Add new keywords to config. The options availible in file.i386 are now:

        /*
         * filename     [ standard | optional ] [ config-dependent ]
         *      [ dev* | profiling-routine ] [ device-driver] [ no-obj ]
         *      [ compile-with "compile rule" [no-implicit-rule] ]
         *                     [ dependancy "dependancy-list"]
         */

I added

no-obj -  This entry does not create anything linkable to the kernel.
dependancy - Add additional dependancy rules to a target.
no-implicit-rule - Don't assume .c -> .o type rules.  Config is really
             dumb in this area and assumes that everything is a .c file
	     irregarless of extention.  This was the best choice really
	     since there may even be .c file that you don't want to follow
	     the standard rules.

This was all done so that the building to the aic7770 assembler and using
the aic7770 assembler in the building of the aic7770 driver could be config
dependant.  I can now have an entry like this for the driver:

aic7770                         optional        ahc     device-driver   \
        compile-with    "${CC} $> -o $@"                                \
        dependancy      "$S/gnu/misc/aic7770/aic7770.c"                 \
        no-obj no-implicit-rule
aic7770_seq.h                   optional        ahc     device-driver          \
        compile-with "${.CURDIR}/aic7770 -o $@ $S/gnu/misc/aic7770/aic7770.seq"\
        dependancy "$S/gnu/misc/aic7770/aic7770.seq aic7770"                   \
        no-obj no-implicit-rule
i386/isa/aic7770.c              optional        ahc     device-driver   \
        dependancy "aic7770_seq.h"

I also added '\' escaping to newlines so that this doesn't look as gross as
it could have.

Reviewed by: jkh

3 files changed, 84 insertions, 12 deletions

diff --git a/usr.sbin/config/config.h b/usr.sbin/config/config.h
index 012a249..ec89072 100644
--- a/usr.sbin/config/config.h
+++ b/usr.sbin/config/config.h
@@ -48,6 +48,7 @@ struct file_list {
 	u_char	f_type;			/* see below */
 	u_char	f_flags;		/* see below */
 	char	*f_special;		/* special make rule if present */
+	char	*f_depends;		/* additional dependancies */
 	char	*f_needs;
 	/*
 	 * Random values:
@@ -94,6 +95,8 @@ struct file_list {
  * Attributes (flags).
  */
 #define	CONFIGDEP	1
+#define NO_IMPLCT_RULE	2
+#define NO_OBJ		4
 
 struct	idlst {
 	char	*id;
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c
index 76c2200..804a3b8 100644
--- a/usr.sbin/config/main.c
+++ b/usr.sbin/config/main.c
@@ -198,14 +198,25 @@ get_word(fp)
 	static char line[80];
 	register int ch;
 	register char *cp;
+	int escaped_nl = 0;
 
+begin:
 	while ((ch = getc(fp)) != EOF)
 		if (ch != ' ' && ch != '\t')
 			break;
 	if (ch == EOF)
 		return ((char *)EOF);
+	if (ch == '\\'){
+		escaped_nl = 1;
+		goto begin;
+	}
 	if (ch == '\n')
-		return (NULL);
+		if (escaped_nl){
+			escaped_nl = 0;
+			goto begin;
+		}
+		else
+			return (NULL);
 	cp = line;
 	*cp++ = ch;
 	while ((ch = getc(fp)) != EOF) {
@@ -232,14 +243,25 @@ get_quoted_word(fp)
 	static char line[256];
 	register int ch;
 	register char *cp;
+	int escaped_nl = 0;
 
+begin:
 	while ((ch = getc(fp)) != EOF)
 		if (ch != ' ' && ch != '\t')
 			break;
 	if (ch == EOF)
 		return ((char *)EOF);
+	if (ch == '\\'){
+		escaped_nl = 1;
+		goto begin;
+	}
 	if (ch == '\n')
-		return (NULL);
+		if (escaped_nl){
+			escaped_nl = 0;
+			goto begin;
+		}
+		else
+			return (NULL);
 	cp = line;
 	if (ch == '"' || ch == '\'') {
 		register int quote = ch;
diff --git a/usr.sbin/config/mkmakefile.c b/usr.sbin/config/mkmakefile.c
index e76a32c..89a9486 100644
--- a/usr.sbin/config/mkmakefile.c
+++ b/usr.sbin/config/mkmakefile.c
@@ -228,9 +228,9 @@ read_files()
 	register struct device *dp;
 	struct device *save_dp;
 	register struct opt *op;
-	char *wd, *this, *needs, *special;
+	char *wd, *this, *needs, *special, *depends;
 	char fname[32];
-	int nreqs, first = 1, configdep, isdup, std, filetype;
+	int nreqs, first = 1, configdep, isdup, std, filetype, imp_rule, no_obj;
 
