dynamic link with clang causes boost::runtime::arg_type_mismatch

When the library(v1.85.0) dynamically linked with clang, the boost::runtime::arg_type_mismatch exception can be thrown on getting the configuration parameters.

#define BOOST_TEST_DYN_LINK
#include <boost/test/unit_test.hpp>
#include <boost/test/unit_test_parameters.hpp>

bool init_unit_test() {
  using namespace boost::unit_test;

  runtime_config::get<log_level>(runtime_config::btrt_log_level);        // OK
  runtime_config::get<output_format>(runtime_config::btrt_log_format);   // NG
  runtime_config::get<report_level>(runtime_config::btrt_report_level);  // NG
  return true;
}

int main(int argc, char* argv[], char*[]) {
  return boost::unit_test::unit_test_main(&init_unit_test, argc, argv);
}

The program was compiled with -std=c++20 and showed the error on run time.

Test setup error: boost::runtime::arg_type_mismatch: Access with invalid type for argument corresponding to parameter log_format

With gcc(13.2), there is no problem.

clang++ --version
clang version 17.0.6 (Red Hat 17.0.6-1.module_el8.10.0+3757+fc27b834)
Target: x86_64-redhat-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

This seems similar to the issue https://github.com/boostorg/test/issues/199 and confirmed fine with the library built with visibility=global.

boostorg / test

dynamic link with clang causes boost::runtime::arg_type_mismatch #430