updated for version 7.2-191v7.2.191

12 files changed, 1093 insertions, 494 deletions

diff --git a/src/Make_ming.mak b/src/Make_ming.mak
index 6d28e46685..e0717b62ae 100644
--- a/src/Make_ming.mak
+++ b/src/Make_ming.mak
@@ -115,8 +115,21 @@ ifndef MZSCHEME_VER
 MZSCHEME_VER=205_000
 endif
 
+ifndef MZSCHEME_PRECISE_GC
+MZSCHEME_PRECISE_GC=no
+endif
+
+# for version 4.x we need to generate byte-code for Scheme base
+ifndef MZSCHEME_GENERATE_BASE
+MZSCHEME_GENERATE_BASE=no
+endif
+
 ifeq (no,$(DYNAMIC_MZSCHEME))
+ifeq (yes,$(MZSCHEME_PRECISE_GC))
+MZSCHEME_LIB=-lmzsch$(MZSCHEME_VER)
+else
 MZSCHEME_LIB = -lmzsch$(MZSCHEME_VER) -lmzgc$(MZSCHEME_VER)
+endif
 # the modern MinGW can dynamically link to dlls directly.
 # point MZSCHEME_DLLS to where you put libmzschXXXXXXX.dll and libgcXXXXXXX.dll
 ifndef MZSCHEME_DLLS
@@ -410,6 +423,13 @@ endif
 ifdef MZSCHEME
 OBJ += $(OUTDIR)/if_mzsch.o
 MZSCHEME_INCL = if_mzsch.h
+ifeq (yes,$(MZSCHEME_GENERATE_BASE))
+CFLAGS += -DINCLUDE_MZSCHEME_BASE
+MZ_EXTRA_DEP += mzscheme_base.c
+endif
+ifeq (yes,$(MZSCHEME_PRECISE_GC))
+CFLAGS += -DMZ_PRECISE_GC
+endif
 endif
 ifdef PYTHON
 OBJ += $(OUTDIR)/if_python.o
@@ -588,6 +608,12 @@ if_perl.c: if_perl.xs typemap
 $(OUTDIR)/netbeans.o:	netbeans.c $(INCL) $(NBDEBUG_INCL) $(NBDEBUG_SRC)
 	$(CC) -c $(CFLAGS) netbeans.c -o $(OUTDIR)/netbeans.o
 
+$(OUTDIR)/if_mzsch.o:	if_mzsch.c $(INCL) if_mzsch.h $(MZ_EXTRA_DEP)
+	$(CC) -c $(CFLAGS) if_mzsch.c -o $(OUTDIR)/if_mzsch.o
+
+mzscheme_base.c:
+	$(MZSCHEME)/mzc --c-mods mzscheme_base.c ++lib scheme/base
+
 pathdef.c: $(INCL)
 ifneq (sh.exe, $(SHELL))
 	@echo creating pathdef.c
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 545c94d341..1782586960 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -34,6 +34,7 @@
 #	  MZSCHEME=[Path to MzScheme directory]
 #	  DYNAMIC_MZSCHEME=yes (to load the MzScheme DLLs dynamically)
 #	  MZSCHEME_VER=[version, 205_000, ...]
+#	  MZSCHEME_DEBUG=no
 #
 #	Perl interface:
 #	  PERL=[Path to Perl directory]
@@ -621,15 +622,37 @@ PYTHON_LIB = $(PYTHON)\libs\python$(PYTHON_VER).lib
 MZSCHEME_VER = 205_000
 !endif
 CFLAGS = $(CFLAGS) -DFEAT_MZSCHEME -I $(MZSCHEME)\include
+!if EXIST("$(MZSCHEME)\collects\scheme\base.ss")
+# for MzScheme 4.x we need to include byte code for basic Scheme stuff
+MZSCHEME_EXTRA_DEP = mzscheme_base.c
+CFLAGS = $(CFLAGS) -DINCLUDE_MZSCHEME_BASE
+!endif
+!if EXIST("$(MZSCHEME)\lib\msvc\libmzsch$(MZSCHEME_VER).lib") \
+	&& !EXIST("$(MZSCHEME)\lib\msvc\libmzgc$(MZSCHEME_VER).lib")
+!message Building with Precise GC
+MZSCHEME_PRECISE_GC = yes
+CFLAGS = $(CFLAGS) -DMZ_PRECISE_GC
+!endif
 !if "$(DYNAMIC_MZSCHEME)" == "yes"
+!if "$(MZSCHEME_PRECISE_GC)" == "yes"
+!error MzScheme with Precise GC cannot be loaded dynamically
+!endif
 !message MzScheme DLLs will be loaded dynamically
 CFLAGS = $(CFLAGS) -DDYNAMIC_MZSCHEME \
 		-DDYNAMIC_MZSCH_DLL=\"libmzsch$(MZSCHEME_VER).dll\" \
 		-DDYNAMIC_MZGC_DLL=\"libmzgc$(MZSCHEME_VER).dll\"
 !else
+!if "$(MZSCHEME_DEBUG)" == "yes"
+CFLAGS = $(CFLAGS) -DMZSCHEME_FORCE_GC
+!endif
+!if "$(MZSCHEME_PRECISE_GC)" == "yes"
+# Precise GC does not use separate dll
+MZSCHEME_LIB = $(MZSCHEME)\lib\msvc\libmzsch$(MZSCHEME_VER).lib
+!else
 MZSCHEME_LIB = $(MZSCHEME)\lib\msvc\libmzgc$(MZSCHEME_VER).lib \
 		$(MZSCHEME)\lib\msvc\libmzsch$(MZSCHEME_VER).lib
 !endif
+!endif
 MZSCHEME_OBJ = $(OUTDIR)\if_mzsch.obj
 !endif
 
