diff --git a/racket/src/configure b/racket/src/configure
index 164fe5ca1c..e095f37686 100755
--- a/racket/src/configure
+++ b/racket/src/configure
@@ -7102,7 +7102,7 @@ makefiles="Makefile
 
 # Make sure the --enable-shared default is propagated:
 if test "${enable_shared}" = "yes" ; then
-  ac_configure_args="$ac_configure_args --enable-shared"
+  SUB_CONFIGURE_EXTRAS="$SUB_CONFIGURE_EXTRAS --enable-shared"
 fi
 
 FOREIGNTARGET=
diff --git a/racket/src/racket/configure.ac b/racket/src/racket/configure.ac
index 0fe411d03e..4d931fa553 100644
--- a/racket/src/racket/configure.ac
+++ b/racket/src/racket/configure.ac
@@ -1920,7 +1920,7 @@ makefiles="Makefile
 
 # Make sure the --enable-shared default is propagated:
 if test "${enable_shared}" = "yes" ; then
-  ac_configure_args="$ac_configure_args --enable-shared"
+  SUB_CONFIGURE_EXTRAS="$SUB_CONFIGURE_EXTRAS --enable-shared"
 fi
 
 FOREIGNTARGET=
diff --git a/racket/src/rktio/Makefile.in b/racket/src/rktio/Makefile.in
index 9c54644226..8cca47c646 100644
--- a/racket/src/rktio/Makefile.in
+++ b/racket/src/rktio/Makefile.in
@@ -5,67 +5,75 @@ CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 LDFLAGS = @LDFLAGS@
 LIBS = @LIBS@
+RKTLINKER = @RKTLINKER@
+
+NICEAR = $(srcdir)/../utils/nicear
+AR = @AR@
+ARFLAGS = @ARFLAGS@
+RANLIB = @RANLIB@
 
 RKTIO_HEADERS = $(srcdir)/rktio.h $(srcdir)/rktio_private.h rktio_config.h
 
-OBJS = rktio_fs.o \
-       rktio_fd.o \
-       rktio_file.o \
-       rktio_poll_set.o \
-       rktio_ltps.o \
-       rktio_network.o \
-       rktio_process.o \
-       rktio_envvars.o \
-       rktio_fs_change.o \
-       rktio_error.o \
-       rktio_main.o
+OBJS = rktio_fs.@LTO@ \
+       rktio_fd.@LTO@ \
+       rktio_file.@LTO@ \
+       rktio_poll_set.@LTO@ \
+       rktio_ltps.@LTO@ \
+       rktio_network.@LTO@ \
+       rktio_process.@LTO@ \
+       rktio_envvars.@LTO@ \
+       rktio_fs_change.@LTO@ \
+       rktio_error.@LTO@ \
+       rktio_main.@LTO@
 
-all: $(OBJS)
+librktio.@LIBSFX@: $(OBJS)
+	$(NICEAR) $(AR) $(ARFLAGS) librktio.@LIBSFX@ $(OBJS)
+	$(RANLIB) librktio.@LIBSFX@
 
 demo: rktio_demo
 	./rktio_demo
 
-rktio_demo: $(OBJS) demo.o demo_fifo
-	$(CC) -o rktio_demo $(CFLAGS) $(LDFLAGS) demo.o $(OBJS) $(LIBS)
+rktio_demo: librktio.@LIBSFX@ demo.@LTO@ demo_fifo
+	$(RKTLINKER) -o rktio_demo $(CFLAGS) $(LDFLAGS) demo.@LTO@ librktio.@LIBSFX@ $(LIBS)
 
 demo_fifo:
 	mkfifo demo_fifo
 
-rktio_fs.o: $(srcdir)/rktio_fs.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fs.o -c $(srcdir)/rktio_fs.c
+rktio_fs.@LTO@: $(srcdir)/rktio_fs.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fs.@LTO@ -c $(srcdir)/rktio_fs.c
 
