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-rw-r--r--src/s/aix4-1.h3
-rw-r--r--src/s/ultrix4-3.h8
2 files changed, 11 insertions, 0 deletions
diff --git a/src/s/aix4-1.h b/src/s/aix4-1.h
new file mode 100644
index 00000000000..8d62582dd32
--- /dev/null
+++ b/src/s/aix4-1.h
@@ -0,0 +1,3 @@
+#define AIX4_1
+
+#include "aix4.h"
diff --git a/src/s/ultrix4-3.h b/src/s/ultrix4-3.h
new file mode 100644
index 00000000000..0ca4900ffaa
--- /dev/null
+++ b/src/s/ultrix4-3.h
@@ -0,0 +1,8 @@
+#include "bsd4-3.h"
+
+#define NEED_UNISTD_H
+#define HAVE_TERMIOS
+#define PREFER_VSUSP
+
+/* Must set the line discipline to this, to make termio work. */
+#define SET_LINE_DISCIPLINE TERMIODISC