@@ -930,9 +953,11 @@ $(OUTDIR)/if_perl.obj: $(OUTDIR) if_perl.c  $(INCL)
 $(OUTDIR)/if_perlsfio.obj: $(OUTDIR) if_perlsfio.c  $(INCL)
 	$(CC) $(CFLAGS) $(PERL_INC) if_perlsfio.c
 
-$(OUTDIR)/if_mzsch.obj: $(OUTDIR) if_mzsch.c  $(INCL)
+$(OUTDIR)/if_mzsch.obj: $(OUTDIR) if_mzsch.c  $(INCL) $(MZSCHEME_EXTRA_DEP)
 	$(CC) $(CFLAGS) if_mzsch.c \
 		-DMZSCHEME_COLLECTS=\"$(MZSCHEME:\=\\)\\collects\"
+mzscheme_base.c:
+	$(MZSCHEME)\mzc --c-mods mzscheme_base.c ++lib scheme/base
 
 $(OUTDIR)/if_python.obj: $(OUTDIR) if_python.c  $(INCL)
 	$(CC) $(CFLAGS) $(PYTHON_INC) if_python.c
diff --git a/src/Makefile b/src/Makefile
index e6d26b1641..02b8d6cb82 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -536,7 +536,7 @@ CClink = $(CC)
 # Use this with GCC to check for mistakes, unused arguments, etc.
 #CFLAGS = -g -Wall -Wextra -Wmissing-prototypes -Wunreachable-code
 #PYTHON_CFLAGS_EXTRA = -Wno-missing-field-initializers
-#MZSCHEME_CFLAGS_EXTRA = -Wno-unreachable-code
+#MZSCHEME_CFLAGS_EXTRA = -Wno-unreachable-code -Wno-unused-parameter
 
 # EFENCE - Electric-Fence malloc debugging: catches memory accesses beyond
 # allocated memory (and makes every malloc()/free() very slow).
@@ -2200,6 +2200,7 @@ clean celan: testclean
 	-rm -f $(TOOLS) auto/osdef.h auto/pathdef.c auto/if_perl.c
 	-rm -f conftest* *~ auto/link.sed
 	-rm -rf $(APPDIR)
+	-rm -rf mzscheme_base.c
 	if test -d $(PODIR); then \
 		cd $(PODIR); $(MAKE) prefix=$(DESTDIR)$(prefix) clean; \
 	fi
@@ -2433,8 +2434,11 @@ objects/if_cscope.o: if_cscope.c
 objects/if_xcmdsrv.o: if_xcmdsrv.c
 	$(CCC) -o $@ if_xcmdsrv.c
 
-objects/if_mzsch.o: if_mzsch.c
+objects/if_mzsch.o: if_mzsch.c $(MZSCHEME_EXTRA)
 	$(CCC) -o $@ $(MZSCHEME_CFLAGS_EXTRA) if_mzsch.c
+ 
+mzscheme_base.c:
+	$(MZSCHEME_MZC) --c-mods mzscheme_base.c ++lib scheme/base
 
