diff --git a/examples/all-clusters-app/nxp/common/main/main.cpp b/examples/all-clusters-app/nxp/common/main/main.cpp
index b2aadab98ceb8b..26772e9e600659 100644
--- a/examples/all-clusters-app/nxp/common/main/main.cpp
+++ b/examples/all-clusters-app/nxp/common/main/main.cpp
@@ -32,7 +32,7 @@ uint8_t __attribute__((section(".heap"))) ucHeap[configTOTAL_HEAP_SIZE];
 
 using namespace ::chip::DeviceLayer;
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     TaskHandle_t taskHandle;
 
diff --git a/examples/contact-sensor-app/nxp/common/main.cpp b/examples/contact-sensor-app/nxp/common/main.cpp
index d9672b5402c867..ee193927912eeb 100644
--- a/examples/contact-sensor-app/nxp/common/main.cpp
+++ b/examples/contact-sensor-app/nxp/common/main.cpp
@@ -30,7 +30,7 @@ extern "C" void main_task(void const * argument)
     chip::NXP::App::GetAppTask().Start();
 }
 #else
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     chip::DeviceLayer::PlatformMgrImpl().HardwareInit();
     chip::NXP::App::GetAppTask().Start();
diff --git a/examples/laundry-washer-app/nxp/common/main/main.cpp b/examples/laundry-washer-app/nxp/common/main/main.cpp
index b2aadab98ceb8b..26772e9e600659 100644
--- a/examples/laundry-washer-app/nxp/common/main/main.cpp
+++ b/examples/laundry-washer-app/nxp/common/main/main.cpp
@@ -32,7 +32,7 @@ uint8_t __attribute__((section(".heap"))) ucHeap[configTOTAL_HEAP_SIZE];
 
 using namespace ::chip::DeviceLayer;
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     TaskHandle_t taskHandle;
 
diff --git a/examples/light-switch-app/genio/src/main.cpp b/examples/light-switch-app/genio/src/main.cpp
index d545409c706913..564233716d1d9a 100644
--- a/examples/light-switch-app/genio/src/main.cpp
+++ b/examples/light-switch-app/genio/src/main.cpp
@@ -251,7 +251,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/lighting-app-data-mode-no-unique-id/linux/main.cpp b/examples/lighting-app-data-mode-no-unique-id/linux/main.cpp
index 8e586b5cf56d54..56cafc2e527509 100644
--- a/examples/lighting-app-data-mode-no-unique-id/linux/main.cpp
+++ b/examples/lighting-app-data-mode-no-unique-id/linux/main.cpp
@@ -95,7 +95,7 @@ void ApplicationShutdown()
     }
 }
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     if (ChipLinuxAppInit(argc, argv) != 0)
     {
diff --git a/examples/lighting-app/genio/src/main.cpp b/examples/lighting-app/genio/src/main.cpp
index 22f654eb5f2f50..2db77457d2e7b1 100644
--- a/examples/lighting-app/genio/src/main.cpp
+++ b/examples/lighting-app/genio/src/main.cpp
@@ -251,7 +251,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/lighting-app/linux/main.cpp b/examples/lighting-app/linux/main.cpp
index 8e586b5cf56d54..56cafc2e527509 100644
--- a/examples/lighting-app/linux/main.cpp
+++ b/examples/lighting-app/linux/main.cpp
@@ -95,7 +95,7 @@ void ApplicationShutdown()
     }
 }
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     if (ChipLinuxAppInit(argc, argv) != 0)
     {
diff --git a/examples/lighting-app/nxp/common/main.cpp b/examples/lighting-app/nxp/common/main.cpp
index d9672b5402c867..ee193927912eeb 100644
--- a/examples/lighting-app/nxp/common/main.cpp
+++ b/examples/lighting-app/nxp/common/main.cpp
@@ -30,7 +30,7 @@ extern "C" void main_task(void const * argument)
     chip::NXP::App::GetAppTask().Start();
 }
 #else
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     chip::DeviceLayer::PlatformMgrImpl().HardwareInit();
     chip::NXP::App::GetAppTask().Start();
diff --git a/examples/lock-app/genio/src/main.cpp b/examples/lock-app/genio/src/main.cpp
index 92b16a39663ee4..36564e13330f93 100644
--- a/examples/lock-app/genio/src/main.cpp
+++ b/examples/lock-app/genio/src/main.cpp
@@ -251,7 +251,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/lock-app/nxp/common/main/main.cpp b/examples/lock-app/nxp/common/main/main.cpp
index 09de048127518b..8565ca01af32e9 100644
--- a/examples/lock-app/nxp/common/main/main.cpp
+++ b/examples/lock-app/nxp/common/main/main.cpp
@@ -39,7 +39,7 @@ extern "C" void main_task(void const * argument)
     chip::NXP::App::GetAppTask().Start();
 }
 #else
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     chip::DeviceLayer::PlatformMgrImpl().HardwareInit();
     chip::NXP::App::GetAppTask().Start();
diff --git a/examples/ota-requestor-app/genio/src/main.cpp b/examples/ota-requestor-app/genio/src/main.cpp
index e3676c5c9eacbd..6c9f4f16c274f4 100644
--- a/examples/ota-requestor-app/genio/src/main.cpp
+++ b/examples/ota-requestor-app/genio/src/main.cpp
@@ -281,7 +281,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/platform/openiotsdk/app/openiotsdk_startup_gcc.cpp b/examples/platform/openiotsdk/app/openiotsdk_startup_gcc.cpp
index 9add2ca4e53777..88488ff64763da 100644
--- a/examples/platform/openiotsdk/app/openiotsdk_startup_gcc.cpp
+++ b/examples/platform/openiotsdk/app/openiotsdk_startup_gcc.cpp
@@ -57,7 +57,7 @@ alignas(8) static uint8_t malloc_mutex_obj[80];
 
