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BuildingCmucl · Changes

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Convert trac to gitlab authored Sep 20, 2015 by Raymond Toy's avatar Raymond Toy
Trac database from 2015-09-20 converted to markdown via trac2down.py.
See the clo-devel mailing list, Sep 1, 2015 from Philippe Brochard.
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<!-- Name: BuildingCmucl -->
<!-- Version: 8 -->
<!-- Last-Modified: 2014/10/12 09:28:48 -->
<!-- Author: rtoy -->
# Building CMU CL
<!-- [[PageOutline]] -->
This document is intended to give you a general overview of the build
process (i.e. what needs to be done, in what order, and what is it
generally called). It will also tell you how to set up a suitable
build environment, how the individual scripts fit into the general
scheme of things, and give you a couple of examples.
## General Requirements
In order to build CMU CL, you will need:
```
#!html
<ol type="a">
<li> A working CMU CL binary.
<p>There is no way around this requirement!
This binary can either be for the platform you want to target, in
that case you can either recompile or cross-compile, or for another
supported platform, in that case you must cross-compile, obviously.</p>
</li>
<li> A supported C compiler for the C runtime code.
<p>Most of the time, this means GNU gcc, though for some ports it
means the vendor-supplied C compiler. The compiler must be
available under the name specified by your ports Config file.</p>
</li>
<li> GNU make.
<p>This has to be available either as gmake or make in your <code>PATH</code>, or
the <code>MAKE</code> environment variable has to be set to point to the correct
binary.</p>
</li>
<li> The CMU CL source code.
<p>Here you can either use one of the release source tarballs, or
check out the source code directly from the public CMUCL git
repository.</p>
</li>
</ol>
```
If you want to build CMU CL's Motif interface/toolkit, you'll need a
working version of the Motif libraries, either true-blue OSF/Motif, or
[OpenMotif](http://www.openmotif.org), or [LessTif](http://www.lestif.org). The code
was developed against 1.2 Motif, though recompilation against 2.x
Motif probably works as well.
## Setting up a build environment
```
#!html
<ol>
<li> Create a base directory and change to it
<pre>
</pre>
</li>
<li> Fetch the sources and put them into the base directory
<pre>
</pre> <p> or, if you want to use the git sources directly:</p>
<pre>
</pre> <p>Whatever you do, the sources must be in a directory named <code>src</code>
</li>
</ol>
```
That's it, you are now ready to build CMU CL.
## A quick guide for simple builds
We recommend that you read all of this document, but in case you don't
want to do that and in case you know, somehow, that the version of
CMUCL you are building from will build the sources you have, here is a
quick guide.
```
#!html
<ol type="a">
<li> Simple builds
<p> Use this to build from a version of CMUCL that is very close to the
sources you are trying to build now:</p>
<pre>
bin/build.sh -C "" -o "&lt;path-to-old-lisp&gt; &lt;options-to-lisp&gt;"
</pre>
<p>For example, let's say you want to use the 2012-05 snapshot that
you stored in the <code>$HOME/2012-05</code> directory. Then
<code>&lt;path-to-old-lisp&gt;</code> would be
<code>$HOME/2012-05/bin/lisp</code>. Usually, no options are
needed so <code>&lt;options-to-lisp&gt;<code> is not needed.</p>
<p>This will build CMUCL 3 times, each time with the result of the
previous build. The last time, the additional libraries like CLX,
CLM, and Hemlock are built. The final result will be in the
directory build-4.</p>
<p>This script basically runs create-target.sh, build-world.sh,
load-world.sh three times. See below for descriptions of these
scripts.</p>
</li>
<li> Slightly more complicated builds
<p>For slightly more complicated builds, you may need to use some
bootstrap files. See below for more information about these
bootstrap files. </p>
<p>For these, you can use this:</p>
<pre>
bin/build.sh -C "" -o "&lt;old-lisp&gt;" -B boot1.lisp -B boot2.lisp
</pre>
<p>The bootstrap files listed with the -B option (as many as needed)
are loaded in order, so be sure to get them right.</p>
<p>As in a) above, three builds are done, and the result is in the
directory build-4.</p>
</li>
<li> More complicated builds
<p>If you have more complicated builds, this script probably will not
work, and definitely does not handle cross-compiles. In this case,
you will have to invoke the individual scripts by hand, as
described below.</p>
</li>
</ol>
```
How do you know which of the three options above apply? The easiest
way is to look in `src/bootfiles/<version>/*` for boot files. If the
file date of a boot file is later than the version of CMUCL you are
building from, then you need to use b) or c) above. You may need to
read the bootfiles for additional instructions, if any.