 objects/if_perl.o: auto/if_perl.c
 	$(CCC) -o $@ auto/if_perl.c
diff --git a/src/auto/configure b/src/auto/configure
index 596e0349d5..42f4784ddc 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -701,6 +701,8 @@ PERL_SRC
 shrpenv
 vi_cv_perllib
 vi_cv_path_perl
+MZSCHEME_MZC
+MZSCHEME_EXTRA
 MZSCHEME_CFLAGS
 MZSCHEME_LIBS
 MZSCHEME_PRO
@@ -4641,8 +4643,8 @@ $as_echo_n "checking PLTHOME environment var... " >&6; }
 $as_echo "\"$PLTHOME\"" >&6; }
 	vi_cv_path_mzscheme_pfx="$PLTHOME"
     else
-	{ $as_echo "$as_me:$LINENO: result: \"not set\"" >&5
-$as_echo "\"not set\"" >&6; }
+	{ $as_echo "$as_me:$LINENO: result: not set" >&5
+$as_echo "not set" >&6; }
 		# Extract the first word of "mzscheme", so it can be a program name with args.
 set dummy mzscheme; ac_word=$2
 { $as_echo "$as_me:$LINENO: checking for $ac_word" >&5
@@ -4697,16 +4699,16 @@ $as_echo_n "checking MzScheme install prefix... " >&6; }
 if test "${vi_cv_path_mzscheme_pfx+set}" = set; then
   $as_echo_n "(cached) " >&6
 else
-   vi_cv_path_mzscheme_pfx=`
-	    ${vi_cv_path_mzscheme} -evm \
-	    "(display (simplify-path		\
+  	    	    echo "(display (simplify-path		\
 	       (build-path (call-with-values	\
 		(lambda () (split-path (find-system-path (quote exec-file)))) \
-		(lambda (base name must-be-dir?) base)) (quote up))))"`
+		(lambda (base name must-be-dir?) base)) (quote up))))" > mzdirs.scm
+	    	     vi_cv_path_mzscheme_pfx=`${vi_cv_path_mzscheme} -r mzdirs.scm | \
+		sed -e 's+/$++'`
 fi
 { $as_echo "$as_me:$LINENO: result: $vi_cv_path_mzscheme_pfx" >&5
 $as_echo "$vi_cv_path_mzscheme_pfx" >&6; }
-	    	    vi_cv_path_mzscheme_pfx=`echo "$vi_cv_path_mzscheme_pfx" | sed 's+/$++'`
+	    rm -f mzdirs.scm
 	fi
     fi
   fi
@@ -4716,21 +4718,32 @@ $as_echo "$vi_cv_path_mzscheme_pfx" >&6; }
     { $as_echo "$as_me:$LINENO: checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include" >&5
 $as_echo_n "checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include... " >&6; }
     if test -f $vi_cv_path_mzscheme_pfx/include/scheme.h; then
-      { $as_echo "$as_me:$LINENO: result: \"yes\"" >&5
-$as_echo "\"yes\"" >&6; }
+      SCHEME_INC=${vi_cv_path_mzscheme_pfx}/include
+      { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
     else
-      { $as_echo "$as_me:$LINENO: result: \"no\"" >&5
-$as_echo "\"no\"" >&6; }
-      { $as_echo "$as_me:$LINENO: checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/plt/include" >&5
-$as_echo_n "checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/plt/include... " >&6; }
+      { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+      { $as_echo "$as_me:$LINENO: checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include/plt" >&5
+$as_echo_n "checking if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include/plt... " >&6; }
       if test -f $vi_cv_path_mzscheme_pfx/include/plt/scheme.h; then
-	{ $as_echo "$as_me:$LINENO: result: \"yes\"" >&5
-$as_echo "\"yes\"" >&6; }
-	SCHEME_INC=/plt
+	{ $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+	SCHEME_INC=${vi_cv_path_mzscheme_pfx}/include/plt
       else
-	{ $as_echo "$as_me:$LINENO: result: \"no\"" >&5
-$as_echo "\"no\"" >&6; }
-	vi_cv_path_mzscheme_pfx=
+	{ $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+	{ $as_echo "$as_me:$LINENO: checking if scheme.h can be found in /usr/include/plt/" >&5
+$as_echo_n "checking if scheme.h can be found in /usr/include/plt/... " >&6; }
+	if test -f /usr/include/plt/scheme.h; then
+	  { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+	  SCHEME_INC=/usr/include/plt
+	else
+	  { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+	  vi_cv_path_mzscheme_pfx=
+	fi
       fi
     fi
   fi
@@ -4738,21 +4751,34 @@ $as_echo "\"no\"" >&6; }
   if test "X$vi_cv_path_mzscheme_pfx" != "X"; then
     if test "x$MACOSX" = "xyes"; then
       MZSCHEME_LIBS="-framework PLT_MzScheme"
+    elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.a"; then
+      MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.a"
+      MZSCHEME_CFLAGS="-DMZ_PRECISE_GC"
     elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
       MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme.a ${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"
     else
-      MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
+            if test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.so"; then
+        MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme3m"
+	MZSCHEME_CFLAGS="-DMZ_PRECISE_GC"
+      else
+        MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
+      fi
       if test "$GCC" = yes; then
-			MZSCHEME_LIBS="$MZSCHEME_LIBS -Wl,-rpath -Wl,${vi_cv_path_mzscheme_pfx}/lib"
+			MZSCHEME_LIBS="${MZSCHEME_LIBS} -Wl,-rpath -Wl,${vi_cv_path_mzscheme_pfx}/lib"
       elif test "`(uname) 2>/dev/null`" = SunOS &&
 			       uname -r | grep '^5' >/dev/null; then
-	MZSCHEME_LIBS="$MZSCHEME_LIBS -R ${vi_cv_path_mzscheme_pfx}/lib"
+	MZSCHEME_LIBS="${MZSCHEME_LIBS} -R ${vi_cv_path_mzscheme_pfx}/lib"
       fi
     fi
     if test -d $vi_cv_path_mzscheme_pfx/lib/plt/collects; then
       SCHEME_COLLECTS=lib/plt/
     fi
-    MZSCHEME_CFLAGS="-I${vi_cv_path_mzscheme_pfx}/include${SCHEME_INC}   \
+    if test -f "${vi_cv_path_mzscheme_pfx}/${SCHEME_COLLECTS}collects/scheme/base.ss" ; then
+            MZSCHEME_EXTRA="mzscheme_base.c"
+      MZSCHEME_CFLAGS="${MZSCHEME_CFLAGS} -DINCLUDE_MZSCHEME_BASE"
+      MZSCHEME_MZC="${vi_cv_path_mzscheme_pfx}/bin/mzc"
+    fi
+    MZSCHEME_CFLAGS="${MZSCHEME_CFLAGS} -I${SCHEME_INC} \
       -DMZSCHEME_COLLECTS='\"${vi_cv_path_mzscheme_pfx}/${SCHEME_COLLECTS}collects\"'"
     MZSCHEME_SRC="if_mzsch.c"
     MZSCHEME_OBJ="objects/if_mzsch.o"
@@ -4767,6 +4793,8 @@ _ACEOF
 
 
 
+
+
 fi
 
 
diff --git a/src/config.mk.in b/src/config.mk.in
index 9590d445a1..f36e676c19 100644
--- a/src/config.mk.in
+++ b/src/config.mk.in
@@ -41,6 +41,8 @@ MZSCHEME_SRC	= @MZSCHEME_SRC@
 MZSCHEME_OBJ	= @MZSCHEME_OBJ@
 MZSCHEME_CFLAGS	= @MZSCHEME_CFLAGS@
 MZSCHEME_PRO	= @MZSCHEME_PRO@
+MZSCHEME_EXTRA  = @MZSCHEME_EXTRA@
+MZSCHEME_MZC	= @MZSCHEME_MZC@
 
 PERL		= @vi_cv_path_perl@
 PERLLIB		= @vi_cv_perllib@
diff --git a/src/configure.in b/src/configure.in
index a644d941fc..eb7db76747 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -414,7 +414,7 @@ if test "$enable_mzschemeinterp" = "yes"; then
 	AC_MSG_RESULT("$PLTHOME")
 	vi_cv_path_mzscheme_pfx="$PLTHOME"
     else
-	AC_MSG_RESULT("not set")
+	AC_MSG_RESULT(not set)
 	dnl -- try to find MzScheme executable
 	AC_PATH_PROG(vi_cv_path_mzscheme, mzscheme)
 