 // C runtime import: constructor initialization and main
 extern "C" void __libc_init_array(void);
-extern "C" int main(void);
+int main(void);
 
 // IOT SDK serial declarations
 #define STDIN_FILENO 0
diff --git a/examples/shell/genio/src/main.cpp b/examples/shell/genio/src/main.cpp
index 7190fd232a0969..fb4b3e068a0d0c 100644
--- a/examples/shell/genio/src/main.cpp
+++ b/examples/shell/genio/src/main.cpp
@@ -161,7 +161,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/thermostat/genio/src/main.cpp b/examples/thermostat/genio/src/main.cpp
index d545409c706913..564233716d1d9a 100644
--- a/examples/thermostat/genio/src/main.cpp
+++ b/examples/thermostat/genio/src/main.cpp
@@ -251,7 +251,7 @@ void vStartTask(void * pvParameters)
  * Main Function
  ****************************************************************************/
 
-extern "C" int main(void)
+int main(void)
 {
     mbedtls_platform_set_calloc_free(CHIPPlatformMemoryCalloc, CHIPPlatformMemoryFree);
 
diff --git a/examples/thermostat/nxp/common/main/main.cpp b/examples/thermostat/nxp/common/main/main.cpp
index b2aadab98ceb8b..26772e9e600659 100644
--- a/examples/thermostat/nxp/common/main/main.cpp
+++ b/examples/thermostat/nxp/common/main/main.cpp
@@ -32,7 +32,7 @@ uint8_t __attribute__((section(".heap"))) ucHeap[configTOTAL_HEAP_SIZE];
 
 using namespace ::chip::DeviceLayer;
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     TaskHandle_t taskHandle;
 
diff --git a/src/lib/address_resolve/tool.cpp b/src/lib/address_resolve/tool.cpp
index 53d01b4011806f..042f7c6f891753 100644
--- a/src/lib/address_resolve/tool.cpp
+++ b/src/lib/address_resolve/tool.cpp
@@ -147,7 +147,7 @@ extern "C" void StopSignalHandler(int signal)
 
 } // namespace
 
-extern "C" int main(int argc, const char ** argv)
+int main(int argc, const char ** argv)
 {
     Platform::MemoryInit();
 
diff --git a/src/test_driver/nrfconnect/main/runner.cpp b/src/test_driver/nrfconnect/main/runner.cpp
index 44fb5bae2a6183..bd719fbd4e5b33 100644
--- a/src/test_driver/nrfconnect/main/runner.cpp
+++ b/src/test_driver/nrfconnect/main/runner.cpp
@@ -29,7 +29,7 @@ using namespace ::chip::DeviceLayer;
 
 LOG_MODULE_REGISTER(runner, CONFIG_MATTER_LOG_LEVEL);
 
-extern "C" int main(void)
+int main(void)
 {
     VerifyOrDie(settings_subsys_init() == 0);
 
diff --git a/src/tools/chip-cert/chip-cert.cpp b/src/tools/chip-cert/chip-cert.cpp
index 571a00421f2569..a06a7341fafc09 100644
--- a/src/tools/chip-cert/chip-cert.cpp
+++ b/src/tools/chip-cert/chip-cert.cpp
@@ -85,7 +85,7 @@ bool PrintVersion()
 
 } // namespace
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     bool res = false;
 
diff --git a/src/tools/spake2p/spake2p.cpp b/src/tools/spake2p/spake2p.cpp
index 45f5cc9d7c4323..ce1c0f82c60212 100644
--- a/src/tools/spake2p/spake2p.cpp
+++ b/src/tools/spake2p/spake2p.cpp
@@ -62,7 +62,7 @@ bool PrintVersion()
 
 } // namespace
 
-extern "C" int main(int argc, char * argv[])
+int main(int argc, char * argv[])
 {
     bool res = false;