updated configure.ac to capture configure command and arguments

> used the captured info in bin/main.c

lib/Makefile.in

@@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.16.2 from Makefile.am.
+# Makefile.in generated by automake 1.16.1 from Makefile.am.
 # @configure_input@
 
-# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
 
 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -244,8 +244,8 @@ am__pkginclude_HEADERS_DIST = hcl.h hcl-cmn.h hcl-fmt.h hcl-opt.h \
 	hcl-rbt.h hcl-utl.h hcl-xma.h hcl-c.h hcl-s.h hcl-tmr.h \
 	hcl-xutl.h hcl-json.h
 HEADERS = $(pkginclude_HEADERS)
-am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP) \
-	hcl-cfg.h.in
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) \
+	$(LISP)hcl-cfg.h.in
 # Read a list of newline-separated strings from the standard input,
 # and print each of them once, without duplicates.  Input order is
 # *not* preserved.

lib/hcl-cfg.h.in

@@ -291,6 +291,12 @@
 /* build release/debug */
 #undef HCL_BUILD_RELEASE
 
+/* configure arguments */
+#undef HCL_CONFIGURE_ARGS
+
+/* configure command */
+#undef HCL_CONFIGURE_CMD
+
 /* enable dynamic module capability */
 #undef HCL_ENABLE_DYNAMIC_MODULE