diff --git a/Makefile.am b/Makefile.am
index 7e3920f..fdb2bc5 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,11 +11,54 @@ else
 SUBDIRS += lib mod bin t
 endif
 
-if ENABLE_HCLGO
-SUBDIRS += go
-endif
-
 DIST_SUBDIRS = $(SUBDIRS)
 
 distclean-local:
 	@rm -rf $(top_srcdir)/autom4te.cache
+
+
+clean-local:
+	rm -rf $(builddir)/go.mod $(builddir)/go.sum
+
+if ENABLE_HCLGO
+
+## the attempt to compose a proper procedure using a regular compiler failed.
+## e.g ./configure GOC=opt/go/pkg/tool/linux_amd64/
+## while go.m4 is included in autoconf 2.71, the support for the go language
+## is very limited and the go language itself is pursuing the module based builder.
+##
+## the following is to trick autoconf/automake as if it's building go files with
+## a real compiler whereas the actual building is done thru `go build`
+
+bin_PROGRAMS = hclgo
+hclgo_SOURCES = \
+	go/hcl.go \
+	go/cb.go \
+	go/inst.go \
+	main.go \
+	go.mod
+hclgo_DEPENDENCIES = hclgo.bin
+
+## let the linker to move hclgo.bin to the actual target
+hclgo_LINK = mv -f hclgo.bin hclgo$(EXEEXT) || echo "FAILED TO LINK"
+
+hclgo.bin:
+	cp -pf $(srcdir)/go.mod $(builddir)/go.mod >/dev/null 2>&1 || true
+	chmod u+w $(builddir)/go.mod ## with `make distcheck`, the echo's redirection to the file fails without this permission change
+	sed -ri "/^[[:space:]]*replace[[:space:]]+cfg[[:space:]]*=>/d" $(builddir)/go.mod
+	echo -e "\nreplace cfg => $(abs_builddir)/go/cfg" >> $(builddir)/go.mod
+	[ -f $(srcdir)/go.sum ] && cp -pf $(srcdir)/go.sum $(builddir)/go.sum >/dev/null 2>&1 || true
+	go build -C $(srcdir) -x -o $(abs_builddir)/hclgo.bin -modfile $(abs_builddir)/go.mod
+	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod
+	rm -rf $(builddir)/go.mod $(builddir)/go.sum
+
+## the go to o recipe is fake to deceive make
+.go.o:
+	echo $< > $@
+
+.mod.o:
+	echo $< > $@
+
+endif
+
+
diff --git a/Makefile.in b/Makefile.in
index bc188c3..b710d00 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -13,6 +13,7 @@
 # PARTICULAR PURPOSE.
 
 @SET_MAKE@
+
 VPATH = @srcdir@
 am__is_gnu_make = { \
   if test -z '$(MAKELEVEL)'; then \
@@ -89,7 +90,7 @@ build_triplet = @build@
 host_triplet = @host@
 @ENABLE_STATIC_MODULE_TRUE@am__append_1 = mod lib bin t
 @ENABLE_STATIC_MODULE_FALSE@am__append_2 = lib mod bin t
-@ENABLE_HCLGO_TRUE@am__append_3 = go
+@ENABLE_HCLGO_TRUE@bin_PROGRAMS = hclgo$(EXEEXT)
 subdir = .
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_sign.m4 \
@@ -107,6 +108,15 @@ mkinstalldirs = $(install_sh) -d
 CONFIG_HEADER = $(top_builddir)/lib/hcl-cfg.h
 CONFIG_CLEAN_FILES = go/cfg/go.mod go/cfg/cfg.go
 CONFIG_CLEAN_VPATH_FILES =
+am__installdirs = "$(DESTDIR)$(bindir)"
+PROGRAMS = $(bin_PROGRAMS)
+am__hclgo_SOURCES_DIST = go/hcl.go go/cb.go go/inst.go main.go go.mod
+am__dirstamp = $(am__leading_dot)dirstamp
+@ENABLE_HCLGO_TRUE@am_hclgo_OBJECTS = go/hcl.$(OBJEXT) go/cb.$(OBJEXT) \
+@ENABLE_HCLGO_TRUE@	go/inst.$(OBJEXT) main.$(OBJEXT) \
+@ENABLE_HCLGO_TRUE@	go.$(OBJEXT)
+hclgo_OBJECTS = $(am_hclgo_OBJECTS)
+hclgo_LDADD = $(LDADD)
 AM_V_P = $(am__v_P_@AM_V@)
 am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
 am__v_P_0 = false
@@ -119,8 +129,9 @@ AM_V_at = $(am__v_at_@AM_V@)
 am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
 am__v_at_0 = @
 am__v_at_1 = 
-SOURCES =
-DIST_SOURCES =
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)/lib
+SOURCES = $(hclgo_SOURCES)
+DIST_SOURCES = $(am__hclgo_SOURCES_DIST)
 RECURSIVE_TARGETS = all-recursive check-recursive cscopelist-recursive \
 	ctags-recursive dvi-recursive html-recursive info-recursive \
 	install-data-recursive install-dvi-recursive \
@@ -351,11 +362,21 @@ top_srcdir = @top_srcdir@
 AUTOMAKE_OPTION = foreign
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = t t/test-bi.hcl
-SUBDIRS = $(am__append_1) $(am__append_2) $(am__append_3)
+SUBDIRS = $(am__append_1) $(am__append_2)
 DIST_SUBDIRS = $(SUBDIRS)
+@ENABLE_HCLGO_TRUE@hclgo_SOURCES = \
+@ENABLE_HCLGO_TRUE@	go/hcl.go \
+@ENABLE_HCLGO_TRUE@	go/cb.go \
+@ENABLE_HCLGO_TRUE@	go/inst.go \
+@ENABLE_HCLGO_TRUE@	main.go \
+@ENABLE_HCLGO_TRUE@	go.mod
+
+@ENABLE_HCLGO_TRUE@hclgo_DEPENDENCIES = hclgo.bin
+@ENABLE_HCLGO_TRUE@hclgo_LINK = mv -f hclgo.bin hclgo$(EXEEXT) || echo "FAILED TO LINK"
 all: all-recursive
 
