add: unix/linux lib support; upload libs

.github/workflows/autobuild.yml

@@ -53,11 +53,17 @@ jobs:
     - name: Build
       run: cmake --build ${{ env.BUILD_PATH }} -j 4 --config ${{ env.BUILD_TYPE }}
 
-    - name: Upload artifact
+    - name: Upload artifact executable
       uses: actions/upload-artifact@v4
       with:
         name: Windows amd64 Build - MSVC
         path: ${{ env.BUILD_PATH }}/${{ env.BUILD_TYPE }}/ncmdump.exe
+    
+    - name: Upload artifact DLL
+      uses: actions/upload-artifact@v4
+      with:
+        name: Windows amd64 Build - MSVC DLL
+        path: ${{ env.BUILD_PATH }}/${{ env.BUILD_TYPE }}/libncmdump.dll
   
   build_on_linux:
     runs-on: ubuntu-latest

src/lib/libncmdump.cpp

@@ -1,6 +1,10 @@
 #include "ncmcrypt.h"
 
+#ifdef _WIN32
 #define API __declspec(dllexport)
+#else
+#define API
+#endif
 
 extern "C" {
 	API NeteaseCrypt* CreateNeteaseCrypt(const char* path) {