Add struct version to DownstreamCompiler::CompileOptions interface (#2692)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Add versioning to CompileOptions for DownstreamCompiler so we can add new options without breaking binary interface.

* Use builtin offset of directly.

1 files changed, 9 insertions, 1 deletions

diff --git a/source/compiler-core/slang-dxc-compiler.cpp b/source/compiler-core/slang-dxc-compiler.cpp
index 80b1f7a21..9df2a4f3f 100644
--- a/source/compiler-core/slang-dxc-compiler.cpp
+++ b/source/compiler-core/slang-dxc-compiler.cpp
@@ -356,8 +356,16 @@ static SlangResult _handleOperationResult(IDxcOperationResult* dxcResult, IArtif
     return SLANG_OK;
 }
 
-SlangResult DXCDownstreamCompiler::compile(const CompileOptions& options, IArtifact** outArtifact)
+SlangResult DXCDownstreamCompiler::compile(const CompileOptions& inOptions, IArtifact** outArtifact)
 {
+    if (!isVersionCompatible(inOptions)) 
+    {
+        // Not possible to compile with this version of the interface.
+        return SLANG_E_NOT_IMPLEMENTED;
+    }
+
+    CompileOptions options = getCompatibleVersion(&inOptions);
+
     // This compiler can only deal with a single artifact
     if (options.sourceArtifacts.count != 1)
     {