 .SUFFIXES:
+.SUFFIXES: .go .mod .o
 am--refresh: Makefile
 	@:
 $(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
@@ -393,6 +414,75 @@ go/cfg/go.mod: $(top_builddir)/config.status $(top_srcdir)/go/cfg/go.mod.in
 	cd $(top_builddir) && $(SHELL) ./config.status $@
 go/cfg/cfg.go: $(top_builddir)/config.status $(top_srcdir)/go/cfg/cfg.go.in
 	cd $(top_builddir) && $(SHELL) ./config.status $@
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p \
+	 || test -f $$p1 \
+	  ; then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+	@list='$(bin_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+go/$(am__dirstamp):
+	@$(MKDIR_P) go
+	@: > go/$(am__dirstamp)
+go/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) go/$(DEPDIR)
+	@: > go/$(DEPDIR)/$(am__dirstamp)
+go/hcl.$(OBJEXT): go/$(am__dirstamp) go/$(DEPDIR)/$(am__dirstamp)
+go/cb.$(OBJEXT): go/$(am__dirstamp) go/$(DEPDIR)/$(am__dirstamp)
+go/inst.$(OBJEXT): go/$(am__dirstamp) go/$(DEPDIR)/$(am__dirstamp)
+
+hclgo$(EXEEXT): $(hclgo_OBJECTS) $(hclgo_DEPENDENCIES) $(EXTRA_hclgo_DEPENDENCIES) 
+	@rm -f hclgo$(EXEEXT)
+	$(AM_V_GEN)$(hclgo_LINK) $(hclgo_OBJECTS) $(hclgo_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+	-rm -f go/*.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
 
 mostlyclean-libtool:
 	-rm -f *.lo
@@ -707,9 +797,12 @@ distcleancheck: distclean
 	       exit 1; } >&2
 check-am: all-am
 check: check-recursive
-all-am: Makefile
+all-am: Makefile $(PROGRAMS)
 installdirs: installdirs-recursive
 installdirs-am:
+	for dir in "$(DESTDIR)$(bindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
 install: install-recursive
 install-exec: install-exec-recursive
 install-data: install-data-recursive
@@ -736,19 +829,22 @@ clean-generic:
 distclean-generic:
 	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
 	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-rm -f go/$(DEPDIR)/$(am__dirstamp)
+	-rm -f go/$(am__dirstamp)
 
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
 clean: clean-recursive
 
-clean-am: clean-generic clean-libtool mostlyclean-am
+clean-am: clean-binPROGRAMS clean-generic clean-libtool clean-local \
+	mostlyclean-am
 
 distclean: distclean-recursive
 	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
 	-rm -f Makefile
-distclean-am: clean-am distclean-generic distclean-libtool \
-	distclean-local distclean-tags
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-libtool distclean-local distclean-tags
 
 dvi: dvi-recursive
 
@@ -768,7 +864,7 @@ install-dvi: install-dvi-recursive
 
 install-dvi-am:
 
