Index: libgo/mksigtab.sh
===================================================================
--- libgo/mksigtab.sh	(revision 250846)
+++ libgo/mksigtab.sh	(working copy)
@@ -86,6 +86,14 @@ if test "${GOOS}" = "linux"; then
 fi
 
 nsig=`grep 'const _*NSIG = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
+if test -z "$nsig"; then
+    if grep 'const _*NSIG = [ (]*_*SIGRTMAX + 1[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
+        rtmax=`grep 'const _*SIGRTMAX = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
+        if test -n "$rtmax"; then
+            nsig=`expr $rtmax + 1`
+        fi
+    fi
+fi
 i=1
 while test "$i" -lt "$nsig"; do
     if ! grep "const _SIG.* = $i" gen-sysinfo.go >/dev/null 2>&1; then