@@ -430,14 +430,16 @@ if test "$enable_mzschemeinterp" = "yes"; then
 	if test "X$vi_cv_path_mzscheme" != "X"; then
 	    dnl -- find where MzScheme thinks it was installed
 	    AC_CACHE_CHECK(MzScheme install prefix,vi_cv_path_mzscheme_pfx,
-	    [ vi_cv_path_mzscheme_pfx=`
-	    ${vi_cv_path_mzscheme} -evm \
-	    "(display (simplify-path		\
+	    dnl different versions of MzScheme differ in command line processing
+	    dnl use universal approach
+	    echo "(display (simplify-path		\
 	       (build-path (call-with-values	\
 		(lambda () (split-path (find-system-path (quote exec-file)))) \
-		(lambda (base name must-be-dir?) base)) (quote up))))"` ])
-	    dnl Remove a trailing slash.
-	    vi_cv_path_mzscheme_pfx=`echo "$vi_cv_path_mzscheme_pfx" | sed 's+/$++'`
+		(lambda (base name must-be-dir?) base)) (quote up))))" > mzdirs.scm
+	    dnl Remove a trailing slash
+	    [ vi_cv_path_mzscheme_pfx=`${vi_cv_path_mzscheme} -r mzdirs.scm | \
+		sed -e 's+/$++'` ])
+	    rm -f mzdirs.scm
 	fi
     fi
   fi
@@ -446,16 +448,24 @@ if test "$enable_mzschemeinterp" = "yes"; then
   if test "X$vi_cv_path_mzscheme_pfx" != "X"; then
     AC_MSG_CHECKING(if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include)
     if test -f $vi_cv_path_mzscheme_pfx/include/scheme.h; then
-      AC_MSG_RESULT("yes")
+      SCHEME_INC=${vi_cv_path_mzscheme_pfx}/include
+      AC_MSG_RESULT(yes)
     else
-      AC_MSG_RESULT("no")
-      AC_MSG_CHECKING(if scheme.h can be found in $vi_cv_path_mzscheme_pfx/plt/include)
+      AC_MSG_RESULT(no)
+      AC_MSG_CHECKING(if scheme.h can be found in $vi_cv_path_mzscheme_pfx/include/plt)
       if test -f $vi_cv_path_mzscheme_pfx/include/plt/scheme.h; then
-	AC_MSG_RESULT("yes")
-	SCHEME_INC=/plt
+	AC_MSG_RESULT(yes)
+	SCHEME_INC=${vi_cv_path_mzscheme_pfx}/include/plt
       else
-	AC_MSG_RESULT("no")
-	vi_cv_path_mzscheme_pfx=
+	AC_MSG_RESULT(no)
+	AC_MSG_CHECKING(if scheme.h can be found in /usr/include/plt/)
+	if test -f /usr/include/plt/scheme.h; then
+	  AC_MSG_RESULT(yes)
+	  SCHEME_INC=/usr/include/plt
+	else
+	  AC_MSG_RESULT(no)
+	  vi_cv_path_mzscheme_pfx=
+	fi
       fi
     fi
   fi
@@ -463,23 +473,38 @@ if test "$enable_mzschemeinterp" = "yes"; then
   if test "X$vi_cv_path_mzscheme_pfx" != "X"; then
     if test "x$MACOSX" = "xyes"; then
       MZSCHEME_LIBS="-framework PLT_MzScheme"
+    elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.a"; then
+      MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.a"
+      MZSCHEME_CFLAGS="-DMZ_PRECISE_GC"
     elif test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"; then
       MZSCHEME_LIBS="${vi_cv_path_mzscheme_pfx}/lib/libmzscheme.a ${vi_cv_path_mzscheme_pfx}/lib/libmzgc.a"
     else
-      MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
+      dnl Using shared objects
+      if test -f "${vi_cv_path_mzscheme_pfx}/lib/libmzscheme3m.so"; then
+        MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme3m"
+	MZSCHEME_CFLAGS="-DMZ_PRECISE_GC"
+      else
+        MZSCHEME_LIBS="-L${vi_cv_path_mzscheme_pfx}/lib -lmzscheme -lmzgc"
+      fi
       if test "$GCC" = yes; then
 	dnl Make Vim remember the path to the library.  For when it's not in
 	dnl $LD_LIBRARY_PATH.
-	MZSCHEME_LIBS="$MZSCHEME_LIBS -Wl,-rpath -Wl,${vi_cv_path_mzscheme_pfx}/lib"
+	MZSCHEME_LIBS="${MZSCHEME_LIBS} -Wl,-rpath -Wl,${vi_cv_path_mzscheme_pfx}/lib"
       elif test "`(uname) 2>/dev/null`" = SunOS &&
 			       uname -r | grep '^5' >/dev/null; then
-	MZSCHEME_LIBS="$MZSCHEME_LIBS -R ${vi_cv_path_mzscheme_pfx}/lib"
+	MZSCHEME_LIBS="${MZSCHEME_LIBS} -R ${vi_cv_path_mzscheme_pfx}/lib"
       fi
     fi
     if test -d $vi_cv_path_mzscheme_pfx/lib/plt/collects; then
       SCHEME_COLLECTS=lib/plt/
     fi
-    MZSCHEME_CFLAGS="-I${vi_cv_path_mzscheme_pfx}/include${SCHEME_INC}   \
+    if test -f "${vi_cv_path_mzscheme_pfx}/${SCHEME_COLLECTS}collects/scheme/base.ss" ; then
+      dnl need to generate bytecode for MzScheme base
+      MZSCHEME_EXTRA="mzscheme_base.c"
+      MZSCHEME_CFLAGS="${MZSCHEME_CFLAGS} -DINCLUDE_MZSCHEME_BASE"
+      MZSCHEME_MZC="${vi_cv_path_mzscheme_pfx}/bin/mzc"
+    fi
+    MZSCHEME_CFLAGS="${MZSCHEME_CFLAGS} -I${SCHEME_INC} \
       -DMZSCHEME_COLLECTS='\"${vi_cv_path_mzscheme_pfx}/${SCHEME_COLLECTS}collects\"'"
     MZSCHEME_SRC="if_mzsch.c"
     MZSCHEME_OBJ="objects/if_mzsch.o"
@@ -491,6 +516,8 @@ if test "$enable_mzschemeinterp" = "yes"; then
   AC_SUBST(MZSCHEME_PRO)
   AC_SUBST(MZSCHEME_LIBS)
   AC_SUBST(MZSCHEME_CFLAGS)
+  AC_SUBST(MZSCHEME_EXTRA)
+  AC_SUBST(MZSCHEME_MZC)
 fi
 
