Fix kern/187712: config(8) does not respect KERNCONFDIR.

The impact of this bug is that you cannot build a kernel if both of the
following are true:
1) The kernel config file is in a non-default location
2) The kernel config file uses the "include" statement from config(5).

usr.sbin/config/main.c
usr.sbin/config/config.8
usr.sbin/config/config.h
usr.sbin/config/lang.l
	Added a "-I path" option to config(8).  By analogy to cc(1), it adds
	an extra path in which the "include" statement will search for
	files.

Makefile.inc1
	Pass "-I ${KERNCONFDIR}" to config(8).

PR:		kern/187712
Reviewed by:	will, imp (previous version)
MFC after:	3 weeks
Sponsored by:	Spectra Logic Corporation

1 files changed, 11 insertions, 1 deletions

diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c
index 78bb13d..86ecfa6 100644
--- a/usr.sbin/config/main.c
+++ b/usr.sbin/config/main.c
@@ -110,15 +110,25 @@ main(int argc, char **argv)
 	int ch, len;
 	char *p;
 	char *kernfile;
+	struct includepath* ipath;
 	int printmachine;
 
 	printmachine = 0;
 	kernfile = NULL;
-	while ((ch = getopt(argc, argv, "Cd:gmpVx:")) != -1)
+	SLIST_INIT(&includepath);
+	while ((ch = getopt(argc, argv, "CI:d:gmpVx:")) != -1)
 		switch (ch) {
 		case 'C':
 			filebased = 1;
 			break;
+		case 'I':
+			ipath = (struct includepath *) \
+			    	calloc(1, sizeof (struct includepath));
+			if (ipath == NULL)
+				err(EXIT_FAILURE, "calloc");
+			ipath->path = optarg;
+			SLIST_INSERT_HEAD(&includepath, ipath, path_next);
+			break;
 		case 'm':
 			printmachine = 1;
 			break;