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-rw-r--r--libbuild2/adhoc-rule-cxx.cxx4
1 files changed, 4 insertions, 0 deletions
diff --git a/libbuild2/adhoc-rule-cxx.cxx b/libbuild2/adhoc-rule-cxx.cxx
index ece687f..1066f0a 100644
--- a/libbuild2/adhoc-rule-cxx.cxx
+++ b/libbuild2/adhoc-rule-cxx.cxx
@@ -297,6 +297,10 @@ namespace build2
auto_thread_env penv (nullptr);
context& ctx (*t.ctx.module_context);
+ // Enter a scheduler sub-phase.
+ //
+ scheduler::phase_guard pg (ctx.sched);
+
// Mark the queue so that we don't work any tasks that may already be
// there.
//