@@ -1202,10 +1202,14 @@
 	AC_SUBST(OFPROCESS_M, "OFProcess.m")
 	AC_DEFINE(OF_HAVE_PROCESSES, 1, [Whether we have processes])
 ])
 
 AC_CHECK_HEADERS_ONCE([sys/ioctl.h sys/ttycom.h])
+
+AC_CHECK_FUNC(pledge, [
+	AC_DEFINE(OF_HAVE_PLEDGE, 1, [Whether we have pledge()])
+])
 
 AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
 	AC_CHECK_HEADER(Foundation/NSObject.h, [
 		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
 		AC_SUBST(BRIDGE, "bridge")