-install-exec-am:
+install-exec-am: install-binPROGRAMS
 
 install-html: install-html-recursive
 
@@ -798,7 +894,8 @@ maintainer-clean-am: distclean-am maintainer-clean-generic
 
 mostlyclean: mostlyclean-recursive
 
-mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
 
 pdf: pdf-recursive
 
@@ -808,26 +905,28 @@ ps: ps-recursive
 
 ps-am:
 
-uninstall-am:
+uninstall-am: uninstall-binPROGRAMS
 
 .MAKE: $(am__recursive_targets) install-am install-strip
 
 .PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
-	am--refresh check check-am clean clean-cscope clean-generic \
-	clean-libtool cscope cscopelist-am ctags ctags-am dist \
-	dist-all dist-bzip2 dist-gzip dist-lzip dist-shar dist-tarZ \
-	dist-xz dist-zip dist-zstd distcheck distclean \
+	am--refresh check check-am clean clean-binPROGRAMS \
+	clean-cscope clean-generic clean-libtool clean-local cscope \
+	cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
+	dist-gzip dist-lzip dist-shar dist-tarZ dist-xz dist-zip \
+	dist-zstd distcheck distclean distclean-compile \
 	distclean-generic distclean-libtool distclean-local \
 	distclean-tags distcleancheck distdir distuninstallcheck dvi \
 	dvi-am html html-am info info-am install install-am \
-	install-data install-data-am install-dvi install-dvi-am \
-	install-exec install-exec-am install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-ps install-ps-am install-strip \
-	installcheck installcheck-am installdirs installdirs-am \
-	maintainer-clean maintainer-clean-generic mostlyclean \
-	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
-	tags tags-am uninstall uninstall-am
+	install-binPROGRAMS install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	installdirs-am maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-binPROGRAMS
 
 .PRECIOUS: Makefile
 
@@ -835,6 +934,25 @@ uninstall-am:
 distclean-local:
 	@rm -rf $(top_srcdir)/autom4te.cache
 
+clean-local:
+	rm -rf $(builddir)/go.mod $(builddir)/go.sum
+
+@ENABLE_HCLGO_TRUE@hclgo.bin:
+@ENABLE_HCLGO_TRUE@	cp -pf $(srcdir)/go.mod $(builddir)/go.mod >/dev/null 2>&1 || true
+@ENABLE_HCLGO_TRUE@	chmod u+w $(builddir)/go.mod ## with `make distcheck`, the echo's redirection to the file fails without this permission change
+@ENABLE_HCLGO_TRUE@	sed -ri "/^[[:space:]]*replace[[:space:]]+cfg[[:space:]]*=>/d" $(builddir)/go.mod
+@ENABLE_HCLGO_TRUE@	echo -e "\nreplace cfg => $(abs_builddir)/go/cfg" >> $(builddir)/go.mod
+@ENABLE_HCLGO_TRUE@	[ -f $(srcdir)/go.sum ] && cp -pf $(srcdir)/go.sum $(builddir)/go.sum >/dev/null 2>&1 || true
+@ENABLE_HCLGO_TRUE@	go build -C $(srcdir) -x -o $(abs_builddir)/hclgo.bin -modfile $(abs_builddir)/go.mod
+@ENABLE_HCLGO_TRUE@	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod
+@ENABLE_HCLGO_TRUE@	rm -rf $(builddir)/go.mod $(builddir)/go.sum
+
+@ENABLE_HCLGO_TRUE@.go.o:
+@ENABLE_HCLGO_TRUE@	echo $< > $@
+
+@ENABLE_HCLGO_TRUE@.mod.o:
+@ENABLE_HCLGO_TRUE@	echo $< > $@
+
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
diff --git a/README.md b/README.md
index 203c826..3cd878f 100644
--- a/README.md
+++ b/README.md
@@ -5,36 +5,43 @@
 A HCL program is composed of expressions.
 
