8 files changed, 22 insertions, 0 deletions
diff --git a/src/stdio/ctermid.ref b/src/stdio/ctermid.ref
new file mode 100644
index 00000000..66201cc8
--- /dev/null
+++ b/src/stdio/ctermid.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/ctermid.c)
+POSIX(19xxyy)
diff --git a/src/stdio/cuserid.ref b/src/stdio/cuserid.ref
new file mode 100644
index 00000000..52d7b464
--- /dev/null
+++ b/src/stdio/cuserid.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/cuserid.c)
+XOPEN(4)
diff --git a/src/stdio/getopt.ref b/src/stdio/getopt.ref
new file mode 100644
index 00000000..636a4fef
--- /dev/null
+++ b/src/stdio/getopt.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/getopt.c)
+XOPEN(4)
diff --git a/src/stdio/optarg.ref b/src/stdio/optarg.ref
new file mode 100644
index 00000000..5df46989
--- /dev/null
+++ b/src/stdio/optarg.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/optarg.c)
+XOPEN(4)
diff --git a/src/stdio/opterr.ref b/src/stdio/opterr.ref
new file mode 100644
index 00000000..171f0a3a
--- /dev/null
+++ b/src/stdio/opterr.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/opterr.c)
+XOPEN(4)
diff --git a/src/stdio/optind.ref b/src/stdio/optind.ref
new file mode 100644
index 00000000..d9bdaa56
--- /dev/null
+++ b/src/stdio/optind.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/optind.c)
+XOPEN(4)
diff --git a/src/stdio/optopt.ref b/src/stdio/optopt.ref
new file mode 100644
index 00000000..943f960c
--- /dev/null
+++ b/src/stdio/optopt.ref
@@ -0,0 +1,3 @@
+#include <stdio.h>
+REFERENCE(unistd/optopt.c)
+XOPEN(4)
diff --git a/src/stdio/va_list.ref b/src/stdio/va_list.ref
index f1fd28ec..40656ef6 100644
--- a/src/stdio/va_list.ref
+++ b/src/stdio/va_list.ref
@@ -1,3 +1,4 @@
 #include <stdio.h>
 REFERENCE(stdarg/va_list.c)
 STDC(1)
+NOTE: technically not in any standard C, but is present in xopen and posix