hello, world

R=ken
DELTA=7  (7 added, 0 deleted, 0 changed)

Author: Brian Kernighan

src/pkg/debug/macho/testdata/hello.b

@@ -0,0 +1,7 @@
+main( ) {
+	extrn a, b, c;
+	putchar(a); putchar(b); putchar(c); putchar('!*n');
+}
+a 'hell';
+b 'o, w';
+c 'orld';