 	ftab = 0;
 	(void) strcpy(fname, "../../conf/files");
@@ -247,8 +247,9 @@ openit:
 next:
 	/*
 	 * filename	[ standard | optional ] [ config-dependent ]
-	 *	[ dev* | profiling-routine ] [ device-driver]
-	 *	[ compile-with "compile rule" ]
+	 *	[ dev* | profiling-routine ] [ device-driver] [ no-obj ]
+	 *	[ compile-with "compile rule" [no-implicit-rule] ] 
+	 *		       [ dependancy "dependancy-list"] 
 	 */
 	wd = get_word(fp);
 	if (wd == (char *)EOF) {
@@ -295,9 +296,12 @@ next:
 		    fname, this, tp->f_fn);
 	nreqs = 0;
 	special = 0;
+	depends = 0;
 	configdep = 0;
 	needs = 0;
 	std = 0;
+	imp_rule = 0;
+	no_obj = 0;
 	filetype = NORMAL;
 	if (eq(wd, "standard"))
 		std = 1;
@@ -313,6 +317,29 @@ nextparam:
 		configdep++;
 		goto nextparam;
 	}
+	if (eq(wd, "no-obj")) {
+		no_obj++;
+		goto nextparam;
+	}
+	if (eq(wd, "no-implicit-rule")) {
+		if (special == 0) {
+			printf("%s: alternate rule required when "
+			       "\"no-implicit-rule\" is specified.\n",
+			       fname);
+		}
+		imp_rule++;
+		goto nextparam;
+	}
+	if (eq(wd, "dependancy")) {
+		next_quoted_word(fp, wd);
+		if (wd == 0) {
+			printf("%s: %s missing compile command string.\n",
+			       fname);
+			exit(1);
+		}
+		depends = ns(wd);
+		goto nextparam;
+	}
 	if (eq(wd, "compile-with")) {
 		next_quoted_word(fp, wd);
 		if (wd == 0) {
@@ -370,6 +397,7 @@ invis:
 	tp->f_needs = needs;
 	tp->f_flags = isdup;
 	tp->f_special = special;
+	tp->f_depends = depends;
 	goto next;
 
 doneparam:
@@ -394,8 +422,13 @@ save:
 	tp->f_flags = 0;
 	if (configdep)
 		tp->f_flags |= CONFIGDEP;
+	if (imp_rule)
+		tp->f_flags |= NO_IMPLCT_RULE;
+	if (no_obj)
+		tp->f_flags |= NO_OBJ;
 	tp->f_needs = needs;
 	tp->f_special = special;
+	tp->f_depends = depends;
 	if (pf && pf->f_type == INVISIBLE)
 		pf->f_flags = 1;		/* mark as duplicate */
 	goto next;
@@ -429,7 +462,7 @@ do_objs(fp)
 	fprintf(fp, "OBJS=");
 	lpos = 6;
 	for (tp = ftab; tp != 0; tp = tp->f_next) {
-		if (tp->f_type == INVISIBLE)
+		if (tp->f_type == INVISIBLE || tp->f_flags & NO_OBJ)
 			continue;
 		sp = tail(tp->f_fn);
 		for (fl = conf_list; fl; fl = fl->f_next) {
@@ -526,12 +559,26 @@ do_rules(f)
 			continue;
 		cp = (np = ftp->f_fn) + strlen(ftp->f_fn) - 1;
 		och = *cp;
-		*cp = '\0';
-		if (och == 'o') {
-			fprintf(f, "%so:\n\t-cp $S/%so .\n\n", tail(np), np);
-			continue;
+		if (ftp->f_flags & NO_IMPLCT_RULE) {
+			if (ftp->f_depends)
+				fprintf(f, "%s: %s\n", np, ftp->f_depends );
+			else
+				fprintf(f, "%s: \n", np );
+		}
+		else {
+			*cp = '\0';
+			if (och == 'o') {
+				fprintf(f, "%so:\n\t-cp $S/%so .\n\n", 
+					tail(np), np);
+				continue;
+			}
+			if (ftp->f_depends)
+				fprintf(f, "%so: $S/%s%c %s\n", tail(np), 
+					np, och, ftp->f_depends);
+			else
+				fprintf(f, "%so: $S/%s%c\n", tail(np), 
+					np, och);
 		}
-		fprintf(f, "%so: $S/%s%c\n", tail(np), np, och);
 		tp = tail(np);
 		special = ftp->f_special;
 		if (special == 0) {