 
diff --git a/src/eval.c b/src/eval.c
index 2e3d9fd772..bf0c3030f7 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -5866,7 +5866,7 @@ list_equal(l1, l2, ic)
     return item1 == NULL && item2 == NULL;
 }
 
-#if defined(FEAT_PYTHON) || defined(PROTO)
+#if defined(FEAT_PYTHON) || defined(FEAT_MZSCHEME) || defined(PROTO)
 /*
  * Return the dictitem that an entry in a hashtable points to.
  */
diff --git a/src/if_mzsch.c b/src/if_mzsch.c
index 7f43cab6ed..017f8041ed 100644
--- a/src/if_mzsch.c
+++ b/src/if_mzsch.c
@@ -4,6 +4,8 @@
  * Original work by Brent Fulgham <bfulgham@debian.org>
  * (Based on lots of help from Matthew Flatt)
  *
+ * TODO Convert byte-strings to char strings?
+ *
  * This consists of six parts:
  * 1. MzScheme interpreter main program
  * 2. Routines that handle the external interface between MzScheme and
@@ -18,7 +20,7 @@
  *    garbage collector will do it self
  * 2. Requires at least NORMAL features. I can't imagine why one may want
  *    to build with SMALL or TINY features but with MzScheme interface.
- * 3. I don't use K&R-style functions. Anyway, MzScheme headers are ANSI.
+ * 3. I don't use K&R-style functions. Anyways, MzScheme headers are ANSI.
  */
 
 #include "vim.h"
@@ -29,14 +31,15 @@
  * depend". */
 #if defined(FEAT_MZSCHEME) || defined(PROTO)
 
+#include <assert.h>
+
 /* Base data structures */
 #define SCHEME_VIMBUFFERP(obj)  SAME_TYPE(SCHEME_TYPE(obj), mz_buffer_type)
 #define SCHEME_VIMWINDOWP(obj)  SAME_TYPE(SCHEME_TYPE(obj), mz_window_type)
 
 typedef struct
 {
-    Scheme_Type	    tag;
-    Scheme_Env	    *env;
+    Scheme_Object   so;
     buf_T	    *buf;
 } vim_mz_buffer;
 
@@ -44,7 +47,7 @@ typedef struct
 
 typedef struct
 {
-    Scheme_Type	    tag;
+    Scheme_Object   so;
     win_T	    *win;
 } vim_mz_window;
 
@@ -67,19 +70,6 @@ typedef struct
     Scheme_Object   *port;
 } Port_Info;
 
-/* info for closed prim */
-/*
- * data have different means:
- * for do_eval it is char*
- * for do_apply is Apply_Onfo*
- * for do_load is Port_Info*
- */
-typedef struct
-{
-    void	*data;
-    Scheme_Env	*env;
-} Cmd_Info;
-
 /* info for do_apply */
 typedef struct
 {
@@ -122,7 +112,6 @@ static Scheme_Object *set_buffer_line_list(void *, int, Scheme_Object **);
 static Scheme_Object *insert_buffer_line_list(void *, int, Scheme_Object **);
 static Scheme_Object *get_range_start(void *, int, Scheme_Object **);
 static Scheme_Object *get_range_end(void *, int, Scheme_Object **);
-static Scheme_Object *get_buffer_namespace(void *, int, Scheme_Object **);
 static vim_mz_buffer *get_vim_curr_buffer(void);
 
 /*  Window-related commands */
@@ -163,8 +152,6 @@ static int vim_error_check(void);
 static int do_mzscheme_command(exarg_T *, void *, Scheme_Closed_Prim *what);
 static void startup_mzscheme(void);
 static char *string_to_line(Scheme_Object *obj);
-static int mzscheme_io_init(void);
-static void mzscheme_interface_init(vim_mz_buffer *self);
 static void do_output(char *mesg, long len);
 static void do_printf(char *format, ...);
 static void do_flush(void);
@@ -174,19 +161,52 @@ static Scheme_Object *extract_exn_message(Scheme_Object *v);
 static Scheme_Object *do_eval(void *, int noargc, Scheme_Object **noargv);
 static Scheme_Object *do_load(void *, int noargc, Scheme_Object **noargv);
 static Scheme_Object *do_apply(void *, int noargc, Scheme_Object **noargv);
-static void register_vim_exn(Scheme_Env *env);
+static void register_vim_exn(void);
 static vim_mz_buffer *get_buffer_arg(const char *fname, int argnum,
 	int argc, Scheme_Object **argv);
 static vim_mz_window *get_window_arg(const char *fname, int argnum,
 	int argc, Scheme_Object **argv);
-static void add_vim_exn(Scheme_Env *env);
 static int line_in_range(linenr_T, buf_T *);
 static void check_line_range(linenr_T, buf_T *);
 static void mz_fix_cursor(int lo, int hi, int extra);
 
