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-rw-r--r--make.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/make.h b/make.h
index 7b9aa31..d42720a 100644
--- a/make.h
+++ b/make.h
@@ -55,6 +55,12 @@ extern int errno;
#endif
#endif
+#ifdef butterfly
+/* The BBN Butterfly has <unistd.h> that defines _POSIX_VERSION,
+ but isn't really a POSIX.1 system. */
+#undef POSIX
+#endif
+
#if !defined (HAVE_SYS_SIGLIST) && defined (HAVE__SYS_SIGLIST)
#define sys_siglist _sys_siglist
#define HAVE_SYS_SIGLIST /* Now we have it. */