-rktio_fd.o: $(srcdir)/rktio_fd.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fd.o -c $(srcdir)/rktio_fd.c
+rktio_fd.@LTO@: $(srcdir)/rktio_fd.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fd.@LTO@ -c $(srcdir)/rktio_fd.c
 
-rktio_file.o: $(srcdir)/rktio_file.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_file.o -c $(srcdir)/rktio_file.c
+rktio_file.@LTO@: $(srcdir)/rktio_file.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_file.@LTO@ -c $(srcdir)/rktio_file.c
 
-rktio_poll_set.o: $(srcdir)/rktio_poll_set.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_poll_set.o -c $(srcdir)/rktio_poll_set.c
+rktio_poll_set.@LTO@: $(srcdir)/rktio_poll_set.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_poll_set.@LTO@ -c $(srcdir)/rktio_poll_set.c
 
-rktio_ltps.o: $(srcdir)/rktio_ltps.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_ltps.o -c $(srcdir)/rktio_ltps.c
+rktio_ltps.@LTO@: $(srcdir)/rktio_ltps.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_ltps.@LTO@ -c $(srcdir)/rktio_ltps.c
 
-rktio_network.o: $(srcdir)/rktio_network.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_network.o -c $(srcdir)/rktio_network.c
+rktio_network.@LTO@: $(srcdir)/rktio_network.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_network.@LTO@ -c $(srcdir)/rktio_network.c
 
-rktio_process.o: $(srcdir)/rktio_process.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_process.o -c $(srcdir)/rktio_process.c
+rktio_process.@LTO@: $(srcdir)/rktio_process.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_process.@LTO@ -c $(srcdir)/rktio_process.c
 
-rktio_envvars.o: $(srcdir)/rktio_envvars.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_envvars.o -c $(srcdir)/rktio_envvars.c
+rktio_envvars.@LTO@: $(srcdir)/rktio_envvars.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_envvars.@LTO@ -c $(srcdir)/rktio_envvars.c
 
-rktio_fs_change.o: $(srcdir)/rktio_fs_change.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fs_change.o -c $(srcdir)/rktio_fs_change.c
+rktio_fs_change.@LTO@: $(srcdir)/rktio_fs_change.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_fs_change.@LTO@ -c $(srcdir)/rktio_fs_change.c
 
-rktio_error.o: $(srcdir)/rktio_error.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_error.o -c $(srcdir)/rktio_error.c
+rktio_error.@LTO@: $(srcdir)/rktio_error.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_error.@LTO@ -c $(srcdir)/rktio_error.c
 
-rktio_main.o: $(srcdir)/rktio_main.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_main.o -c $(srcdir)/rktio_main.c
+rktio_main.@LTO@: $(srcdir)/rktio_main.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o rktio_main.@LTO@ -c $(srcdir)/rktio_main.c
 
-demo.o: $(srcdir)/demo.c $(RKTIO_HEADERS)
-	$(CC) $(CFLAGS) -I$(srcdir) -I. -o demo.o -c $(srcdir)/demo.c
+demo.@LTO@: $(srcdir)/demo.c $(RKTIO_HEADERS)
+	$(CC) $(CFLAGS) -I$(srcdir) -I. -o demo.@LTO@ -c $(srcdir)/demo.c
 
 clean:
-	rm -f $(OBJS) rktio_demo
+	rm -f $(OBJS) librktio.@LIBSFX@ rktio_demo demo_fifo
diff --git a/racket/src/rktio/configure b/racket/src/rktio/configure
index 228b826ad4..d926a2bdfd 100755
--- a/racket/src/rktio/configure
+++ b/racket/src/rktio/configure
@@ -621,9 +621,18 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+LTA
+LTO
+LIBSFX
+STATIC_AR
+ARFLAGS
+AR
+RKTLINKER
 EGREP
 GREP
 CPP
+platform_ar_found
+RANLIB
 OBJEXT
 EXEEXT
 ac_ct_CC
@@ -684,6 +693,7 @@ SHELL'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
+enable_shared
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1302,6 +1312,12 @@ if test -n "$ac_init_help"; then
 
   cat <<\_ACEOF
 
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-shared         create shared libraries (ok, but not recommended)
+
 Some influential environment variables:
   CC          C compiler command
   CFLAGS      C compiler flags
@@ -2222,6 +2238,12 @@ test -n "$target_alias" &&
   program_prefix=${target_alias}-
 