 ## Keywords
-* nil
-* true
-* false
+- nil
+- true
+- false
 
 ## Special Form Expression
-* and
-* break
-* defclass
-* defun
-* do
-* elif
-* else
-* if
-* lambda
-* or
-* return
-* set
-* until
-* while
+- and
+- break
+- defclass
+- defun
+- do
+- elif
+- else
+- if
+- lambda
+- or
+- return
+- set
+- until
+- while
 
 
-## literals
-* integer
-* character
-* small pointer
-* error
-* string
-* dictionary
-* array
-* byte array
+## Literals
+- integer
+- character
+- small pointer
+- error
+- string
+- dictionary `#{ }`
+- array `[ ]`
+- byte array `#[ ]`
+- list `#( )`
+
+## Basic Expressions
+- function calls `( )`
+- message sends `(: )`
+- variable declaration `| |`
+- class variable delcarations `::: | |`
 
 ## Builtin functions
 
@@ -79,6 +86,28 @@ A HCL program is composed of expressions.
 )
 ```
 
+## Class
+
+```
+(defclass T
+        ::: | A B C | ; class variables
+
+        (printf "initializing....\n")
+
+        (defun ::: dump()
+                (printf "%d %d %d\n" A B C)
+        )
+
+        (set A 10)
+        (set B 20)
+        (set C 30)
+
+        (printf "initialization done....\n")
+)
+
+(:T dump)
+```
+
 ## Redefining a primitive function
 
 ```
diff --git a/configure b/configure
index c28f60a..15db4ed 100755
--- a/configure
+++ b/configure
@@ -18740,7 +18740,7 @@ printf "%s\n" "#define HCL_CONFIGURE_ARGS \"$ac_configure_args\"" >>confdefs.h
 printf "%s\n" "#define HCL_CONFIGURE_CMD \"$hcl_configure_cmd\"" >>confdefs.h
 
 
-ac_config_files="$ac_config_files Makefile lib/Makefile mod/Makefile bin/Makefile go/Makefile go/cfg/go.mod go/cfg/cfg.go t/Makefile"
+ac_config_files="$ac_config_files Makefile lib/Makefile mod/Makefile bin/Makefile go/cfg/go.mod go/cfg/cfg.go t/Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -19792,7 +19792,6 @@ do
     "lib/Makefile") CONFIG_FILES="$CONFIG_FILES lib/Makefile" ;;
     "mod/Makefile") CONFIG_FILES="$CONFIG_FILES mod/Makefile" ;;
     "bin/Makefile") CONFIG_FILES="$CONFIG_FILES bin/Makefile" ;;
-    "go/Makefile") CONFIG_FILES="$CONFIG_FILES go/Makefile" ;;
     "go/cfg/go.mod") CONFIG_FILES="$CONFIG_FILES go/cfg/go.mod" ;;
     "go/cfg/cfg.go") CONFIG_FILES="$CONFIG_FILES go/cfg/cfg.go" ;;
     "t/Makefile") CONFIG_FILES="$CONFIG_FILES t/Makefile" ;;
diff --git a/configure.ac b/configure.ac
index a1e0738..97bf9fe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -690,7 +690,6 @@ AC_CONFIG_FILES([
 	lib/Makefile 
 	mod/Makefile 
 	bin/Makefile
-	go/Makefile
 	go/cfg/go.mod
 	go/cfg/cfg.go
 	t/Makefile
diff --git a/go/go.mod b/go.mod
similarity index 52%
rename from go/go.mod
rename to go.mod
index 07cf233..e154a28 100644
--- a/go/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module hcl
 
