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Fix DllImport library names for case-sensitive filesystems #26415

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Merged
merged 3 commits into from
Nov 4, 2025
Merged

Fix DllImport library names for case-sensitive filesystems #26415

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a11ba73
Initial plan
Copilot Oct 27, 2025
0167fa9
Specify explicit DLL extensions in DllImport to fix case-sensitive fi…
Copilot Oct 27, 2025
d042502
Update NativeMethods.shared.cs
snnn Nov 4, 2025
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11 changes: 7 additions & 4 deletions csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -866,13 +866,14 @@ static NativeMethods()
internal class NativeLib
{
#if __ANDROID__
// define the library name required for android
// Define the library name required for Android
internal const string DllName = "libonnxruntime.so";
#elif __IOS__
// define the library name required for iOS
// Define the library name required for iOS
internal const string DllName = "__Internal";
#else
internal const string DllName = "onnxruntime";
// Note: the file name in ONNX Runtime nuget package must be onnxruntime.dll instead of onnxruntime.DLL(Windows filesystem can be case sensitive)
internal const string DllName = "onnxruntime.dll";
#endif
}

Expand Down Expand Up @@ -2951,7 +2952,9 @@ internal static class OrtExtensionsNativeMethods
#elif __IOS__
internal const string ExtensionsDllName = "__Internal";
#else
internal const string ExtensionsDllName = "ortextensions";
// For desktop platforms, explicitly specify the DLL name with extension to avoid
// issues on case-sensitive filesystems. See NativeLib.DllName for detailed explanation.
internal const string ExtensionsDllName = "ortextensions.dll";
#endif

[DllImport(ExtensionsDllName, CharSet = CharSet.Ansi,
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