-static int eval_in_namespace(void *, Scheme_Closed_Prim *, Scheme_Env *,
-		Scheme_Object **ret);
-static void make_modules(Scheme_Env *);
+static int eval_with_exn_handling(void *, Scheme_Closed_Prim *,
+	    Scheme_Object **ret);
+static void make_modules(void);
+static void init_exn_catching_apply(void);
+static int mzscheme_env_main(Scheme_Env *env, int argc, char **argv);
+static int mzscheme_init(void);
+#ifdef FEAT_EVAL
+static Scheme_Object *vim_to_mzscheme(typval_T *vim_value, int depth,
+	Scheme_Hash_Table *visited);
+#endif
+
+#ifdef MZ_PRECISE_GC
+static int buffer_size_proc(void *obj)
+{
+    return gcBYTES_TO_WORDS(sizeof(vim_mz_buffer));
+}
+static int buffer_mark_proc(void *obj)
+{
+    return buffer_size_proc(obj);
+}
+static int buffer_fixup_proc(void *obj)
+{
+    return buffer_size_proc(obj);
+}
+static int window_size_proc(void *obj)
+{
+    return gcBYTES_TO_WORDS(sizeof(vim_mz_window));
+}
+static int window_mark_proc(void *obj)
+{
+    return window_size_proc(obj);
+}
+static int window_fixup_proc(void *obj)
+{
+    return window_size_proc(obj);
+}
+#endif
 
 #ifdef DYNAMIC_MZSCHEME
 
@@ -260,8 +280,6 @@ static Scheme_Object *(*dll_scheme_make_closed_prim_w_arity)
     (Scheme_Closed_Prim *prim, void *data, const char *name, mzshort mina,
      mzshort maxa);
 static Scheme_Object *(*dll_scheme_make_integer_value)(long i);
-static Scheme_Object *(*dll_scheme_make_namespace)(int argc,
-	Scheme_Object *argv[]);
 static Scheme_Object *(*dll_scheme_make_pair)(Scheme_Object *car,
 	Scheme_Object *cdr);
 static Scheme_Object *(*dll_scheme_make_prim_w_arity)(Scheme_Prim *prim,
@@ -311,6 +329,17 @@ static Scheme_Object *(*dll_scheme_char_string_to_byte_string)
 static Scheme_Object *(*dll_scheme_char_string_to_path)
     (Scheme_Object *s);
 # endif
+static Scheme_Hash_Table *(*dll_scheme_make_hash_table)(int type);
+static void (*dll_scheme_hash_set)(Scheme_Hash_Table *table,
+	Scheme_Object *key, Scheme_Object *value);
+static Scheme_Object *(*dll_scheme_hash_get)(Scheme_Hash_Table *table,
+	Scheme_Object *key);
+static Scheme_Object *(*dll_scheme_make_double)(double d);
+# ifdef INCLUDE_MZSCHEME_BASE
+static Scheme_Object *(*dll_scheme_make_sized_byte_string)(char *chars,
+	long len, int copy);
+static Scheme_Object *(*dll_scheme_namespace_require)(Scheme_Object *req);
+# endif
 
 /* arrays are imported directly */
 # define scheme_eof dll_scheme_eof
@@ -368,7 +397,6 @@ static Scheme_Object *(*dll_scheme_char_string_to_path)
 # define scheme_lookup_global dll_scheme_lookup_global
 # define scheme_make_closed_prim_w_arity dll_scheme_make_closed_prim_w_arity
 # define scheme_make_integer_value dll_scheme_make_integer_value
-# define scheme_make_namespace dll_scheme_make_namespace
 # define scheme_make_pair dll_scheme_make_pair
 # define scheme_make_prim_w_arity dll_scheme_make_prim_w_arity
 # if MZSCHEME_VERSION_MAJOR < 299
@@ -403,6 +431,14 @@ static Scheme_Object *(*dll_scheme_char_string_to_path)
 #  define scheme_char_string_to_path \
     dll_scheme_char_string_to_path
 # endif
+# define scheme_make_hash_table dll_scheme_make_hash_table
+# define scheme_hash_set dll_scheme_hash_set
+# define scheme_hash_get dll_scheme_hash_get
+# define scheme_make_double dll_scheme_make_double
+# ifdef INCLUDE_MZSCHEME_BASE
+#  define scheme_make_sized_byte_string dll_scheme_make_sized_byte_string
+#  define scheme_namespace_require dll_scheme_namespace_require
+# endif
 
 typedef struct
 {
@@ -468,7 +504,6 @@ static Thunk_Info mzsch_imports[] = {
     {"scheme_make_closed_prim_w_arity",
 	(void **)&dll_scheme_make_closed_prim_w_arity},
     {"scheme_make_integer_value", (void **)&dll_scheme_make_integer_value},
-    {"scheme_make_namespace", (void **)&dll_scheme_make_namespace},
     {"scheme_make_pair", (void **)&dll_scheme_make_pair},
     {"scheme_make_prim_w_arity", (void **)&dll_scheme_make_prim_w_arity},
 # if MZSCHEME_VERSION_MAJOR < 299
@@ -502,9 +537,16 @@ static Thunk_Info mzsch_imports[] = {
     {"scheme_current_config", (void **)&dll_scheme_current_config},
     {"scheme_char_string_to_byte_string",
 	(void **)&dll_scheme_char_string_to_byte_string},
-    {"scheme_char_string_to_path",
-	(void **)&dll_scheme_char_string_to_path},
+    {"scheme_char_string_to_path", (void **)&dll_scheme_char_string_to_path},
 # endif
+    {"scheme_make_hash_table", (void **)&dll_scheme_make_hash_table},
+    {"scheme_hash_set", (void **)&dll_scheme_hash_set},
+    {"scheme_hash_get", (void **)&dll_scheme_hash_get},
+    {"scheme_make_double", (void **)&dll_scheme_make_double},
+# ifdef INCLUDE_MZSCHEME_BASE
+    {"scheme_make_sized_byte_string", (void **)&dll_scheme_make_sized_byte_string},
+    {"scheme_namespace_require", (void **)&dll_scheme_namespace_require},
+#endif
     {NULL, NULL}};
 
 static HINSTANCE hMzGC = 0;
@@ -592,6 +634,11 @@ dynamic_mzscheme_end(void)
 }
 #endif /* DYNAMIC_MZSCHEME */
 
