gnu: Add onnx-for-torch2.

* gnu/packages/machine-learning.scm (onnx-for-torch2): New variable.
* gnu/packages/patches/onnx-1.13.1-use-system-googletest.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Change-Id: I8a46b9a8096a33bcf949bc4f5d497e22902ab301

gnu/local.mk

@@ -1720,6 +1720,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/online-judge-tools.patch		\
   %D%/packages/patches/onnx-optimizer-system-library.patch	\
   %D%/packages/patches/onnx-use-system-googletest.patch	\
+  %D%/packages/patches/onnx-1.13.1-use-system-googletest.patch	\
   %D%/packages/patches/onnx-shared-libraries.patch	\
   %D%/packages/patches/onnx-skip-model-downloads.patch		\
   %D%/packages/patches/openbios-aarch64-riscv64-support.patch	\

gnu/packages/machine-learning.scm

@@ -1214,6 +1214,29 @@ (define args
 operators and standard data types.")
     (license license:expat)))
 
+(define-public onnx-for-torch2
+  (package
+    (inherit onnx)
+    (name "onnx")
+    (version "1.13.1")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/onnx/onnx")
+                    (commit (string-append "v" version))))
+              (sha256
+               (base32
+                "16967dbq2j40diqd0s37r19llsab8q8vbxkg1ppgy0p9fpdhfhyp"))
+              (file-name (git-file-name name version))
+              (patches (search-patches "onnx-1.13.1-use-system-googletest.patch"
+                                       "onnx-shared-libraries.patch"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  (delete-file-recursively "third_party")
+                  (substitute* "onnx/backend/test/runner/__init__.py"
+                    (("urlretrieve\\(.*") "raise unittest.SkipTest('Skipping download')\n"))))))))
+
 (define-public python-onnx
   ;; This used to be called "python-onnx" because it provided nothing but
   ;; Python bindings.  The package now provides shared libraries and C++

gnu/packages/patches/onnx-1.13.1-use-system-googletest.patch

@@ -0,0 +1,55 @@
+ONNX will build googletest from a Git checkout.  Patch CMake to use our
+googletest package and enable tests by default.
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0aa9fda2..a573170c 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -22,7 +22,7 @@ option(BUILD_ONNX_PYTHON "Build Python binaries" OFF)
+ option(ONNX_GEN_PB_TYPE_STUBS "Generate protobuf python type stubs" ON)
+ option(ONNX_WERROR "Build with Werror" OFF)
+ option(ONNX_COVERAGE "Build with coverage instrumentation" OFF)
+-option(ONNX_BUILD_TESTS "Build ONNX C++ APIs Tests" OFF)
++option(ONNX_BUILD_TESTS "Build ONNX C++ APIs Tests" ON)
+ option(ONNX_USE_LITE_PROTO "Use lite protobuf instead of full." OFF)
+ option(ONNXIFI_ENABLE_EXT "Enable onnxifi extensions." OFF)
+ if(NOT DEFINED ONNX_ML)
+@@ -82,8 +82,10 @@ if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
+ endif()
+
+ if(ONNX_BUILD_TESTS)
+-  list(APPEND CMAKE_MODULE_PATH ${ONNX_ROOT}/cmake/external)
+-  include(googletest)
++  find_package(GTest REQUIRED)
++  if(NOT GTest_FOUND)
++    message(FATAL_ERROR "cannot find googletest")
++  endif()
+ endif()
+
+ if((ONNX_USE_LITE_PROTO AND TARGET protobuf::libprotobuf-lite) OR ((NOT ONNX_USE_LITE_PROTO) AND TARGET protobuf::libprotobuf))
+diff --git a/cmake/unittest.cmake b/cmake/unittest.cmake
+index e29a93ff..ae146390 100644
+--- a/cmake/unittest.cmake
++++ b/cmake/unittest.cmake
+@@ -7,7 +7,7 @@
+ 
+ find_package(Threads)
+ 
+-set(${UT_NAME}_libs ${googletest_STATIC_LIBRARIES})
++set(${UT_NAME}_libs ${GTEST_LIBRARIES})
+ 
+ list(APPEND ${UT_NAME}_libs onnx)
+ list(APPEND ${UT_NAME}_libs onnx_proto)
+@@ -22,9 +22,9 @@
+   list(REMOVE_DUPLICATES _UT_SOURCES)
+ 
+   add_executable(${_UT_TARGET} ${_UT_SOURCES})
+-  add_dependencies(${_UT_TARGET} onnx onnx_proto googletest)
++  add_dependencies(${_UT_TARGET} onnx onnx_proto)
+ 
+   target_include_directories(${_UT_TARGET}
+-                             PUBLIC ${googletest_INCLUDE_DIRS}
++                             PUBLIC ${GTEST_INCLUDE_DIRS}
+                                     ${ONNX_INCLUDE_DIRS}
+                                     ${PROTOBUF_INCLUDE_DIRS}
+                                     ${ONNX_ROOT}