Handle non-existent target, dependencies

1 files changed, 12 insertions, 3 deletions

diff --git a/build.c b/build.c
index 600ac92..085722d 100644
--- a/build.c
+++ b/build.c
@@ -1,5 +1,6 @@
 #include <ctype.h>
 #include <err.h>
+#include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -124,8 +125,11 @@ main(int argc, char *argv[])
 		dd("%s: target '%s'\n", argv[i], tgt);
 		if (stat(argv[i], &sb))
 			err(1, argv[i]);
-		if (stat(tgt, &ssb))
+		if (stat(tgt, &ssb)) {
+			if (errno == ENOENT)
+				goto build;
 			err(1, tgt);
+		}
 		if (sb.st_mtime > ssb.st_mtime) {
 			d("%s: %s is modified, building\n",
 				argv[i], argv[i]);
@@ -141,8 +145,13 @@ main(int argc, char *argv[])
 			dd("%s: depend '%s'\n",
 				argv[i], d);
 
-			if (stat(d, &sb))
-				err(1, d);
+			if (stat(d, &sb)) {
+				if (errno != ENOENT)
+					err(1, d);
+				fprintf(stderr, "%s: dependency %s does not "
+					"exist\n", argv[0], d);
+				continue;
+			}
 			free(d);
 			if (sb.st_mtime > ssb.st_mtime) {
 				d("%s: %s is modified, building\n",