+/* need to put it here for dynamic stuff to work */
+#ifdef INCLUDE_MZSCHEME_BASE
+# include "mzscheme_base.c"
+#endif
+
 /*
  *========================================================================
  *  1. MzScheme interpreter startup
@@ -601,21 +648,22 @@ dynamic_mzscheme_end(void)
 static Scheme_Type mz_buffer_type;
 static Scheme_Type mz_window_type;
 
-static int initialized = 0;
+static int initialized = FALSE;
 
 /* global environment */
 static Scheme_Env    *environment = NULL;
 /* output/error handlers */
 static Scheme_Object *curout = NULL;
 static Scheme_Object *curerr = NULL;
-/* vim:exn exception */
+/* exn:vim exception */
 static Scheme_Object *exn_catching_apply = NULL;
 static Scheme_Object *exn_p = NULL;
 static Scheme_Object *exn_message = NULL;
 static Scheme_Object *vim_exn = NULL; /* Vim Error exception */
- /* values for exn:vim - constructor, predicate, accessors etc */
-static Scheme_Object *vim_exn_names = NULL;
-static Scheme_Object *vim_exn_values = NULL;
+
+#if !defined(MZ_PRECISE_GC) || MZSCHEME_VERSION_MAJOR < 400
+static void *stack_base = NULL;
+#endif
 
 static long range_start;
 static long range_end;
@@ -668,10 +716,10 @@ static void remove_timer(void);
 timer_proc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
 # elif defined(FEAT_GUI_GTK)
     static gint
-timer_proc(gpointer data UNUSED)
+timer_proc(gpointer data)
 # elif defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)
     static void
-timer_proc(XtPointer timed_out UNUSED, XtIntervalId *interval_id UNUSED)
+timer_proc(XtPointer timed_out, XtIntervalId *interval_id)
 # elif defined(FEAT_GUI_MAC)
     pascal void
 timer_proc(EventLoopTimerRef theTimer, void *userData)
@@ -751,12 +799,64 @@ mzscheme_end(void)
 #endif
 }
 
+    void
+mzscheme_main(void)
+{
+#if defined(MZ_PRECISE_GC) && MZSCHEME_VERSION_MAJOR >= 400
+    /* use trampoline for precise GC in MzScheme >= 4.x */
+    scheme_main_setup(TRUE, mzscheme_env_main, 0, NULL);
+#else
+    mzscheme_env_main(NULL, 0, NULL);
+#endif
+}
+
+    static int
+mzscheme_env_main(Scheme_Env *env, int argc, char **argv)
+{
+    /* neither argument nor return values are used */
+#ifdef MZ_PRECISE_GC
+# if MZSCHEME_VERSION_MAJOR < 400
+    /*
+     * Starting from version 4.x, embedding applications must use
+     * scheme_main_setup/scheme_main_stack_setup trampolines
+     * rather than setting stack base directly with scheme_set_stack_base
+     */
+    Scheme_Object   *dummy = NULL;
+    MZ_GC_DECL_REG(1);
+    MZ_GC_VAR_IN_REG(0, dummy);
+
+    stack_base = &__gc_var_stack__;
+# else
+    /* environment has been created by us by Scheme */
+    environment = env;
+# endif
+    /*
+     * In 4.x, all activities must be performed inside trampoline
+     * so we are forced to initialise GC immediately
+     * This can be postponed in 3.x but I see no point in implementing
+     * a feature which will work in older versions only.
+     * One would better use conservative GC if he needs dynamic MzScheme
+     */
+    mzscheme_init();
+#else
+    int dummy = 0;
+    stack_base = (void *)&dummy;
+#endif
+    main_loop(FALSE, FALSE);
+#if defined(MZ_PRECISE_GC) && MZSCHEME_VERSION_MAJOR < 400
+    /* releasing dummy */
+    MZ_GC_REG();
+    MZ_GC_UNREG();
+#endif
+    return 0;
+}
+
     static void
 startup_mzscheme(void)
 {
-    Scheme_Object *proc_make_security_guard;
-
-    scheme_set_stack_base(NULL, 1);
+#if !defined(MZ_PRECISE_GC) || MZSCHEME_VERSION_MAJOR < 400
+    scheme_set_stack_base(stack_base, 1);
+#endif
 
     MZ_REGISTER_STATIC(environment);
     MZ_REGISTER_STATIC(curout);
@@ -765,10 +865,35 @@ startup_mzscheme(void)
     MZ_REGISTER_STATIC(exn_p);
     MZ_REGISTER_STATIC(exn_message);
     MZ_REGISTER_STATIC(vim_exn);
-    MZ_REGISTER_STATIC(vim_exn_names);
-    MZ_REGISTER_STATIC(vim_exn_values);
 