 go 1.20
 
-require cfg v0.0.0
+require cfg v0.0.0
\ No newline at end of file
diff --git a/go/Makefile.am b/go/Makefile.am
deleted file mode 100644
index 924ab1b..0000000
--- a/go/Makefile.am
+++ /dev/null
@@ -1,42 +0,0 @@
-AUTOMAKE_OPTIONS = nostdinc
-
-## the attempt to compose a proper procedure using a regular compiler failed.
-## e.g ./configure GOC=opt/go/pkg/tool/linux_amd64/
-## while go.m4 is included in autoconf 2.71, the support for the go language
-## is very limited and the go language itself is pursuing the module based builder.
-##
-## the following is to trick autoconf/automake as if it's building go files with
-## a real compiler whereas the actual building is done thru `go build`
-
-bin_PROGRAMS = hclgo
-hclgo_SOURCES = \
-	pkg/hcl.go \
-	pkg/cb.go \
-	pkg/inst.go \
-	main.go \
-	go.mod
-hclgo_DEPENDENCIES = hclgo.bin
-
-## let the linker to move hclgo.bin to the actual target
-hclgo_LINK = mv -f hclgo.bin hclgo$(EXEEXT) || echo "FAILED TO LINK"
-
-hclgo.bin:
-	cp -pf $(srcdir)/go.mod $(builddir)/go.mod >/dev/null 2>&1 || true
-	chmod u+w $(builddir)/go.mod ## with `make distcheck`, the echo's redirection to the file fails without this permission change
-	sed -ri "/^[[:space:]]*replace[[:space:]]+cfg[[:space:]]*=>/d" $(builddir)/go.mod
-	echo -e "\nreplace cfg => $(abs_builddir)/cfg" >> $(builddir)/go.mod
-	[ -f $(srcdir)/go.sum ] && cp -pf $(srcdir)/go.sum $(builddir)/go.sum >/dev/null 2>&1 || true
-	go build -C $(srcdir) -x -o $(abs_builddir)/hclgo.bin -modfile $(abs_builddir)/go.mod
-	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod
-	rm -rf $(builddir)/go.mod $(builddir)/go.sum
-
-## the go to o recipe is fake to deceive make
-.go.o:
-	echo $< > $@
-
-.mod.o:
-	echo $< > $@
-
-
-clean-local:
-	rm -rf $(builddir)/go.mod $(builddir)/go.sum
diff --git a/go/Makefile.in b/go/Makefile.in
deleted file mode 100644
index e979790..0000000
--- a/go/Makefile.in
+++ /dev/null
@@ -1,642 +0,0 @@
-# Makefile.in generated by automake 1.16.5 from Makefile.am.
-# @configure_input@
-
-# Copyright (C) 1994-2021 Free Software Foundation, Inc.
-
-# This Makefile.in is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
-# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
-# PARTICULAR PURPOSE.
-
-@SET_MAKE@
-
-VPATH = @srcdir@
-am__is_gnu_make = { \
-  if test -z '$(MAKELEVEL)'; then \
-    false; \
-  elif test -n '$(MAKE_HOST)'; then \
-    true; \
-  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
-    true; \
-  else \
-    false; \
-  fi; \
-}
-am__make_running_with_option = \
-  case $${target_option-} in \
-      ?) ;; \
-      *) echo "am__make_running_with_option: internal error: invalid" \
-              "target option '$${target_option-}' specified" >&2; \
-         exit 1;; \
-  esac; \
-  has_opt=no; \
-  sane_makeflags=$$MAKEFLAGS; \
-  if $(am__is_gnu_make); then \
-    sane_makeflags=$$MFLAGS; \
-  else \
-    case $$MAKEFLAGS in \
-      *\\[\ \	]*) \
-        bs=\\; \
-        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
-          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
-    esac; \
-  fi; \
-  skip_next=no; \
-  strip_trailopt () \
-  { \
-    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
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-	dvi-am html html-am info info-am install install-am \
-	install-binPROGRAMS install-data install-data-am install-dvi \
-	install-dvi-am install-exec install-exec-am install-html \
-	install-html-am install-info install-info-am install-man \
-	install-pdf install-pdf-am install-ps install-ps-am \
-	install-strip installcheck installcheck-am installdirs \
-	maintainer-clean maintainer-clean-generic mostlyclean \
-	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
-	pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
-	uninstall-binPROGRAMS
-
-.PRECIOUS: Makefile
-
-
-hclgo.bin:
-	cp -pf $(srcdir)/go.mod $(builddir)/go.mod >/dev/null 2>&1 || true
-	chmod u+w $(builddir)/go.mod ## with `make distcheck`, the echo's redirection to the file fails without this permission change
-	sed -ri "/^[[:space:]]*replace[[:space:]]+cfg[[:space:]]*=>/d" $(builddir)/go.mod
-	echo -e "\nreplace cfg => $(abs_builddir)/cfg" >> $(builddir)/go.mod
-	[ -f $(srcdir)/go.sum ] && cp -pf $(srcdir)/go.sum $(builddir)/go.sum >/dev/null 2>&1 || true
-	go build -C $(srcdir) -x -o $(abs_builddir)/hclgo.bin -modfile $(abs_builddir)/go.mod
-	go clean -C $(srcdir) -x -modfile $(abs_builddir)/go.mod
-	rm -rf $(builddir)/go.mod $(builddir)/go.sum
-
-.go.o:
-	echo $< > $@
-
-.mod.o:
-	echo $< > $@
-
-clean-local:
-	rm -rf $(builddir)/go.mod $(builddir)/go.sum
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
diff --git a/go/pkg/cb.go b/go/cb.go
similarity index 100%
rename from go/pkg/cb.go
rename to go/cb.go
diff --git a/go/cfg/go.mod.in b/go/cfg/go.mod.in
index c7e46e9..650b980 100644
--- a/go/cfg/go.mod.in
+++ b/go/cfg/go.mod.in
@@ -1,3 +1,6 @@
 module cfg
 