If there are no bootfiles, then you can use a) above.
The `build.sh` script supports other options, and `bin/build.sh -?`
will give a quick summary. Read `bin/build.sh` for more
information.
## A general outline of the build process
Building CMU CL can happen in one of two ways: Normal recompilation,
and cross-compilation. We'll first look at normal recompilation:
The recompilation process basically consists of 4 phases/parts:
```
#!html
<ol type="a">
<li> Compiling the lisp files that make up the standard kernel.
<p>This happens in your current CMU CL process, using your current
CMU CL's normal file compiler. This phase currently consists of 3
sub-phases, namely those controlled by <code>src/tools/worldcom.lisp</code>,
which compiles all the runtime files, <code>src/tools/comcom.lisp</code>, which
compiles the compiler (including your chosen backend), and finally
src/tools/pclcom.lisp, which compiles PCL, CMU CL's CLOS
implementation. The whole phase is often called "world-compile",
or "compiling up a world", based on the name of the first
sub-phase.</p>
</li>
<li> Building a new kernel.core file out of the so created files
<p>This process, which is generally called genesis, and which is
controlled by <code>src/tools/worldbuild.lisp</code>, uses the newly compiled
files in order to build a new, basic core file, which is then used
by the last phase to create a fully functional normal core file.
It does this by "loading" the compiled files into an in-core
representation of a new core file, which is then dumped out to
disk, together with lots of fixups that need to happen once the new
core is started.</p>
<p>As part of this process, it also creates the file <code>internals.h</code>,
which contains information about the general memory layout of the
new core and its basic types, their type tags, and the location of
several important constants and other variables, that are needed by
the C runtime code to work with the given core.</p>
<p>So going through genesis is needed to create internals.h, which is
needed to compile the C runtime code (i.e. the "lisp" binary).
However there is a slight circularity here, since genesis needs as
one of its inputs the file target:lisp/lisp.nm, which contains the
(slightly pre-treated) output of running nm on the new lisp
binary. Genesis uses this information to fixup the addresses of C
runtime support functions for calls from Lisp code.</p>
<p>However the circularity isn't complete, since genesis can work with
an empty/bogus lisp.nm file. While the kernel.core it then
produces is unusable, it will create a usable internals.h file,
which can be used to recompile the C runtime code, producing a
usable lisp.nm file, which in turn can be used to restart genesis,
producing a working kernel.core file.</p>
<p>Genesis also checks whether the newly produced internals.h file
differs from a pre-existing internals.h file (this might be caused
by an empty internals.h file if you are rebuilding for the first
time, or by changes in the lisp sources that cause differences in
the memory layout of the kernel.core), and informs you of this, so
that you can recompile the C runtime code, and restart genesis.</p>
<p>If it doesn't inform you of this, you can skip directly to the last
phase d).</p>
</li>
<li> Recompiling the C runtime code, producing the "lisp" binary file
<p>This step is only needed if you haven't yet got a suitable lisp
binary, or if the internals.h file has changed during genesis (of
which genesis informs you), or when you made changes to the C
sources that you want to take effect.</p>
<p>Recompiling the C runtime code is controlled by a GNU Makefile, and
your target's Config file. It depends on a correct internals.h
file as produced by genesis.</p>
<p>Note that whenever you recompile the runtime code, for whatever
reason, you must redo phase b). Note that if you make changes to
the C sources and recompile because of this, you can do that before
Phase b), so that you don't have to perform that phase twice.</p>
</li>
<li> Populating the kernel.core, and dumping a new lisp.core file.
<p>In this phase, which is controlled by src/tools/worldload.lisp, and
hence often called world-load, the kernel.core file is started up
using the (possibly new) lisp binary, the remaining files which
were compiled in phase a) are loaded into it, and a new lisp.core
file is dumped out.</p>
</li>
</ol>
```
We're not quite done yet. This produces just a basic lisp.core.
