X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Flib%2Ftarget.cpp;fp=source%2Flib%2Ftarget.cpp;h=558b3b2c107485594cb8831c40d5cdffb2c238fb;hb=d2c4cd0f5657f26150759fb8ab19dd448646eb06;hp=d1aaf73be578c3836b48cf251536a4a4d446612b;hpb=b0438fd2d85d6937b67db38c6138b0783962d8b2;p=builder.git

diff --git a/source/lib/target.cpp b/source/lib/target.cpp
index d1aaf73..558b3b2 100644
--- a/source/lib/target.cpp
+++ b/source/lib/target.cpp
@@ -1,6 +1,7 @@
 #include <msp/core/algorithm.h>
 #include <msp/fs/stat.h>
 #include <msp/fs/utils.h>
+#include <msp/strings/utils.h>
 #include "builder.h"
 #include "filetarget.h"
 #include "sourcepackage.h"
@@ -11,6 +12,8 @@
 using namespace std;
 using namespace Msp;
 
+vector<Target *> Target::prepare_stack;
+
 Target::Target(Builder &b, const string &n):
 	builder(b),
 	name(n)
@@ -118,12 +121,26 @@ void Target::prepare()
 		return;
 	if(state==PREPARING)
 	{
-		builder.get_logger().log("problems", "Dependency cycle detected at %s", name);
-		problems.push_back("Dependency cycle detected");
+		auto i = find(prepare_stack, this);
+		if(i!=prepare_stack.end())
+		{
+			string cycle;
+			for(; i!=prepare_stack.end(); ++i)
+				append(cycle, " -> ", (*i)->name);
+			append(cycle, " -> ", name);
+			builder.get_logger().log("problems", "Dependency cycle detected: %s", cycle);
+			problems.push_back(format("Dependency cycle detected: %s", cycle));
+		}
+		else
+		{
+			builder.get_logger().log("problems", "Dependency cycle detected at %s", name);
+			problems.push_back("Dependency cycle detected");
+		}
 		state = BROKEN;
 		return;
 	}
 
+	PushPrepare _push(this);
 	state = PREPARING;
 	/* Prepare existing dependencies early, because their information may be
 	needed to find other dependencies. */