 go 1.20
+
+// this package is not supposed to be used by other parties.
+// it's intended for internal use only to work around buld issues with autotools.
diff --git a/go/hcl.go b/go/hcl.go
new file mode 100644
index 0000000..4db9b28
--- /dev/null
+++ b/go/hcl.go
@@ -0,0 +1,128 @@
+package hcl
+
+/*
+#cgo CFLAGS: -I/home/hyung-hwan/xxx/include -g -Wall
+#cgo LDFLAGS: -L/home/hyung-hwan/xxx/lib -lhcl -ldl -lquadmath
+
+#include <hcl.h>
+#include <hcl-utl.h>
+*/
+import "C"
+
+import (
+	"fmt"
+	"runtime"
+	"unsafe"
+)
+
+type HCL struct {
+	c       *C.hcl_t
+	inst_no int
+
+	io struct {
+		r IOHandle
+		w IOHandle
+	}
+}
+
+type Ext struct {
+	inst_no int
+}
+
+var inst_table InstanceTable
+
+func deregister_instance(g *HCL) {
+	if g.inst_no >= 0 {
+		inst_table.delete_instance(g.inst_no)
+		g.inst_no = -1
+	}
+}
+
+func New() (*HCL, error) {
+	var c *C.hcl_t
+	var g *HCL
+	var ext *Ext
+	var errnum C.hcl_errnum_t
+
+	c = C.hcl_openstd(C.hcl_oow_t(unsafe.Sizeof(*ext)), &errnum)
+	if c == nil {
+		var buf [64]C.hcl_uch_t
+		var ptr *C.hcl_uch_t
+		var err error
+
+		ptr = C.hcl_errnum_to_errucstr(errnum, &buf[0], C.hcl_oow_t(cap(buf)))
+		err = fmt.Errorf("%s", string(ucstr_to_rune_slice(ptr)))
+		return nil, err
+	}
+
+	ext = (*Ext)(unsafe.Pointer(C.hcl_getxtn(c)))
+
+	g = &HCL{c: c, inst_no: -1}
+
+	runtime.SetFinalizer(g, deregister_instance)
+	g.inst_no = inst_table.add_instance(c, g)
+	ext.inst_no = g.inst_no
+
+	return g, nil
+}
+
+func (hcl *HCL) Close() {
+	C.hcl_close(hcl.c)
+	deregister_instance(hcl)
+}
+
+func (hcl *HCL) Ignite(memsize uintptr) error {
+	if C.hcl_ignite(hcl.c, C.hcl_oow_t(memsize)) <= -1 {
+		return fmt.Errorf("unable to ignite: %s", string(ucstr_to_rune_slice(C.hcl_geterrstr(hcl.c))))
+	}
+
+	return nil
+}
+
+func (hcl *HCL) AddBuiltinPrims() error {
+	if C.hcl_addbuiltinprims(hcl.c) <= -1 {
+	}
+	return nil
+}
+
+func (hcl *HCL) AttachIO() error {
+	return nil
+}
+
+func (hcl *HCL) FeedString(str []rune) error {
+	return nil
+}
+
+func (hcl *HCL) BeginFeed() {
+}
+
+func (hcl *HCL) EndFeed() {
+}
+
+func (hcl *HCL) Execute() {
+}
+
+func ucstr_to_rune_slice(str *C.hcl_uch_t) []rune {
+	return uchars_to_rune_slice(str, uintptr(C.hcl_count_ucstr(str)))
+}
+
+func uchars_to_rune_slice(str *C.hcl_uch_t, len uintptr) []rune {
+	var res []rune
+	var i uintptr
+
+	// TODO: proper encoding...
+	res = make([]rune, len)
+	for i = 0; i < len; i++ {
+		res[i] = *(*rune)(unsafe.Pointer(uintptr(unsafe.Pointer(str)) + unsafe.Sizeof(*str)*i))
+	}
+	return res
+}
+
+func c_to_go(c *C.hcl_t) *HCL {
+	var ext *Ext
+	var inst Instance
+
+	ext = (*Ext)(unsafe.Pointer(C.hcl_getxtn(c)))
+	inst = inst_table.slot_to_instance(ext.inst_no)
+	return inst.g
+}
diff --git a/go/pkg/inst.go b/go/inst.go
similarity index 90%
rename from go/pkg/inst.go
rename to go/inst.go
index 817435e..8dac0ad 100644
--- a/go/pkg/inst.go
+++ b/go/inst.go
@@ -1,6 +1,9 @@
 package hcl
 