To complete the build so that you something similar to what the
releases of CMUCL do, there are a few more steps:
```
#!html
<ol type="a">
<li> Build the utilities like Gray streams, simple streams, CLX, CLM,
and Hemlock. Use the bin/build-utils.sh script for this, as
described below
</li>
<li> Create tarfiles using the bin/make-dist.sh script, as
explained below.
</li>
</ol>
```
With these tarfiles, you can install them anywhere. The contents of
the tarfiles will be the same as the snapshots and releases of CMUCL.
When cross-compiling, there is additional phase at the beginning, and
some of the phases happen with different hosts/platforms. The initial
phase is setting up and compiling the cross-compilation backend, using
your current compiler. The new backend is then loaded, and all
compilation in phase a) happens using this compiler backend. The
creation of the kernel.core file in phase b) happens as usual, while
phase c) of course happens on the target platform (if that differs
from the host platform), as does the final phase d). Another major
difference is that you can't compile PCL using the cross-compiler, so
one usually does a normal rebuild using the cross-compiled core on the
target platform to get a full CMU CL core.
So, now you know all about CMU CL compilation, how does that map onto
the scripts included with this little text?
## Overview of the included build scripts
`bin/build.sh [-123obvuBCU?]`::
This is the main build script. It essentially calls the other build
scripts described below in the proper sequence to build cmucl from an
existing binary of cmucl.
`bin/create-target.sh target-directory [lisp-variant [motif-variant]]`::
This script creates a new target directory, which is a shadow of the
source directory, that will contain all the files that are created by
the build process. Thus, each target's files are completely separate
from the src directory, which could, in fact, be read-only. Hence you
can simultaneously build CMUCL for different targets from the same
source directory.
The first argument is the name of the target directory to create. The
remaining arguments are optional. If they are not given, the script
tries to determine the lisp variant and motif variant from the system
the script is running on.
The lisp-variant (i.e. the suffix of the src/lisp/Config.* to use as
the target's Config file), and optionally the motif-variant (again the
suffix of the src/motif/server/Config.* file to use as the Config file
for the target's CMUCL/Motif server code). If the lisp-variant is
given but the motif-variant is not, the motif-variant is determined
from the lisp-variant.
The script will generate the target directory tree, link the relevant
Config files, and generate place-holder files for various files, in
order to ensure proper operation of the other build-scripts. It also
creates a sample setenv.lisp file in the target directory, which is
used by the build and load processes to set up the correct list of
*features* for your target lisp core.
IMPORTANT: You will normally NOT have to modify the sample setenv.lisp
file, if you are building from a binary that has the desired features.
In fact, the sample has all code commented out, If you want to add or
remove features, you need to include code that puts at least a minimal
set of features onto the list (use PUSHNEW and/or REMOVE). You can
use the current set of *features* of your lisp as a first guide. The
sample setenv.lisp includes a set of features that should work for the
intended configuration. Note also that some adding or removing some
features may require a cross-compile instead of a normal compile.
`bin/clean-target.sh [-l] target-directory [more dirs]`::
Cleans the given target directory, so that all created files will be
removed. This is useful to force recompilation. If the -l flag is
given, then the C runtime is also removed, including all the lisp
executable, any lisp cores, all object files, lisp.nm, internals.h,
and the config file.
`bin/build-world.sh target-directory [build-binary] [build-flags...]`::
Starts a complete world build for the given target, using the lisp
binary/core specified as a build host. The recompilation step will
only recompile changed files, or files for which the fasl files are
missing. It will also not recompile the C runtime code (the lisp
binary). If a (re)compilation of that code is needed, the genesis
step of the world build will inform you of that fact. In that case,
you'll have to use the rebuild-lisp.sh script, and then restart the
world build process with build-world.sh
`bin/rebuild-lisp.sh target-directory`::
This script will force a complete recompilation of the C runtime code
of CMU CL (aka the lisp executable). Doing this will necessitate
building a new kernel.core file, using build-world.sh.
`bin/load-world.sh target-directory version`::
This will finish the CMU CL rebuilding process, by loading the
remaining compiled files generated in the world build process into the
kernel.core file, that also resulted from that process, creating the
final lisp.core file.
