Files
Dennis Klein b568535910 test: support an alternative runtime library dir per test
- introduce FAIRMQ_TEST_LD_LIBRARY_PATH, which prepends a directory to
  each test's environment via ctest, so the tests can run against an
  alternative runtime library (e.g. a tsan-instrumented libstdc++)
- LD_LIBRARY_PATH rather than an injected rpath: an rpath added via the
  linker flags cannot precede the rpath spack's gcc adds through its
  specs file, so the compiler's own libstdc++ would keep winning the
  runtime search order
- scoped per test on purpose: an instrumented library has unresolved
  __tsan_* symbols and must not be loaded into uninstrumented tools
  like cmake, ctest or ninja
- fail the configuration instead of silently dropping the injection on
  CMake < 3.22 (ENVIRONMENT_MODIFICATION)
- cover the example tests too; they share the instrumented runtime but
  not the locale-cache warmup (their main() is the installed public
  header). The custom-controller env block was dead before: it tested
  lsan_options, which only ever existed in the add_example() function
  scope, so the test also never received the LSan suppressions
2026-06-10 19:31:19 +02:00
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