+#if !defined(MZ_PRECISE_GC) || MZSCHEME_VERSION_MAJOR < 400
+    /* in newer versions of precise GC the initial env has been created */
     environment = scheme_basic_env();
+#endif
+    MZ_GC_CHECK();
+
+#ifdef INCLUDE_MZSCHEME_BASE
+    {
+	/*
+	 * versions 4.x do not provide Scheme bindings by defaults
+	 * we need to add them explicitly
+	 */
+	Scheme_Object *scheme_base_symbol = NULL;
+	MZ_GC_DECL_REG(1);
+	MZ_GC_VAR_IN_REG(0, scheme_base_symbol);
+	MZ_GC_REG();
+	/* invoke function from generated and included base.c */
+	declare_modules(environment);
+	scheme_base_symbol = scheme_intern_symbol("scheme/base");
+	MZ_GC_CHECK();
+	scheme_namespace_require(scheme_base_symbol);
+	MZ_GC_CHECK();
+	MZ_GC_UNREG();
+    }
+#endif
+    register_vim_exn();
+    /* use new environment to initialise exception handling */
+    init_exn_catching_apply();
 
     /* redirect output */
     scheme_console_output = do_output;
@@ -776,48 +901,131 @@ startup_mzscheme(void)
 
 #ifdef MZSCHEME_COLLECTS
     /* setup 'current-library-collection-paths' parameter */
-    scheme_set_param(scheme_config, MZCONFIG_COLLECTION_PATHS,
-	    scheme_make_pair(
 # if MZSCHEME_VERSION_MAJOR >= 299
-		scheme_char_string_to_path(
-		    scheme_byte_string_to_char_string(
-			scheme_make_byte_string(MZSCHEME_COLLECTS))),
+    {
+	Scheme_Object	*coll_byte_string = NULL;
+	Scheme_Object	*coll_char_string = NULL;
+	Scheme_Object	*coll_path = NULL;
+	Scheme_Object	*coll_pair = NULL;
+	Scheme_Config	*config = NULL;
+
+	MZ_GC_DECL_REG(5);
+	MZ_GC_VAR_IN_REG(0, coll_byte_string);
+	MZ_GC_VAR_IN_REG(1, coll_char_string);
+	MZ_GC_VAR_IN_REG(2, coll_path);
+	MZ_GC_VAR_IN_REG(3, coll_pair);
+	MZ_GC_VAR_IN_REG(4, config);
+	MZ_GC_REG();
+	coll_byte_string = scheme_make_byte_string(MZSCHEME_COLLECTS);
+	MZ_GC_CHECK();
+	coll_char_string = scheme_byte_string_to_char_string(coll_byte_string);
+	MZ_GC_CHECK();
+	coll_path = scheme_char_string_to_path(coll_char_string);
+	MZ_GC_CHECK();
+	coll_pair = scheme_make_pair(coll_path, scheme_null);
+	MZ_GC_CHECK();
+	config = scheme_config;
+	MZ_GC_CHECK();
+	scheme_set_param(config, MZCONFIG_COLLECTION_PATHS, coll_pair);
+	MZ_GC_CHECK();
+	MZ_GC_UNREG();
+    }
 # else
-		scheme_make_string(MZSCHEME_COLLECTS),
+    {
+	Scheme_Object	*coll_string = NULL;
+	Scheme_Object	*coll_pair = NULL;
+	Scheme_Config	*config = NULL;
+
+	MZ_GC_DECL_REG(3);
+	MZ_GC_VAR_IN_REG(0, coll_string);
+	MZ_GC_VAR_IN_REG(1, coll_pair);
+	MZ_GC_VAR_IN_REG(2, config);
+	MZ_GC_REG();
+	coll_string = scheme_make_string(MZSCHEME_COLLECTS);
+	MZ_GC_CHECK();
+	coll_pair = scheme_make_pair(coll_string, scheme_null);
+	MZ_GC_CHECK();
+	config = scheme_config;
+	MZ_GC_CHECK();
+	scheme_set_param(config, MZCONFIG_COLLECTION_PATHS, coll_pair);
+	MZ_GC_CHECK();
+	MZ_GC_UNREG();
+    }
 # endif
-		scheme_null));
 #endif
 #ifdef HAVE_SANDBOX
-    /* setup sandbox guards */
-    proc_make_security_guard = scheme_lookup_global(
-	    scheme_intern_symbol("make-security-guard"),
-	    environment);
-    if (proc_make_security_guard != NULL)
     {
-	Scheme_Object *args[3];
-	Scheme_Object *guard;
-	args[0] = scheme_get_param(scheme_config, MZCONFIG_SECURITY_GUARD);
-	args[1] = scheme_make_prim_w_arity(sandbox_file_guard,
-		"sandbox-file-guard", 3, 3);
-	args[2] = scheme_make_prim_w_arity(sandbox_network_guard,
-		"sandbox-network-guard", 4, 4);
-	guard = scheme_apply(proc_make_security_guard, 3, args);
-	scheme_set_param(scheme_config, MZCONFIG_SECURITY_GUARD, guard);
+	Scheme_Object	*make_security_guard = NULL;
+	MZ_GC_DECL_REG(1);
+	MZ_GC_VAR_IN_REG(0, make_security_guard);
+	MZ_GC_REG();
+
+#if MZSCHEME_VERSION_MAJOR < 400
+	{
+	    Scheme_Object	*make_security_guard_symbol = NULL;
+	    MZ_GC_DECL_REG(1);
+	    MZ_GC_VAR_IN_REG(0, make_security_guard_symbol);
+	    MZ_GC_REG();
+	    make_security_guard_symbol = scheme_intern_symbol("make-security-guard");
+	    MZ_GC_CHECK();
+	    make_security_guard = scheme_lookup_global(
+		    make_security_guard_symbol, environment);
+	    MZ_GC_UNREG();
+	}
+#else