You have to pass the version string as a second argument. The dumped
core will anounce itself using that string. Please don't use a string
consisting of an official release name only, (e.g. "18d"), since those
are reserved for official release builds. Including the build-date in
ISO8601 format is often a good idea, e.g. "18d+ 2002-05-06" for a
binary that is based on sources current on the 6th May, 2002, which is
post the 18d release.
`bin/build-utils.sh target-directory`::
This script will build auxiliary libraries packaged with CMU CL,
including CLX, CMUCL/Motif, the Motif debugger, inspector, and control
panel, and the Hemlock editor. It will use the lisp executable and
core of the given target.
`bin/make-dist.sh [-bg] [-G group] [-O owner] target-directory version arch os`::
This script creates both main and extra distribution tarballs from the
given target directory, using the make-main-dist.sh and
make-extra-dist.sh scripts. The result will be two tar files. One
contains the main distribution including the runtime and lisp.core
with PCL (CLOS); the second contains the extra libraries such as
Gray-streams, simple-streams, CLX, CLM, and Hemlock.
Some options that are available:
-b Use bzip2 compression
-g Use gzip compression
-G group Group to use
-O owner Owner to use
If you specify both -b and -g, you will get two sets of tarfiles. The
-G and -O options will attempt to set the owner and group of the files
when building the tarfiles. This way, when you extract the tarfiles,
the owner and group will be set as specified. You may need to be root
to do this because many Unix systems don't normally let you change the
owner and group of a file.
The remaining arguments used to create the name of the tarfiles. The
names will have the form:
```
cmucl-<version>-<arch>-<os>.tar.bz2
cmucl-<version>-<arch>-<os>.extras.tar.bz2
```
Of course, the "bz2" will be "gz" if you specified gzip compression
instead of bzip.
/bin/make-main-dist.sh target-directory version arch os::
This is script is not normally invoked by the user; make-dist will do
it appropriately.
This script creates a main distribution tarball (both in gzipped and
bzipped variants) from the given target directory. This will include
all the stuff that is normally included in official release tarballs
such as lisp.core and the PCL libraries, including Gray streams and
simple streams.
This is intended to be run from `make-dist.sh`.
`bin/make-extra-dist.sh target-directory version arch os`::
This is script is not normally invoked by the user; make-dist will do
it appropriately.
This script creates an extra distribution tarball (both in gzipped and
bzipped variants) from the given target directory. This will include
all the stuff that is normally included in official extra release
tarballs, i.e. the auxiliary libraries such as CLX, CLM, and Hemlock.
`cross-build-world.sh target-directory cross-directory cross-script [build-binary] [build-flags...]`::
This is a script that can be used instead of build-world.sh for
cross-compiling CMUCL. In addition to the arguments of build-world.sh
it takes two further required arguments: The name of a directory that
will contain the cross-compiler backend (the directory is created if
it doesn't exist, and must not be the same as the target-directory),
and the name of a Lisp cross-compilation script, which is responsible
for setting up, compiling, and loading the cross-compiler backend.
The latter argument is needed because each host/target combination of
platform's needs slightly different code to produce a working
cross-compiler.
We include a number of working examples of cross-compiler scripts in
the cross-scripts directory. You'll have to edit the features section
of the given scripts, to specify the features that should be removed
from the current set of features in the host lisp, and those that
should be added, so that the backend features are correct for the
intended target.
You can look at Eric Marsden's collection of build scripts for the
basis of more cross-compiler scripts.
## Step-by-Step Example of recompiling CMUCL for OpenBSD
Set up everything as described in the setup section above. Then
execute:
```
# Create a new target directory structure/config for OpenBSD:
bin/create-target.sh openbsd OpenBSD_gencgc OpenBSD
# edit openbsd/setenv.lisp to contain what we want:
cat <<EOF > openbsd/setenv.lisp
;;; Put code to massage *features* list here...
