[c] support dynamic loading on Windows: test

Author: jll63

test/dynamic_loading/CMakeLists.txt

@@ -30,6 +30,9 @@ target_link_libraries(
 
 # Put all outputs in the same directory so Boost.DLL can locate the shared
 # libraries relative to the test executable at runtime.
+# ENABLE_EXPORTS is required so that symbols from each shared library are
+# visible to other shared libraries loaded at runtime (e.g. dl_test_overrider
+# can resolve symbols from dl_test_method/dl_test_registry).
 foreach(
     target dl_test_registry dl_test_method dl_test_overrider
            boost_openmethod-test_dynamic_loading)
@@ -38,7 +41,8 @@ foreach(
         PROPERTIES
             RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
             LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
-            ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
+            ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
+            ENABLE_EXPORTS ON)
 endforeach()
 
 add_test(