--- src/runtime/config/gen-posix-names.sh.orig	Mon Nov 27 14:24:39 2000
+++ src/runtime/config/gen-posix-names.sh	Tue Mar 11 23:09:11 2003
@@ -39,17 +39,20 @@
   echo "#include <unistd.h>" > $SRCFILE
   $CPP $SRCFILE > $INCLFILE
   rm -f $SRCFILE
-elif [ -r "/usr/include/sys/unistd.h" ]; then
-  INCLFILE=/usr/include/sys/unistd.h
-elif [ -r "/usr/include/confname.h" ]; then
-  INCLFILE=/usr/include/confname.h
-elif [ -r "/usr/include/unistd.h" ]; then
-  INCLFILE=/usr/include/unistd.h
-elif [ -r "/usr/include/bsd/unistd.h" ]; then
-  INCLFILE=/usr/include/bsd/unistd.h
 else
-  echo "gen-posix-names.sh: unable to find <unistd.h>"
-  exit 1
+  INCLFILE=""
+  for f in "/usr/include/sys/unistd.h" \
+    "/usr/include/confname.h"          \
+    "/usr/include/unistd.h"            \
+    "/usr/include/bsd/unistd.h"; do
+    if [ -r "$f" ]; then
+      INCLFILE="$INCLFILE $f"
+    fi
+  done
+  if [ -z "$INCLFILE" ]; then
+    echo "gen-posix-names.sh: unable to find <unistd.h>"
+    exit 1
+  fi
 fi
 
 echo "/* $OUTF" >> $OUTF