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diff --git a/com/allegro/README b/com/allegro/README
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+This directory contains command scripts used for building Yale Haskell
+from the source distribution under Franz Allegro Common Lisp.  We've
+been using version 4.1 on both NeXT and Sparc platforms -- don't
+expect our code to work without modifications under earlier versions.
+
+Be sure you load the Allegro patches -- the scripts do this
+automatically.  If you're trying to build on some other kind of
+platform, you'll have to get the equivalent patches from Franz Inc.
+Our code won't work without these bug fixes.
+
+Developers need to source haskell-development instead of haskell-setup
+in the .cshrc file.
+
+To rebuild the system:
+
+* You need to define environment variables Y2 and ALLEGRO to point to the
+  appropriate pathnames.  See the haskell-development script for details.
+
+* Make sure that the environment variable PRELUDEBIN (in the 
+  haskell-setup script) points to $PRELUDE/allegro (or $PRELUDE/allegro-next,
+  as appropriate).
+
+* Execute the "compile" script.  This will recompile all of the Lisp 
+  source files that make up the Yale Haskell system.  Compiled files are
+  put in the "allegro" or "allegro-next" subdirectory of each source directory.
+
+* Execute the "build-prelude" script to compile the standard prelude.  
+  Note that this process tends to use up a huge amount of memory!
+
+* Execute the "savesys" script to build a new executable.
+
+* The new executable is initially called "bin/new-allegro-haskell".  Try
+  it out.  If it works, you should rename it to "bin/allegro-haskell".
+  Make sure that HASKELLPROG (in the haskell-setup script) is correct.
+
+* If you want to build an executable with the X support, you'll also
+  need to run the "build-xlib" and "savesys-xlib" scripts.  You may
+  need to edit these scripts to change the pathname of the file 
+  containing the CLX library (or suppress the load entirely if you
+  are using a Lisp executable with CLX pre-loaded.).
diff --git a/com/allegro/build-prelude b/com/allegro/build-prelude
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+#!/bin/csh
+#
+# build-prelude -- recompile the prelude, saving the old one as old-prelude.*
+#
+#
+cd $Y2
+setenv PRELUDEBIN $Y2/progs/prelude/$ALLEGRODIR
+if (-e $PRELUDEBIN/Prelude.fasl) then
+  rm $PRELUDEBIN/old*
+  foreach i ($PRELUDEBIN/Prelude*.{fasl,scm})
+    mv $i $PRELUDEBIN/old-$i:t
+    end
+  endif
+$ALLEGRO <<EOF
+;; Need a big heap to compile the prelude.
+;;(lcl:change-memory-management :expand 512 :growth-limit 2048)
+#+next (progn (load "com/allegro/next-patches/patch0149.fasl")
+              (load "com/allegro/next-patches/patch0151.fasl"))
+#+sparc (load "com/allegro/sparc-patches/patch0151.fasl")
+(make-package "MUMBLE-IMPLEMENTATION" :use '("LISP"))
+(proclaim '(optimize (speed 3) (safety 0) (compilation-speed 0)))
+(load "cl-support/cl-init")
+(in-package :mumble-user)
+(setf *printers* '(phase-time dump-stat))
+(setf *optimizers* *all-optimizers*)
+;; Set appropriate compiler settings for processing the prelude.
+;; Don't try to compile the interface.
+(setf *code-chunk-size* 300)
+(setf *compile-interface* '#f)
+(compile/compile *prelude-unit-filename*)
+(excl:exit)
+EOF
diff --git a/com/allegro/build-xlib b/com/allegro/build-xlib
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+++ b/com/allegro/build-xlib
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+#!/bin/csh
+#
+# build-xlib -- recompile the xlib stuff
+#
+# note that allegro's loader will look in its lib directory automagically
+# for the clx library
+cd $Y2
+setenv LIBRARYBIN $Y2/progs/lib/X11/$ALLEGRODIR
+rm $LIBRARYBIN/xlib*.sbin
+bin/allegro-haskell <<EOF
+:(lisp:load "clx")
+:(setf *code-quality* 3)
+:compile \$HASKELL_LIBRARY/X11/xlib
+EOF
diff --git a/com/allegro/clean b/com/allegro/clean
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+++ b/com/allegro/clean
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+#!/bin/csh
+#
+# delete Allegro CL binaries
+'rm' $Y2/*/$ALLEGRODIR/*.fasl
+
diff --git a/com/allegro/compile b/com/allegro/compile
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+++ b/com/allegro/compile
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+#!/bin/csh
+#
+# compile -- compile the Yale Haskell system from scratch.
+#
+#
+cd $Y2
+$ALLEGRO <<EOF
+#+next (progn (load "com/allegro/next-patches/patch0149.fasl")
+              (load "com/allegro/next-patches/patch0151.fasl"))
+#+sparc (load "com/allegro/sparc-patches/patch0151.fasl")
+(make-package "MUMBLE-IMPLEMENTATION" :use '("LISP"))
+(proclaim '(optimize (speed 3) (safety 0) (compilation-speed 0)))
+(load "cl-support/cl-init")
+(excl:exit)
+EOF
diff --git a/com/allegro/next-patches/patch0149.fasl b/com/allegro/next-patches/patch0149.fasl
new file mode 100644
index 0000000..da10254
--- /dev/null
+++ b/com/allegro/next-patches/patch0149.fasl
diff --git a/com/allegro/next-patches/patch0151.fasl b/com/allegro/next-patches/patch0151.fasl
new file mode 100644
index 0000000..c954667
--- /dev/null
+++ b/com/allegro/next-patches/patch0151.fasl
diff --git a/com/allegro/savesys b/com/allegro/savesys
new file mode 100755
index 0000000..3d3abd8
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+++ b/com/allegro/savesys
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+#!/bin/csh
+#
+# savesys -- build a saved executable in bin/new-allegro-haskell
+#
+#
+cd $Y2
+setenv PRELUDEBIN $Y2/progs/prelude/$ALLEGRODIR
+if !(-e $PRELUDEBIN/Prelude.fasl) then
+  echo "Build the prelude first, stupid..."
