Support building ASIO driver with MinGW toolchain

CMakeLists.txt

@@ -19,7 +19,6 @@ if(WIN32)
 else()
     # Linux-specific targets
     add_subdirectory(linux)
-
     # Protocol tests (Linux only - tests not needed on Windows)
     add_subdirectory(protocol/test)
-endif()
+endif()

README.md

@@ -174,12 +174,12 @@ The GUI provides live feedback on:
    ```
 
 #### 🛠️ Building the ASIO Driver
-3. Install [CMake](https://cmake.org/download/) and a supported compiler (e.g., Visual Studio).
+3. Install [CMake](https://cmake.org/download/) and a supported compiler (e.g., Visual Studio or MinGW).
 4. Open a terminal and run:
    ```powershell
    mkdir build
    cd build
-   cmake .. -G "Visual Studio 17 2022" # or your version
+   cmake .. -G "Visual Studio 17 2022" # or "MingGW Makefiles"
    cmake --build . --config Release
    ```
 5. The ASIO driver DLL will be in `build/windows/asio/PWARASIO.dll`.

windows/asio/CMakeLists.txt

@@ -21,8 +21,25 @@ add_library(PWARASIO SHARED ${PWARASIO_SOURCES})
 # Set output name to PWARASIO.dll
 set_target_properties(PWARASIO PROPERTIES OUTPUT_NAME "PWARASIO")
 
-# Add the .def file for proper symbol exports
-set_target_properties(PWARASIO PROPERTIES LINK_FLAGS "/DEF:${CMAKE_CURRENT_SOURCE_DIR}/pwarASIO.def")
+if (MSVC)
+    # # Add the .def file for proper symbol exports
+    set_target_properties(PWARASIO PROPERTIES LINK_FLAGS "/DEF:${CMAKE_CURRENT_SOURCE_DIR}/pwarASIO.def")
+else()
+    set_target_properties(PWARASIO PROPERTIES
+        PREFIX ""                       
+        OUTPUT_NAME "pwarASIO"          
+        WINDOWS_EXPORT_ALL_SYMBOLS FALSE
+    )
+
+    # explicit exports
+    set_property(TARGET PWARASIO PROPERTY
+        LINK_FLAGS "-Wl,--export-all-symbols -Wl,--add-stdcall-alias"
+    )
+
+    target_sources(PWARASIO PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/pwarASIO.rc)
+
+    target_link_libraries(PWARASIO PRIVATE ws2_32 avrt)
+endif()
 
 target_include_directories(PWARASIO PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}
@@ -33,8 +50,3 @@ target_compile_definitions(PWARASIO PRIVATE WIN32 _WINDOWS _CRT_SECURE_NO_DEPREC
 
 target_link_libraries(PWARASIO PRIVATE odbc32 odbccp32 winmm)
 
-add_custom_command(TARGET PWARASIO POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different
-        $<TARGET_FILE:PWARASIO>
-        Z:/music_production/PWAR/
-)

windows/asio/pwarASIO.cpp

@@ -57,7 +57,7 @@ STDMETHODIMP pwarASIO::NonDelegatingQueryInterface(REFIID riid, void** ppv) {
 extern LONG RegisterAsioDriver(CLSID, char*, char*, char*, char*);
 extern LONG UnregisterAsioDriver(CLSID, char*, char*);
 
-HRESULT _stdcall DllRegisterServer() {
+extern "C"  __declspec(dllexport) HRESULT _stdcall DllRegisterServer() {
     LONG rc = RegisterAsioDriver(IID_ASIO_DRIVER, "PWARASIO.dll", "PWAR ASIO Driver", "PWAR ASIO", "Apartment");
     if (rc) {
         char errstr[128] = {0};
@@ -68,7 +68,7 @@ HRESULT _stdcall DllRegisterServer() {
     return S_OK;
 }
 
-HRESULT _stdcall DllUnregisterServer() {
+extern "C"  __declspec(dllexport) HRESULT _stdcall DllUnregisterServer() {
     LONG rc = UnregisterAsioDriver(IID_ASIO_DRIVER, "PWARASIO.dll", "PWAR ASIO Driver");
     if (rc) {
         char errstr[128] = {0};
@@ -77,7 +77,7 @@ HRESULT _stdcall DllUnregisterServer() {
         return -1;
     }
     return S_OK;
-}
+}	
 
 pwarASIO::pwarASIO(LPUNKNOWN pUnk, HRESULT* phr)
     : CUnknown("PWARASIO", pUnk, phr),

windows/asio/pwarASIO.rc

@@ -0,0 +1,12 @@
+1 VERSIONINFO
+FILEVERSION 1,0,0,0
+PRODUCTVERSION 1,0,0,0
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904E4"
+        BEGIN
+            VALUE "FileDescription", "PipeWire ASIO Relay\0"
+        END
+    END
+END