From 83d0646d794654d2c5d6eb0aa5a6b8aeb208ae3b Mon Sep 17 00:00:00 2001
From: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Date: Sun, 24 May 2026 10:28:41 +0200
Subject: [PATCH] teflon/tests: make tflite stubs fail loudly with diagnostics
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Be more explicit when the stubs are used, even if that shouldn't happen
any more.

Reviewed-by: Maíra Canal <mcanal@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40269>
---
 src/gallium/targets/teflon/tflite-stub.c | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/src/gallium/targets/teflon/tflite-stub.c b/src/gallium/targets/teflon/tflite-stub.c
index f1d72f1dbfe..f6afa59bc01 100644
--- a/src/gallium/targets/teflon/tflite-stub.c
+++ b/src/gallium/targets/teflon/tflite-stub.c
@@ -1,15 +1,34 @@
 /*
  * Copyright (c) 2023-2024 Tomeu Vizoso <tomeu@tomeuvizoso.net>
  * SPDX-License-Identifier: MIT
+ *
+ * Stub implementations of TensorFlow Lite C API.
+ *
  */
 
 #include "tensorflow/lite/c/c_api.h"
 #include "tensorflow/lite/c/common.h"
 #include "tensorflow/lite/core/c/c_api.h"
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#define TFLITE_STUB_NOT_IMPLEMENTED(func_name) \
+   do { \
+      fprintf(stderr, \
+              "ERROR: TensorFlow Lite stub called: %s()\n" \
+              "       TensorFlow Lite is not properly installed.\n" \
+              "       This function has no real implementation.\n", \
+              func_name); \
+      fflush(stderr); \
+      assert(!"TensorFlow Lite stub invoked - TFLite not installed"); \
+   } while (0)
+
 void
 TfLiteInterpreterOptionsAddDelegate(TfLiteInterpreterOptions *options, TfLiteOpaqueDelegate *delegate)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
 }
 
 void
@@ -18,6 +37,7 @@ TfLiteInterpreterOptionsSetErrorReporter(
    void (*reporter)(void *user_data, const char *format, va_list args),
    void *user_data)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
 }
 
 TfLiteInterpreter *
@@ -25,24 +45,28 @@ TfLiteInterpreterCreate(
    const TfLiteModel *model,
    const TfLiteInterpreterOptions *optional_options)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return NULL;
 }
 
 TfLiteStatus
 TfLiteInterpreterAllocateTensors(TfLiteInterpreter *interpreter)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 int32_t
 TfLiteInterpreterGetInputTensorCount(const TfLiteInterpreter *interpreter)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 TfLiteTensor *
 TfLiteInterpreterGetInputTensor(const TfLiteInterpreter *interpreter, int32_t input_index)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return NULL;
 }
 
@@ -51,24 +75,28 @@ TfLiteTensorCopyFromBuffer(TfLiteTensor *tensor,
                            const void *input_data,
                            size_t input_data_size)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 TfLiteStatus
 TfLiteInterpreterInvoke(TfLiteInterpreter *interpreter)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 int32_t
 TfLiteInterpreterGetOutputTensorCount(const TfLiteInterpreter *interpreter)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 const TfLiteTensor *
 TfLiteInterpreterGetOutputTensor(const TfLiteInterpreter *interpreter, int32_t output_index)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return NULL;
 }
 
@@ -77,28 +105,33 @@ TfLiteTensorCopyToBuffer(const TfLiteTensor *tensor,
                          void *output_data,
                          size_t output_data_size)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return 0;
 }
 
 void
 TfLiteInterpreterDelete(TfLiteInterpreter *interpreter)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
 }
 
 void
 TfLiteInterpreterOptionsDelete(TfLiteInterpreterOptions *options)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
 }
 
 TfLiteModel *
 TfLiteModelCreate(const void *model_data, size_t model_size)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return NULL;
 }
 
 void
 TfLiteModelDelete(TfLiteModel *model)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
 }
 
 /* FIXME: Why do we need to redeclare the prototype for this one here? */
@@ -107,5 +140,6 @@ TfLiteInterpreterOptions *TfLiteInterpreterOptionsCreate(void);
 TfLiteInterpreterOptions *
 TfLiteInterpreterOptionsCreate(void)
 {
+   TFLITE_STUB_NOT_IMPLEMENTED(__func__);
    return NULL;
 }