(in-package :user)
(pushnew :openbsd *features*)
(pushnew :bsd *features*)
(pushnew :i486 *features*)
(pushnew :mp *features*)
(pushnew :hash-new *features*)
(pushnew :random-mt19937 *features*)
(pushnew :conservative-float-type *features*)
(pushnew :gencgc *features*)
;;; Version tags
(pushnew :cmu18d *features*)
(pushnew :cmu18 *features*)
(setf *features* (remove :cmu17 *features*))
(setf *features* (remove :cmu18c *features*))
EOF
# Recompile the lisp world, and dump a new kernel.core:
bin/build-world.sh openbsd lisp # Or whatever you need to invoke your
# If build-world tells you (as it will the first time) that:
# "The C header file has changed. Be sure to re-compile the startup
# code."
# You 'll need to start rebuild-lisp.sh to do that, and then reinvoke
# build-world.sh:
# Recompile lisp binary itself:
bin/rebuild-lisp.sh openbsd
# Restart build-world.sh now:
bin/build-world.sh openbsd lisp
# Now we populate the kernel.core with further compiled files,
# and dump the final lisp.core file:
bin/load-world.sh openbsd "18d+ 2002-05-06"
# The second argument above is the version number that the built
# core will announce. Please always put the build-date and some
# other information in there, to make it possible to differentiate
# those builds from official builds, which only contain the release.
```
Now you should have a new lisp.core, which you can start with
```
./openbsd/lisp/lisp -core ./openbsd/lisp/lisp.core -noinit -nositeinit
```
## Compiling sources that contain disruptive changes
The above instructions should always work as-is for recompiling CMU CL
using matching binaries and source files. They also work quite often
when recompiling newer sources. However, every so often, some change
to the CMU CL sources necessitates some form of bootstrapping, so that
binaries built from earlier sources can compile the sources containing
that change. There are two forms of boostrapping that can be
required:
```
#!html
<ol style="list-style-type:lower-alpha">
<li> Bootfiles
<p>The maintainers try to make bootfiles available, that allow going
from an old release to the next release. These are located in the
src/bootfiles/<old-release>/ directory of the CMU CL sources.</p>
<p>I.e. if you have binaries that match release 18d, then you'll need
to use all the bootfiles in src/bootfiles/18d/ in order to go to
the next release (or current sources, if no release has been made
yet). If you already used some of the bootstrap files to compile
your current lisp, you obviously don't need to use those to get to
later versions.</p>
<p>You can use the bootfiles by concatenating them into a file called
bootstrap.lisp in the target directory (i.e. target:bootstrap.lisp)
in the order they are numbered. Be sure to remove the bootstrap
file once it is no longer needed.</p>
<p>Alternatively, the bootstrap file can just "load" the individual
bootfiles as needed.</p>
</li>
<li> Cross-compiling
<p>Under some circumstances, bootstrap code will not be sufficient,
and a cross-compilation is needed. In that case you will have to
use cross-build-world.sh, instead of build-world.sh. Please read
the instructions of that script for details of the more complex
procedure.</p>
<p><< This isn't really true anymore, and we should place a more
<p>When cross-compiling, there are two sorts of bootscripts that can be
used: Those that want to be executed prior to compiling and loading
the cross-compiler, which should be placed in the file called
target:cross-bootstrap.lisp, and those that should happen after the
cross-compiler has been compiled and loaded, just prior to compiling
the target, which should be placed in target:bootstrap.lisp, just
like when doing a normal recompile.</p>
<p>Additionally, sometimes customized cross-compiler setup scripts
(to be used in place of e.g. cross-x86-x86.lisp) are required,
which are also placed in one of the bootfiles/*/* files. In those
cases follow the instructions provided in that file, possibly merging
the changed contents thereof with your normal cross-script.</p>
</li>
</ol>
```
## Step-by-Step Example of Cross-Compiling
This gives a step-by-step example of cross-compiling a sparc-v8 build
using a sparc-v9 build. (For some unknown reason, you can't just
remove the :sparc-v9 feature and add :sparc-v8.)
So, first get a recent sparc-v9 build. It's best to get a version
that is up-to-date with the sources. Otherwise, you may also need to
add a bootstrap file to get any bootfiles to make your lisp
up-to-date with the current sources.
