diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5324054..da6b05e 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -45,7 +45,7 @@ target_include_directories(${PROJECT_NAME}
 if(NOT MSVC)
   target_link_libraries(${PROJECT_NAME} PUBLIC
     $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
-    $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>>:rt>)
+    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>)
 endif()
 
 install(
diff --git a/src/libipc/platform/posix/condition.h b/src/libipc/platform/posix/condition.h
index d9d4280..09f22a0 100644
--- a/src/libipc/platform/posix/condition.h
+++ b/src/libipc/platform/posix/condition.h
@@ -5,12 +5,13 @@
 
 #include <pthread.h>
 
-#include "libipc/platform/get_wait_time.h"
 #include "libipc/utility/log.h"
 #include "libipc/utility/scope_guard.h"
 #include "libipc/mutex.h"
 #include "libipc/shm.h"
 
+#include "get_wait_time.h"
+
 namespace ipc {
 namespace detail {
 namespace sync {
@@ -62,7 +63,7 @@ public:
             ipc::error("fail pthread_condattr_init[%d]\n", eno);
             return false;
         }
-        IPC_UNUSED_ auto guard_cond_attr = unique_ptr(&cond_attr, ::pthread_condattr_destroy);
+        IPC_UNUSED_ auto guard_cond_attr = guard([&cond_attr] { ::pthread_condattr_destroy(&cond_attr); };
         if ((eno = ::pthread_condattr_setpshared(&cond_attr, PTHREAD_PROCESS_SHARED)) != 0) {
             ipc::error("fail pthread_condattr_setpshared[%d]\n", eno);
             return false;
diff --git a/src/libipc/platform/posix/mutex.h b/src/libipc/platform/posix/mutex.h
index 9080f58..fbe5010 100644
--- a/src/libipc/platform/posix/mutex.h
+++ b/src/libipc/platform/posix/mutex.h
@@ -9,13 +9,14 @@
 
 #include <pthread.h>
 
-#include "libipc/platform/get_wait_time.h"
 #include "libipc/platform/detail.h"
 #include "libipc/utility/log.h"
 #include "libipc/utility/scope_guard.h"
 #include "libipc/memory/resource.h"
 #include "libipc/shm.h"
 
+#include "get_wait_time.h"
+
 namespace ipc {
 namespace detail {
 namespace sync {
@@ -114,7 +115,7 @@ public:
             ipc::error("fail pthread_mutexattr_init[%d]\n", eno);
             return false;
         }
-        IPC_UNUSED_ auto guard_mutex_attr = unique_ptr(&mutex_attr, ::pthread_mutexattr_destroy);
+        IPC_UNUSED_ auto guard_mutex_attr = guard([&mutex_attr] { ::pthread_mutexattr_destroy(&mutex_attr); };
         if ((eno = ::pthread_mutexattr_setpshared(&mutex_attr, PTHREAD_PROCESS_SHARED)) != 0) {
             ipc::error("fail pthread_mutexattr_setpshared[%d]\n", eno);
             return false;