Dead-lock detection if a task runs but doesn't become 'undirty' as a result.

1 files changed, 6 insertions, 0 deletions

diff --git a/build.cc b/build.cc
index e057a02..445979e 100644
--- a/build.cc
+++ b/build.cc
@@ -54,6 +54,12 @@ int build(const Settings& settings,
 			auto task = getNextTask(all_tasks, dirtyTasks);
 			if(task == nullptr)
 			{
+				if(processes.empty() && !dirtyTasks.empty())
+				{
+					// No running processes, yet no process to run. This is a dead-lock...
+					std::cout << "Dead-lock detected.\n";
+					return 1;
+				}
 				break;
 			}