 
+# Check whether --enable-shared was given.
+if test "${enable_shared+set}" = set; then :
+  enableval=$enable_shared;
+fi
+
+
 ###### Autoconfigure #######
 
 ac_ext=c
@@ -3014,6 +3036,146 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_RANLIB+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+$as_echo "$RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_RANLIB+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+$as_echo "$ac_ct_RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_RANLIB" = x; then
+    RANLIB=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    RANLIB=$ac_ct_RANLIB
+  fi
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+if test "$AR" = '' ; then
+  AR="${ac_tool_prefix}ar"
+  # Extract the first word of "$AR", so it can be a program name with args.
+set dummy $AR; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_platform_ar_found+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$platform_ar_found"; then
+  ac_cv_prog_platform_ar_found="$platform_ar_found" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_platform_ar_found="yes"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_prog_platform_ar_found" && ac_cv_prog_platform_ar_found="no"
+fi
+fi
+platform_ar_found=$ac_cv_prog_platform_ar_found
+if test -n "$platform_ar_found"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $platform_ar_found" >&5
+$as_echo "$platform_ar_found" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  if test "$platform_ar_found" = 'no' ; then
+    AR="ar"
+  fi
+fi
+if test "$ARFLAGS" = '' ; then
+  ARFLAGS=ruv
+fi
+
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for fmod in -lm" >&5
 $as_echo_n "checking for fmod in -lm... " >&6; }
@@ -3999,12 +4161,68 @@ $as_echo "#define RKTIO_USE_PTHREADS 1" >>confdefs.h
 
 fi
 
+############## libtool ################
+
+if test "${enable_shared}" = "yes" ; then
+  echo "Configuring libtool"
+
+  if test ! -d "../lt" ; then
+    mkdir "../lt"
+  fi
+  abssrcdir=`(cd ${srcdir}; pwd)`
+
+  if test "${LIBTOOLPROG}" = "" ; then
+    (cd ../lt; sh ${abssrcdir}/../lt/configure --enable-shared --disable-static)
+    LIBTOOLPROG=`pwd`/../lt/libtool
+  fi
+
+  if test "${need_gcc_static_libgcc}" = "yes" ; then
+    need_gcc_static_libgcc=""
+    if test "$CC" = "gcc" ; then
+      gcc_vers_three=`${CC} -v 2>&1 | grep "version 3."`
+      if test "$gcc_vers_three" = "" ; then
+        need_gcc_static_libgcc=""
+      else
+        need_gcc_static_libgcc=" -XCClinker -static-libgcc"
+      fi
+    fi
+  fi
+
+  AR="${LIBTOOLPROG} --mode=link --tag=CC $CC${need_gcc_static_libgcc}${ar_libtool_no_undefined} -release ${plt_lib_version} -rpath ${abslibdir} \$(ARLIBFLAGS) -o"
+  STATIC_AR="${LIBTOOLPROG} --mode=link --tag=CC $CC -o"
+  ARFLAGS=""
+  RANLIB=":"
+  RKTLINKER="${LIBTOOLPROG} --mode=link --tag=CC $CC${need_gcc_static_libgcc} -rpath ${abslibdir}"
+  CC="${LIBTOOLPROG} --mode=compile --tag=CC $CC"
+  LIBSFX=la
+  LTO="lo"
+  LTA="la"
+  STRIP_LIB_DEBUG=":"
+else
+  LIBSFX=a
+  ICP=cp
+  ICP_LIB=cp
+  LTO="o"
+  LTA="a"
+  RKTLINKER='$(CC)'
+  STATIC_AR="$AR"
+fi
+
 ############## final output ################
 
 
 
 
 
