New file.

c/src/lib/libc/creat.c

@@ -0,0 +1,11 @@
+/* creat() "system call" */
+
+/* This is needed by f2c and therefore the SPEC benchmarks.  */
+
+#include <fcntl.h>
+
+int
+creat (const char *path, mode_t mode)
+{
+  return open (path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+}

c/src/lib/libc/isatty.c

@@ -0,0 +1,17 @@
+/* isatty.c */
+
+/* Dumb implementation so programs will at least run.  */
+
+#include <sys/stat.h>
+
+int
+isatty (int fd)
+{
+  struct stat buf;
+
+  if (fstat (fd, &buf) < 0)
+    return 0;
+  if (S_ISCHR (buf.st_mode))
+    return 1;
+  return 0;
+}