cmake: Fix multi-thread support building

.github/workflows/main.yml

@@ -200,7 +200,7 @@ jobs:
     - name: MS CMake configure
       run: |
         cd build_test
-        cmake .. -DWARNING_TO_ERROR=ON -DWITH_OPENSSL=YES
+        cmake .. -DWARNING_TO_ERROR=ON -DWITH_OPENSSL=YES -DENABLE_THREAD_SAFE=OFF
     - name: MS CMake build
       run: |
         cd build_test

CMakeLists.txt

@@ -306,7 +306,13 @@ check_function_exists(memset HAVE_MEMSET)
 check_function_exists(select HAVE_SELECT)
 check_function_exists(socket HAVE_SOCKET)
 check_function_exists(strcasecmp HAVE_STRCASECMP)
+if(MINGW OR WIN32)
+  set(CMAKE_REQUIRED_LIBRARIES pthread)
+endif()
 check_function_exists(pthread_mutex_lock HAVE_PTHREAD_MUTEX_LOCK)
+if(MINGW OR WIN32)
+  set(CMAKE_REQUIRED_LIBRARIES "")
+endif()
 check_function_exists(getaddrinfo HAVE_GETADDRINFO)
 check_function_exists(strnlen HAVE_STRNLEN)
 check_function_exists(strrchr HAVE_STRRCHR)
@@ -428,22 +434,25 @@ else()
 endif()
 
 if(${ENABLE_THREAD_SAFE})
-  set(COAP_THREAD_SAFE "${ENABLE_THREAD_SAFE}")
+  set(COAP_THREAD_SAFE "1")
   message(STATUS "compiling with thread safe support")
+else()
+  set(ENABLE_THREAD_RECURSIVE_LOCK_CHECK OFF)
+  set(ENABLE_THREAD_NUM_LOGGING OFF)
 endif()
 
 if(${ENABLE_THREAD_RECURSIVE_LOCK_CHECK})
-  set(COAP_THREAD_RECURSIVE_CHECK "${ENABLE_THREAD_RECURSIVE_LOCK_CHECK}")
+  set(COAP_THREAD_RECURSIVE_CHECK "1")
   message(STATUS "compiling with thread recursive lock detection support")
 endif()
 
 if(${ENABLE_THREAD_NUM_LOGGING})
-  set(COAP_THREAD_NUM_LOGGING "${ENABLE_THREAD_NUM_LOGGING}")
+  set(COAP_THREAD_NUM_LOGGING "1")
   message(STATUS "compiling with thread number logging support")
 endif()
 
 if(${ENABLE_SMALL_STACK})
-  set(COAP_CONSTRAINED_STACK "${ENABLE_SMALL_STACK}")
+  set(COAP_CONSTRAINED_STACK "1")
   message(STATUS "compiling with small stack support")
 endif()
 
@@ -738,7 +747,8 @@ target_link_libraries(
          $<$<BOOL:${COAP_WITH_LIBMBEDTLS}>:MbedTLS::mbedtls>
          $<$<BOOL:${COAP_WITH_LIBWOLFSSL}>:wolfssl::wolfssl>
          $<$<BOOL:${WIN32}>:ws2_32>
-         $<$<BOOL:${WIN32}>:iphlpapi>)
+         $<$<BOOL:${WIN32}>:iphlpapi>
+         $<$<BOOL:${MINGW}>:pthread>)
 
 target_compile_options(
   ${COAP_LIBRARY_NAME}

cmake_coap_config.h.in

@@ -85,6 +85,9 @@
 /* Define to 1 if you have the `select' function. */
 #cmakedefine HAVE_SELECT @HAVE_SELECT@
 
+/* Define to 1 if you have the <signal.h> header file. */
+#cmakedefine HAVE_SIGNAL_H @HAVE_SIGNAL_H@
+
 /* Define to 1 if you have the `socket' function. */
 #cmakedefine HAVE_SOCKET @HAVE_SOCKET@
 

src/coap_threadsafe.c

@@ -119,7 +119,7 @@ coap_io_process_worker_thread(void *arg) {
   coap_thread_param_t *thread_param = (coap_thread_param_t *)arg;
   coap_context_t *context = thread_param->context;
 #if (COAP_MAX_LOGGING_LEVEL >= _COAP_LOG_DEBUG)
-  long unsigned int thread_pid = coap_thread_pid;
+  long unsigned int thread_pid = (long unsigned int)coap_thread_pid;
 #endif
 
   thread_no = thread_param->thread_no;