+
+
+
+
+
+
+
+
+
 makefiles="Makefile"
 
 ac_config_files="$ac_config_files $makefiles"
diff --git a/racket/src/rktio/configure.ac b/racket/src/rktio/configure.ac
index a2e47b1bb8..b246bbe41a 100644
--- a/racket/src/rktio/configure.ac
+++ b/racket/src/rktio/configure.ac
@@ -10,10 +10,24 @@ AC_CONFIG_HEADERS([rktio_config.h])
 AC_CONFIG_AUX_DIR(../lt)
 AC_CANONICAL_SYSTEM
 
+AC_ARG_ENABLE(shared,  [  --enable-shared         create shared libraries (ok, but not recommended)])
+
 ###### Autoconfigure #######
 
 AC_PROG_CC
 
+AC_PROG_RANLIB
+if test "$AR" = '' ; then 
+  AR="${ac_tool_prefix}ar"
+  AC_CHECK_PROG(platform_ar_found, $AR, yes, no)
+  if test "$platform_ar_found" = 'no' ; then
+    AR="ar"
+  fi
+fi
+if test "$ARFLAGS" = '' ; then 
+  ARFLAGS=ruv
+fi
+
 AC_CHECK_LIB(m, fmod)
 AC_CHECK_LIB(dl, dlopen)
 
@@ -271,11 +285,67 @@ if test "${enable_pthread}" = "yes" ; then
   AC_DEFINE(RKTIO_USE_PTHREADS, 1, [Pthread enabled])
 fi
 
+############## libtool ################
+
+if test "${enable_shared}" = "yes" ; then
+  echo "Configuring libtool"
+
+  if test ! -d "../lt" ; then
+    mkdir "../lt"
+  fi
+  abssrcdir=`(cd ${srcdir}; pwd)`
+
+  if test "${LIBTOOLPROG}" = "" ; then  
+    (cd ../lt; sh ${abssrcdir}/../lt/configure --enable-shared --disable-static)
+    LIBTOOLPROG=`pwd`/../lt/libtool
+  fi
+
+  if test "${need_gcc_static_libgcc}" = "yes" ; then
+    need_gcc_static_libgcc=""
+    if test "$CC" = "gcc" ; then 
+      gcc_vers_three=`${CC} -v 2>&1 | grep "version 3[.]"`
+      if test "$gcc_vers_three" = "" ; then
+        need_gcc_static_libgcc=""
+      else
+        need_gcc_static_libgcc=" -XCClinker -static-libgcc"
+      fi
+    fi
+  fi
+
+  AR="${LIBTOOLPROG} --mode=link --tag=CC $CC${need_gcc_static_libgcc}${ar_libtool_no_undefined} -release ${plt_lib_version} \$(ARLIBFLAGS) -o"
+  STATIC_AR="${LIBTOOLPROG} --mode=link --tag=CC $CC -o"
+  ARFLAGS=""
+  RANLIB=":"
+  RKTLINKER="${LIBTOOLPROG} --mode=link --tag=CC $CC${need_gcc_static_libgcc}"
+  CC="${LIBTOOLPROG} --mode=compile --tag=CC $CC"
+  LIBSFX=la
+  LTO="lo"
+  LTA="la"
+  STRIP_LIB_DEBUG=":"
+else
+  LIBSFX=a
+  ICP=cp
+  ICP_LIB=cp
+  LTO="o"
+  LTA="a"
+  RKTLINKER='$(CC)'
+  STATIC_AR="$AR"
+fi
+
 ############## final output ################
 
 AC_SUBST(CC)
 AC_SUBST(CFLAGS)
 AC_SUBST(LDFLAGS)
+AC_SUBST(RKTLINKER)
+AC_SUBST(AR)
+AC_SUBST(ARFLAGS)
+AC_SUBST(RANLIB)
+AC_SUBST(STATIC_AR)
+
+AC_SUBST(LIBSFX)
+AC_SUBST(LTO)
+AC_SUBST(LTA)
 
 makefiles="Makefile"