 /*
+#cgo CFLAGS: -I/home/hyung-hwan/xxx/include -g -Wall
+#cgo LDFLAGS: -L/home/hyung-hwan/xxx/lib -lhcl -ldl -lquadmath
+
 #include <hcl.h>
 */
 import "C"
diff --git a/go/pkg/hcl.go b/go/pkg/hcl.go
deleted file mode 100644
index 5a36ee0..0000000
--- a/go/pkg/hcl.go
+++ /dev/null
@@ -1,105 +0,0 @@
-package hcl
-
-/*
-#cgo CFLAGS: -I/home/hyung-hwan/xxx/include -g -Wall
-#cgo LDFLAGS: -L/home/hyung-hwan/xxx/lib -lhcl -ldl -lquadmath
-
-#include <hcl.h>
-#include <hcl-utl.h>
-*/
-import "C"
-
-import (
-	"fmt"
-	"runtime"
-//	"unsafe"
-)
-
-type HCL struct {
-	inst *C.hcl_t
-	no int
-
-	io struct {
-		r IOHandle
-		w IOHandle
-	}
-}
-
-var inst_table InstanceTable
-
-func deregister_instance(hcl *HCL) {
-	if (hcl.no >= 0) {
-		inst_table.delete_instance(hcl.no)
-		hcl.no = -1
-	}
-}
-
-func New() (*HCL, error) {
-	var inst *C.hcl_t
-	var hcl* HCL
-	inst = C.hcl_open(nil, 0, nil, nil) // TODO: prim in, errnum out
-	hcl = &HCL{inst: inst, no : -1}
-
-	runtime.SetFinalizer(hcl, deregister_instance)
-	hcl.no = inst_table.add_instance(inst, hcl)
-
-	return hcl, nil
-}
-
-func (hcl *HCL) Close() {
-	C.hcl_close (hcl.inst)
-	deregister_instance (hcl)
-}
-
-func (hcl *HCL) Ignite(memsize uintptr) error {
-	if C.hcl_ignite(hcl.inst, C.hcl_oow_t(memsize)) <= -1 {
-		// TODO: need to convert string...
-		return fmt.Errorf ("unable to ignite: %s", ucstr_to_rune_slice(C.hcl_geterrstr(hcl.inst)))
-	}
-
-	return nil
-}
-
-func (hcl *HCL) AddBuiltinPrims() error {
-	if C.hcl_addbuiltinprims(hcl.inst) <= -1 {
-	}
-	return nil
-}
-
-func (hcl *HCL) AttachIO() error {
-	return nil
-}
-
-func (hcl *HCL) FeedString(str []rune) error {
-	return nil
-}
-
-func (hcl *HCL) BeginFeed()  {
-}
-
-func (hcl *HCL) EndFeed()  {
-}
-
-func (hcl *HCL) Execute() {
-}
-
-func ucstr_to_rune_slice(str *C.hcl_uch_t) []rune {
-	return uchars_to_rune_slice(str, uintptr(C.hcl_count_ucstr(str)))
-}
-
-func uchars_to_rune_slice(str *C.hcl_uch_t, len uintptr) []rune {
-	var res []rune
-	var i uintptr
-
-	// TODO: proper encoding...
-	res = make([]rune, len)
-	for i = 0; i < len; i++ {
-//TODO		res[i] := str[i]
-	}
-	return res
-}
-
-
-func c_to_go (inst *C.hcl_t) *HCL {
-	return nil
-}
diff --git a/lib/std.c b/lib/std.c
index abf7b44..b2a97c5 100644
--- a/lib/std.c
+++ b/lib/std.c
@@ -129,6 +129,10 @@
 
