From: Richard M. Stallman <rms@gnu.org>
Date: Tue, 19 Jul 1994 16:43:47 +0000 (+0000)
Subject: [__GNUC__] (LIBX11_SYSTEM): Add -lcposix.
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[__GNUC__] (LIBX11_SYSTEM): Add -lcposix.
---

diff --git a/src/s/isc4-0.h b/src/s/isc4-0.h
index d5c390f6145..091ba3e9d52 100644
--- a/src/s/isc4-0.h
+++ b/src/s/isc4-0.h
@@ -6,3 +6,10 @@
 
 #define ISC4_0
 #define NEED_SIOCTL
+
+/* fmcphers@csugrad.cs.vt.edu reported this was necessary.
+   He used GCC.  I don't know what is needed with other compilers.  */
+#ifdef __GNUC__
+#undef LIBX11_SYSTEM
+#define LIBX11_SYSTEM -lpt -lnls -lnsl_s -lcposix -lc
+#endif