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-rw-r--r--src/s/bsd4-2.h4
-rw-r--r--src/s/dgux.h4
-rw-r--r--src/s/rtu.h4
-rw-r--r--src/s/umax.h4
4 files changed, 16 insertions, 0 deletions
diff --git a/src/s/bsd4-2.h b/src/s/bsd4-2.h
index 737cdf4e8c3..79f993ac2e0 100644
--- a/src/s/bsd4-2.h
+++ b/src/s/bsd4-2.h
@@ -134,3 +134,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* We do have vfork. */
#define HAVE_VFORK
+
+/* Process groups work in the traditional BSD manner. */
+
+#define BSD_PGRPS
diff --git a/src/s/dgux.h b/src/s/dgux.h
index ee3625852ce..58221cedce5 100644
--- a/src/s/dgux.h
+++ b/src/s/dgux.h
@@ -398,3 +398,7 @@ CC=gcc
of expediency. */
#define LIB_X11_LIB -lX11
+
+/* Process groups work in the traditional BSD manner. */
+
+#define BSD_PGRPS
diff --git a/src/s/rtu.h b/src/s/rtu.h
index 590ce7e9a4f..855c79b6caa 100644
--- a/src/s/rtu.h
+++ b/src/s/rtu.h
@@ -174,3 +174,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* (Assume) we do have vfork. */
#define HAVE_VFORK
+
+/* Process groups work in the traditional BSD manner. */
+
+#define BSD_PGRPS
diff --git a/src/s/umax.h b/src/s/umax.h
index a367885f3ba..076488064ac 100644
--- a/src/s/umax.h
+++ b/src/s/umax.h
@@ -180,3 +180,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* (Assume) we do have vfork. */
#define HAVE_VFORK
+
+/* Process groups work in the traditional BSD manner. */
+
+#define BSD_PGRPS