From ec4019e8f693fb68c8e282bb540812a10d99cba1 Mon Sep 17 00:00:00 2001
From: Christopher Jones <sixd@php.net>
Date: Mon, 5 Aug 2013 14:21:06 -0700
Subject: [PATCH] Add an empty make command for DTrace .d files to stop an
 implicit circular dependency in GNU Make which causes .d files to be
 overwritten (Bug 61268)

---
 acinclude.m4 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/acinclude.m4 b/acinclude.m4
index d5912ad101..1c8ca19134 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2959,8 +2959,12 @@ dnl DTrace objects
   esac
 
 dnl Generate Makefile.objects entries
+dnl The empty $ac_provsrc command stops an implicit circular dependency
+dnl in GNU Make which causes the .d file to be overwritten (Bug 61268)
   cat>>Makefile.objects<<EOF
 
+$abs_srcdir/$ac_provsrc:;
+
 $ac_bdir[$]ac_hdrobj: $abs_srcdir/$ac_provsrc
 	dtrace -h -C -s $ac_srcdir[$]ac_provsrc -o \$[]@ && \$(SED) -ibak 's,PHP_,DTRACE_,g' \$[]@
 
-- 
2.40.0