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+Workaround: The testsuite CMake macros now generate a top-level target
+compile_test_executables in user projects that can be used to force the
+compilation of all test executables. This works around an issue with the
+ninja build system that concurrent invocation of tests
+(via <code>ctest -jN</code>) that build executables will fail when calling
+back into cmake. As a workaround it is now possible to first build all
+executables first via <code>ninja compile_test_executables</code> and then
+run tests in parallel with <code>ctest -jN</code>.
+<br>
+(Matthias Maier, 2022/11/11)
+