diff -ruN config.orig/config.h config/config.h
--- config.orig/config.h	2008-11-23 05:12:47.000000000 +0800
+++ config/config.h	2009-02-21 02:09:00.000000000 +0800
@@ -81,6 +81,7 @@
 struct device {
 	int	d_done;			/* processed */
 	char	*d_name;		/* name of device (e.g. rk11) */
+	char	*section;
 #define	UNKNOWN -2	/* -2 means not set yet */
 	STAILQ_ENTRY(device) d_next;	/* Next one in list */
 };
@@ -106,6 +107,7 @@
  */
 struct cputype {
 	char	*cpu_name;
+	char	*section;
 	SLIST_ENTRY(cputype) cpu_next;
 };
 
@@ -119,6 +121,7 @@
 struct opt {
 	char	*op_name;
 	char	*op_value;
+	char	*section;
 	int	op_ownfile;	/* true = own file, false = makefile */
 	SLIST_ENTRY(opt) op_next;
 	SLIST_ENTRY(opt) op_append;
diff -ruN config.orig/config.y config/config.y
--- config.orig/config.y	2008-11-23 05:12:47.000000000 +0800
+++ config/config.y	2009-02-21 02:09:00.000000000 +0800
@@ -22,6 +22,8 @@
 %token	NOOPTION
 %token	MAKEOPTIONS
 %token	NOMAKEOPTION 
+%token	SECTION
+%token	NOSECTION
 %token	SEMICOLON
 %token	INCLUDE
 %token	FILES
@@ -29,6 +31,7 @@
 %token	<str>	ID
 %token	<val>	NUMBER
 
+%type	<str>	Sec_name
 %type	<str>	Save_id
 %type	<str>	Opt_value
 %type	<str>	Dev
@@ -91,6 +94,8 @@
 struct  files_name_head fntab;
 char	errbuf[80];
 int	maxusers;
+char	section_init[]="main";
+char	*section=section_init;
 
 #define ns(s)	strdup(s)
 int include(const char *, int);
@@ -126,6 +131,8 @@
 		;
 
 Spec:
+	Section_spec SEMICOLON
+		|
 	Device_spec SEMICOLON
 		|
 	Config_spec SEMICOLON
@@ -147,6 +154,41 @@
 	error SEMICOLON
 		;
 
+Section_spec:
+	SECTION Sec_name { section = $2; } |
+	NOSECTION Sec_name {
+		struct cputype *cp, *cp2;
+		SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) {
+			if (eq(cp->section, $2)){
+				SLIST_REMOVE(&cputype, cp, cputype, cpu_next);
+				free(cp);
+			}
+		}
+		struct opt *op, *op2;
+		SLIST_FOREACH_SAFE(op, &opt, op_next, op2){
+			if(eq(op->section, $2)){
+				SLIST_REMOVE(&opt, op, opt, op_next);
+				free(op->op_name);
+				free(op);
+			}
+		}
+		SLIST_FOREACH_SAFE(op, &mkopt, op_next, op2){
+			if(eq(op->section, $2)){
+				SLIST_REMOVE(&mkopt, op, opt, op_next);
+				free(op->op_name);
+				free(op);
+			}
+		}
+		struct device *dp, *dp2;
+		STAILQ_FOREACH_SAFE(dp, &dtab, d_next, dp2){
+			if (eq(dp->section, $2)){
+				STAILQ_REMOVE(&dtab, dp, device, d_next);
+				free(dp->d_name);
+				free(dp);
+			}
+		}
+	      }
+
 Config_spec:
 	ARCH Save_id {
 		if (machinename != NULL && !eq($2, machinename))
@@ -167,6 +209,7 @@
 		struct cputype *cp =
 		    (struct cputype *)calloc(1, sizeof (struct cputype));
 		cp->cpu_name = $2;
+		cp->section=section;
 		SLIST_INSERT_HEAD(&cputype, cp, cpu_next);
 	      } |
 	NOCPU Save_id {
@@ -249,6 +292,10 @@
 	ID { $$ = $1; }
 	;
 
+Sec_name:
+	ID { $$ = $1; }
+	;
+
 Mkopt_list:
 	Mkopt_list COMMA Mkoption
 		|
@@ -365,6 +412,7 @@
 
 	np = (struct device *) calloc(1, sizeof *np);
 	np->d_name = name;
+	np->section = section;
 	STAILQ_INSERT_TAIL(&dtab, np, d_next);
 }
 
@@ -425,6 +473,7 @@
 	op->op_name = name;
 	op->op_ownfile = 0;
 	op->op_value = value;
+	op->section = section;
 	if (op2 != NULL) {
 		while (SLIST_NEXT(op2, op_append) != NULL)
 			op2 = SLIST_NEXT(op2, op_append);
diff -ruN config.orig/lang.l config/lang.l
--- config.orig/lang.l	2008-11-23 05:12:47.000000000 +0800
+++ config/lang.l	2009-02-21 02:09:00.000000000 +0800
@@ -81,6 +81,8 @@
 	{ "options",	OPTIONS },
 	{ "nooption",	NOOPTION },
 	{ "nooptions",	NOOPTION },
+	{ "section",	SECTION },
+	{ "nosection",	NOSECTION },
 	{ "include",	INCLUDE },
 	{ "files", 	FILES },
 	{ 0, 0 },