only set RETSIGTYPE if it is not set already

diff --git a/configure.in b/configure.in
index d9011fab4e13ffeab205a01f7ed7128959bd5369..af3905971a6c23c61e1461e3b0d2701f051de0b8 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -95,7 +95,13 @@ dnl
 AC_MODE_T
 AC_UID_T
 AC_SIZE_T
-AC_RETSIGTYPE
+dnl
+dnl only set RETSIGTYPE if it is not set already
+dnl
+case "$DEFS" in
+    *"RETSIGTYPE"*)    ;;
+    *)                 AC_RETSIGTYPE;;
+esac
 dnl
 dnl Function checks
 dnl