 #else
 
+#	if !defined(_GNU_SOURCE)
+#		define _GNU_SOURCE
+#	endif
+
 #	include <sys/types.h>
 #	include <unistd.h>
 #	include <fcntl.h>
@@ -3691,7 +3695,7 @@ int hcl_attachiostdwithucstr (hcl_t* hcl, const hcl_uch_t* read_file, const hcl_
 	xtn->scan_path = hcl_duputobcstr(hcl, scan_file, HCL_NULL);
 	if (HCL_UNLIKELY(!xtn->scan_path)) 
 	{
-		hcl_freemem (hcl, xtn->read_path);
+		hcl_freemem (hcl, (void*)xtn->read_path);
 		xtn->read_path = HCL_NULL;
 		return -1;
 	}
@@ -3699,8 +3703,8 @@ int hcl_attachiostdwithucstr (hcl_t* hcl, const hcl_uch_t* read_file, const hcl_
 	xtn->print_path = hcl_duputobcstr(hcl, print_file, HCL_NULL);
 	if (HCL_UNLIKELY(!xtn->print_path)) 
 	{
-		hcl_freemem (hcl, xtn->scan_path);
-		hcl_freemem (hcl, xtn->read_path);
+		hcl_freemem (hcl, (void*)xtn->scan_path);
+		hcl_freemem (hcl, (void*)xtn->read_path);
 		xtn->scan_path = HCL_NULL;
 		xtn->read_path = HCL_NULL;
 		return -1;
@@ -3708,9 +3712,9 @@ int hcl_attachiostdwithucstr (hcl_t* hcl, const hcl_uch_t* read_file, const hcl_
 
 	n = hcl_attachio(hcl, read_handler, scan_handler, print_handler);
 
-	hcl_freemem (hcl, xtn->read_path);
-	hcl_freemem (hcl, xtn->scan_path);
-	hcl_freemem (hcl, xtn->print_path);
+	hcl_freemem (hcl, (void*)xtn->read_path);
+	hcl_freemem (hcl, (void*)xtn->scan_path);
+	hcl_freemem (hcl, (void*)xtn->print_path);
 
 	xtn->read_path = HCL_NULL;
 	xtn->scan_path = HCL_NULL;
diff --git a/go/main.go b/main.go
similarity index 75%
rename from go/main.go
rename to main.go
index d887f4a..920722a 100644
--- a/go/main.go
+++ b/main.go
@@ -30,9 +30,8 @@ int print_handler (hcl_t* hcl, hcl_iocmd_t cmd, void* arg)
 
 import (
 	"fmt"
-	hcl "hcl/pkg"
+	hcl "hcl/go"
 	"os"
-	"cfg"
 )
 
 /*
@@ -102,33 +101,54 @@ import (
 func main() {
 	//run_hcl()
 
+	var x *hcl.HCL = nil
+	var err error = nil
 
-/*
-	var rfh hcl.ReadFileHandler
-	var sfh hcl.ScanFileHandler
-	var pfh hcl.PrintFileHandler
-*/
-	fmt.Printf ("bindir = %s\n", cfg.BINDIR)
+	/*
+		var rfh hcl.ReadFileHandler
+		var sfh hcl.ScanFileHandler
+		var pfh hcl.PrintFileHandler
+	*/
 
-	x, err := hcl.New()
+	x, err = hcl.New()
 	if err != nil {
-		fmt.Printf("ERROR %s\n", err)
+		fmt.Printf("ERROR failed to instantiate hcl - %s\n", err.Error())
 		os.Exit(1)
 	}
-	x.Ignite(1000000)
-	x.AddBuiltinPrims()
-
-/*
-	err = x.AttachIO(&rfh, &sfh, &pfh)
+	err = x.Ignite(1000000)
 	if err != nil {
-		fmt.Printf("Error - %s", err.Error())
+		fmt.Printf("ERROR failed to ignite - %s\n", err.Error())
+		goto oops
 	}
-	x.FeedString(`(printf ">>>>>>>>> [%d]\n" (+ 30 455))
-(printf ">>>>>>>>> [%d]\n" (+ 11 455))
-#include "a.hcl"
-(printf ">>>>>>>>> [%d]\n" (+ 20 455))`)
-	x.EndFeed()
-	x.Execute()
+	err = x.AddBuiltinPrims()
+	if err != nil {
+		fmt.Printf("ERROR failed to add builtin primitives - %s\n", err.Error())
+		goto oops
+	}
+
+	/*
+	   	err = x.AttachIO(&rfh, &sfh, &pfh)
+	   	if err != nil {
+	   		fmt.Printf("Error - %s", err.Error())
+	   	}
+	   	x.FeedString(`(printf ">>>>>>>>> [%d]\n" (+ 30 455))
+
+	   (printf ">>>>>>>>> [%d]\n" (+ 11 455))
+	   #include "a.hcl"
+	   (printf ">>>>>>>>> [%d]\n" (+ 20 455))`)
+
+	   	x.EndFeed()
+	   	x.Execute()
+
+	*/
 	x.Close()
-*/
+
+	os.Exit(0)
+
+oops:
+	if x != nil {
+		x.Close()
+		x = nil
+	}
+	os.Exit(1)
 }