the connection also supports this
behavior - fairly common.) The programs in examples/httest have been updated
accordingly. In addition, it is now possible to use HTTP over
a boundaried transport.
idl2isl
compiler now, for an OMG IDL exception E, generates an
ISL exception called E, and an ISL type called
ilu--prefix-idlExceptionType-E. The stubbers handle this type variously;
the C stubber renames it to E, as required by the CORBA
spec; the Python stubber renames it to E__omgidl_exctype;
the Lisp stubber folds it into the definition of the condition
E, and doesn't support the type directly at all.
iluMainLoop class in the old
C++ runtime.
Sun RPC can be created.
idl2isl
is now part of the Windows build.
PICKLE, to pass arbitrary typed values across interfaces. Pickle support is implemented in such a fashion as to be interoperable with CORBA any, and our OMG IDL to ISL translator in fact maps any directly to PICKLE.
HTTP, version 1.0, between address spaces. This makes ILU programs Web servers and clients, though only in a very limited sense. See the `Protocols and Transports' chapter of the user manual for more information.
ilusbls. A program, ilusbls, that will list the objects known to the simple binding service, is provided. ilusbls will work with either the shared files simple binding or the ILU service simple binding.
ilu_IdentityInfo.
--enable-os-threads, and your Python installation has been built with thread support, thread support will also be available in the Python ILU runtime. A new Python function, ilu.ThreadedOperation(), has been added to enable use of threads.
This release contains some major changes, and is NOT compatible "on the wire" with any previous version of ILU. There are also a few API changes. There may be further changes in 2.0beta and 2.0.
8) Generalized cleanup and bug fixing. This includes more attention to making it practical for others to add transport and protocol meta-objects. This also includes a more rigorous treatment of exceptions in the kernel and runtimes, with a taxonomy of exceptions aligned with CORBA's. It also includes fixes that change the type ID's and protocol mappings, which caused us to bump the major version number. All ONC RPC and Courier program numbers, and ISO object IDs are now official. The Courier type-ID-to-program-number mapping registry has been eliminated.
This means that if you wish to use ILU 1.6.4 clients or servers with ILU 1.7, you should edit the 1.6.4 SunRPCRegistry file to use the 1.7 program number and version for each particular object type.
This also means that the ILU on-the-wire mapping for objects has been changed (slightly) to allow for NIL object references. Applications that do not use NIL objects will not encounter this change.
KNOWN BUGS:
Release 2.0alpha10:
Release 2.0alpha9:
Report bugs (nah! -- couldn't be!) to the Internet address ilu-bugs.parc@xerox.com,
or to the XNS address ILU-bugs:PARC:Xerox. Bug reports are more helpful with
some information about the activity; please read section Debugging ILU Programs,
for more information on how to look at problems. General comments and suggestions can
be sent to either ILU@parc.xerox.com or ILU-bugs.
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