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diff --git a/hints/dynixptx.sh b/hints/dynixptx.sh
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+# Sequent Dynix/Ptx v. 4 hints
+# Created 1996/03/15 by Brad Howerter, bhower@wgc.woodward.com
+
+# Modified 1998/11/10 by Martin J. Bligh, mbligh@sequent.com
+# to incorporate work done by Kurtis D. Rader & myself.
+
+# Use Configure -Dcc=gcc to use gcc.
+
+# cc wants -G for dynamic loading
+lddlflags='-G'
+
+# Remove inet to avoid this error in Configure, which causes Configure
+# to be unable to figure out return types:
+# dynamic linker: ./ssize: can't find libinet.so,
+# link with -lsocket instead of -linet
+
+libswanted=`echo $libswanted | sed -e 's/ inet / /'`
+
+# Configure defaults to usenm='y', which doesn't work very well
+usenm='n'
+
+# removed d_vfork='define'; we can't use it any more ...
+
+case "$optimize" in
+'') optimize='-Wc,-O3 -W0,-xstring' ;;
+esac
+
+# We override d_socket because it's very hard for Configure to get it right
+# in Dynix/Ptx, for several reasons.
+# (1) the socket interface is in libsocket.so -- this wouldn't be so hard
+#     for Configure to fathom...but it gets more tangled.
+# (2) if the system has been patched there can be libsocket.so.1.FOO.BAR,
+#     the FOO.BAR being the old version of the system before the patching.
+#     Configure picks up the old broken version.
+# (3) libsocket.so points to either libsocket.so.1 (v4.2)
+#     or libsocket.so.1.1 (v4.4)  The socket call in libsocket.so.1.1
+#     (BSD socket library) is called bsd_socket(), and has a macro wrapper
+#     to hide this.
+# This information kindly provided by Martin J. Bligh of Sequent.
+# As he puts it:
+# "Sequent has unusual capabilities, taking it above and beyond
+#  the complexity of any other vendor" :-)
+#
+# Jarkko Hietaniemi November 1998
+
+case "$osvers" in
+4.[45]*) # configure doesn't find sockets, as they're in libsocket, not libc
+        d_socket='define'
+        d_oldsock='undef'
+        d_sockpair='define'
+        ;;
+4.2*) # on ptx/TCP 4.2, we can use BSD sockets, but they're not the default.
+        cppflags="$cppflags -Wc,+bsd-socket"
+        ccflags="$ccflags -Wc,+bsd-socket"
+        ldflags="$ldflags -Wc,+bsd-socket"
+        d_socket='define'
+        d_oldsock='undef'
+        d_sockpair='define'
+    ;;
+esac