Properly register error on downstream compiler failure

- The old code was just doing `exit(1)` if glslang or `D3DCompile` failed, which is obviously unacceptable

- The new approach adds the output to the diagnostic buffer (or invokes the callback), and tracks the error count just like any other errors

1 files changed, 6 insertions, 0 deletions

diff --git a/source/slang/diagnostics.h b/source/slang/diagnostics.h
index 8834f1a6e..6957fc763 100644
--- a/source/slang/diagnostics.h
+++ b/source/slang/diagnostics.h
@@ -185,6 +185,12 @@ namespace Slang
         }
 
         void diagnoseImpl(CodePosition const& pos, DiagnosticInfo const& info, int argCount, DiagnosticArg const* const* args);
+
+        // Add a diagnostic with raw text
+        // (used when we get errors from a downstream compiler)
+        void diagnoseRaw(
+            Severity    severity,
+            char const* message);
     };
 
     namespace Diagnostics