Add onnxruntime and etl

.agents/docs/2026-10-11-add-onnxruntime-plan.md

@@ -0,0 +1,24 @@
+# ONNX Runtime 1.31.0 compat package
+
+- Branch: `add-onnxruntime`.
+- Source: [microsoft/onnxruntime](https://github.com/microsoft/onnxruntime),
+  release `v1.31.0`, MIT licensed.
+- Shape: Form B with an external CMake build hook. ONNX Runtime cannot be
+  represented by a source glob: the upstream build generates protobuf and
+  flatbuffers sources and fetches its pinned dependency graph from
+  `cmake/external/deps.txt`.
+- Build profile: CPU execution provider only. CUDA, TensorRT, OpenVINO,
+  CoreML, DNNL, XNNPACK, mimalloc, language bindings, tests, and optional
+  provider plugins are disabled. The upstream shared library is installed
+  into the package prefix, and the mcpp descriptor links it through a small C
+  anchor target.
+- Platforms: Linux, macOS, and Windows use the same source archive and the
+  upstream CMake platform selection. `xim:cmake` is declared as the build
+  dependency on each platform.
+- Test: `tests/examples/onnxruntime` includes the installed public C API and
+  calls `OrtGetApiBase()` as a cross-platform runtime smoke test. The C API
+  header is installed at `include/onnxruntime/onnxruntime_c_api.h`.
+- CN mirror: not declared because no mcpp-res upload is available; the
+  descriptor uses the permitted upstream URL fallback. The release archive
+  SHA-256 is
+  `a7e84230b5d509e48fbd6b73c2453a56345ccb22da34a46dac1f0cb4a2d6507b`.

mcpp.toml

@@ -128,6 +128,7 @@ members = [
     "tests/examples/glm",
     "tests/examples/libaio",
     "tests/examples/libserial",
+    "tests/examples/onnxruntime",
     "tests/examples/apriltag",
     "tests/examples/libassert",
     "tests/examples/libcoro",

pkgs/c/compat.etl.lua

@@ -18,13 +18,6 @@ package = {
     repo        = "https://github.com/ETLCPP/etl",
     type        = "package",
 
-    extensions = {
-        autoupdate = {
-            tag = "${version}",
-            url = "https://github.com/ETLCPP/etl/archive/refs/tags/${tag}.tar.gz",
-        },
-    },
-
     xpm = {
         linux = {
             ["20.49.0"] = {