+  exit
+  endif
+$ALLEGRO <<EOF
+;;; Load the Haskell system.
+#+next (progn (load "com/allegro/next-patches/patch0149.fasl")
+              (load "com/allegro/next-patches/patch0151.fasl"))
+#+sparc (load "com/allegro/sparc-patches/patch0151.fasl")
+(make-package "MUMBLE-IMPLEMENTATION" :use '("LISP"))
+(load "cl-support/cl-init")
+;;; Set various internal switches to appropriate values for running
+;;; Haskell code.
+(proclaim '(optimize (speed 3) (safety 0) (compilation-speed 0)))
+(setf *compile-verbose* nil)
+(setf *load-verbose* nil)
+(setf excl:*load-source-file-info* nil)
+(setf excl:*record-source-file-info* nil)
+(setf excl:*load-xref-info* nil)
+(setf excl:*record-source-file-info* nil)
+(in-package :mumble-user)
+(setf *printers* '(compiling loading))
+(setf *optimizers* '())
+(setf *compile-interface* '#f)
+;;; Load the prelude.
+(compile/load *prelude-unit-filename*)
+;;; Set up the saved system.
+(define *saved-readtable* (lisp:copy-readtable lisp:*readtable*))
+(define (haskell-toplevel)
+  ;; Saved system always starts up in USER package.
+  (setf lisp:*package* (lisp:find-package :mumble-user))
+  ;; Saved system seems to forget about our readtable hacks.
+  (setf lisp:*readtable* *saved-readtable*)
+  ;; Set printer variables w/implementation-defined initial values
+  ;; to known values
+  (setf *print-pretty* '#f)
+  (load-init-files)
+  (do () ('#f)
+    (cl:with-simple-restart (restart-haskell "Restart Haskell.")
+      (heval))))
+(define (restart-haskell)
+  (cl:invoke-restart 'restart-haskell))
+(excl:dumplisp
+  :name #+next "bin/new-allegro-next-haskell" #-next "bin/new-allegro-haskell"
+  :restart-function 'haskell-toplevel)
+(excl:exit)
+EOF
diff --git a/com/allegro/savesys-xlib b/com/allegro/savesys-xlib
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+++ b/com/allegro/savesys-xlib
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+#!/bin/csh
+#
+# savesys -- build a saved executable in bin/new-allegro-haskell
+#
+#
+cd $Y2
+setenv PRELUDEBIN $Y2/progs/prelude/$ALLEGRODIR
+if !(-e $PRELUDEBIN/Prelude.fasl) then
+  echo "Build the prelude first, stupid..."
+  exit
+  endif
+setenv LIBRARYBIN $Y2/progs/lib/X11/$ALLEGRODIR
+if !(-e $LIBRARYBIN/xlib.fasl) then
+  echo "Build the xlib stuff first, silly..."
+  exit
+  endif
+$ALLEGRO <<EOF
+;;; Load the Haskell system.
+#+next (progn (load "com/allegro/next-patches/patch0149.fasl")
+              (load "com/allegro/next-patches/patch0151.fasl"))
+#+sparc (load "com/allegro/sparc-patches/patch0151.fasl")
+(make-package "MUMBLE-IMPLEMENTATION" :use '("LISP"))
+(load "cl-support/cl-init")
+;;; Set various internal switches to appropriate values for running
+;;; Haskell code.
+(proclaim '(optimize (speed 3) (safety 0) (compilation-speed 0)))
+(setf *compile-verbose* nil)
+(setf *load-verbose* nil)
+(setf excl:*load-source-file-info* nil)
+(setf excl:*record-source-file-info* nil)
+(setf excl:*load-xref-info* nil)
+(setf excl:*record-source-file-info* nil)
+(in-package :mumble-user)
+(setf *printers* '(compiling loading))
+(setf *optimizers* '())
+(setf *compile-interface* '#f)
+;;; Load the prelude.
+(compile/load *prelude-unit-filename*)
+;;; Load the X support.
+(lisp:load "clx")
+(compile/load "\$HASKELL_LIBRARY/X11/xlib")
+(setf *haskell-compiler-update* 
+	(string-append *haskell-compiler-update* "-X11"))
+;;; Set up the saved system.
+(define *saved-readtable* (lisp:copy-readtable lisp:*readtable*))
+(define (haskell-toplevel)
+  ;; Saved system always starts up in USER package.
+  (setf lisp:*package* (lisp:find-package :mumble-user))
+  ;; Saved system seems to forget about our readtable hacks.
+  (setf lisp:*readtable* *saved-readtable*)
+  ;; Set printer variables w/implementation-defined initial values
+  ;; to known values
+  (setf *print-pretty* '#f)
+  (load-init-files)
+  (do () ('#f)
+    (cl:with-simple-restart (restart-haskell "Restart Haskell.")
+      (heval))))
+(define (restart-haskell)
+  (cl:invoke-restart 'restart-haskell))
+(excl:dumplisp
+  :name #+next "bin/new-allegro-next-clx-haskell"
+        #-next "bin/new-allegro-clx-haskell"
+  :restart-function 'haskell-toplevel)
+(excl:exit)
+EOF
diff --git a/com/allegro/sparc-patches/patch0151.fasl b/com/allegro/sparc-patches/patch0151.fasl
new file mode 100644
index 0000000..cfbc48f
--- /dev/null
+++ b/com/allegro/sparc-patches/patch0151.fasl