cmake: Use trace for missing link flags (fixes #6386)

This is neccessary for static libraries, since the
CMake file API does not add link flags here.

1 files changed, 15 insertions, 0 deletions

diff --git a/test cases/cmake/16 threads/subprojects/cmMod/cmMod.cpp b/test cases/cmake/16 threads/subprojects/cmMod/cmMod.cpp
new file mode 100644
index 000000000..f971eeba0
--- /dev/null
+++ b/test cases/cmake/16 threads/subprojects/cmMod/cmMod.cpp
@@ -0,0 +1,15 @@
+#include "cmMod.hpp"
+
+#include <chrono>
+#include <thread>
+
+using namespace std::chrono_literals;
+
+void CmMod::asyncIncrement() {
+  std::thread t1([this]() {
+    std::this_thread::sleep_for(100ms);
+    num += 1;
+  });
+
+  t1.join();
+}