```
#!html
<ol>
<li> Select a directory for the cross-compiler and compiled target:
<p>Create a cross-compiler directory to hold the cross-compiler
and a target directory to hold the result:</p>
<pre>
bin/create-target.sh xcross
bin/create-target.sh xtarget
</pre>
</li>
<li> Adjust cross-compilation script
<p>Copy the src/tools/cross-scripts/cross-sparc-sparc.lisp to
xtarget/cross.lisp. Edit it appropriately. In this case, it
should look something like:</p>
<pre>
(c::new-backend "SPARC"
;; Features to add here
'(:sparc :sparc-v8
:complex-fp-vops
:linkage-table
:gencgc
:stack-checking
:relative-package-names
:conservative-float-type
:hash-new :random-mt19937
:cmu :cmu19 :cmu19a
)
;; Features to remove from current *features* here
'(:sparc-v9 :sparc-v7 :x86 :x86-bootstrap :alpha :osf1 :mips
:propagate-fun-type :propagate-float-type :constrain-float-type
:openbsd :freebsd :glibc2 :linux :pentium
:long-float :new-random :small))
(setf *features* (remove :sparc-v9 *features*))
(pushnew :sparc-v8 *features*)
</pre>
It's important to add frob *features* here as well as in the
new-backend. If you don't adjust *features*, they won't be
set appropriately in the result.
</li>
<li> Build the cross compiler and target
<p>Now compile the result:</p>
<pre>
bin/cross-build-world.sh xtarget xcross xtarget/cross.lisp [v9 binary]
</pre>
<li> Rebuild the lisp files:
<p>When this finishes, you need to compile the C code:</p>
<pre>
bin/rebuild-lisp.sh xtarget
</pre>
<p>At this point, you may want to run cross-build-world.sh again
to generate a new kernel.core. It shouldn't build anything;
just loads everything and creates a kernel.core.</p>
<li> Build the world:
<p>With the new kernel.core, we need to create a lisp.core:</p>
<pre>
bin/load-world.sh xtarget "new lisp"
</pre>
<p>Test the result with</p>
<pre>
xtarget/lisp/lisp -noinit
</pre>
```
However, this lisp will be missing some functionality like PCL. You
probably now want to use the compiler to rebuild everything once
again. Just follow the directions for a normal build, and use
xtarget/lisp/lisp as your compiler. Be sure to use create-target.sh
to create a new directory where the result can go.
## Cross-Platform Cross-Compile
A cross-platform cross-compile is very similar to a normal
cross-compile, and the basic steps are the same. For the sake of
concreteness, assume we are on ppc/darwin and want to cross-compile
to x86/linux.
To simplify things, we assume that both platforms have access to the
same file system, via NFS or something else.
```
#!html
<ol>
<li> As above, we need to create directories for the cross-compiler and
compiled target. We assume we are on ppc/darwin. So, when running
create-target.sh we need to specify the target:
<pre>
</pre>
<li> Adjust the cross-compilation script. An example for ppc/darwin to
x86/linux is in src/tools/cross-scripts/cross-ppc-x86.lisp.
<li> Build the cross compiler and target, as above, using the specified
cross-compile script:
<pre>
</pre>
where cross.lisp is the cross-compile script from 2) above.
<li> Everything has now been compiled for the x86/linux target. We need
to compile the C code for x86 and create a lisp.core from the
kernel.core. This is where it's useful to have both platforms be
able to access the same file system. If not, you will need to copy
all of the generated files from ppc/darwin to x86/linux. Basically
everything in xtarget needs to be copied.
<p>Note carefully that you may have to edit lisp/internals.h and/or
lisp/internals.inc to have the correct features. This is a known
bug in the generation of these files during cross-compilation.</p>
Compile the lisp code:
<pre>
</pre>
<li> Now run load-world.sh to create the desired lisp.core from lisp and
kernel.core. As above, PCL has not been compiled, so select
restart 3 (return nil from pclload) to create lisp.core
<pre>
</pre>
</ol>
```
At this point, you will have a shiny new lisp on the new platform.
Since it's missing PCL, you will need to do at least one normal build
to get PCL included. This is also a good check to see if everything
was compiled properly. A full set of builds via build.sh might be
good at this point too.
Some of the details for each command may have changed; You can get
help for each command by using the -h argument.
In particular steps 3, 4, and 5 can be combined into one by using the
-c, -r, and -l options for cross-build-world.sh. The -c option cleans
out the targe and cross directories; -r does step 4; and -l does step
5.
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