fix for win32

CMakeLists.txt

@@ -29,6 +29,10 @@ target_include_directories(${PROJECT_NAME}
   PUBLIC
   include
 )
+if(WIN32)
+  target_compile_definitions(${PROJECT_NAME}
+    PRIVATE "RCPPUTILS_BUILDING_LIBRARY")
+endif()
 ament_target_dependencies(${PROJECT_NAME} rcutils)
 ament_export_libraries(${PROJECT_NAME})
 

test/test_find_library.cpp

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <stdlib.h>
+
 #include <string>
 
 #include "gtest/gtest.h"
@@ -43,8 +45,13 @@ TEST(test_find_library, find_library)
 #else
   env_var = "LD_LIBRARY_PATH";
 #endif
+
+#ifdef _WIN32
+  EXPECT_EQ(_putenv_s(env_var, test_lib_dir), 0);
+#else
   const int override = 1;
-  setenv(env_var, test_lib_dir, override);
+  EXPECT_EQ(setenv(env_var, test_lib_dir, override), 0);
+#endif
 
   // Positive test.
   const std::string test_lib_actual = find_library_path("test_library");

test/test_library.cpp

@@ -13,7 +13,8 @@
 // limitations under the License.
 
 /// @file
-/// Trivial library to ensure we have some linking present.
+/// Trivial library to ensure we have some linking present for
+/// `test_find_library`.
 
 namespace test_library
 {