[Support] Add libinfo into the runtime build (apache#9310)

* Move libinfo into the runtime build

* put libinfo back into libtvm

* limit microtvm imports when we only have the runtime lib

* fix lint

* try conditional for micro import

CMakeLists.txt

@@ -478,15 +478,15 @@ add_library(tvm SHARED $<TARGET_OBJECTS:tvm_objs> $<TARGET_OBJECTS:tvm_runtime_o
 set_property(TARGET tvm APPEND PROPERTY LINK_OPTIONS "${TVM_NO_UNDEFINED_SYMBOLS}")
 set_property(TARGET tvm APPEND PROPERTY LINK_OPTIONS "${TVM_VISIBILITY_FLAG}")
 if(BUILD_STATIC_RUNTIME)
-  add_library(tvm_runtime STATIC $<TARGET_OBJECTS:tvm_runtime_objs>)
+  add_library(tvm_runtime STATIC $<TARGET_OBJECTS:tvm_runtime_objs> $<TARGET_OBJECTS:tvm_libinfo_objs>)
   set(NOTICE_MULTILINE
     "You have build static version of the TVM runtime library. Make "
     "sure to use --whole-archive when linking it into your project.")
   string(CONCAT NOTICE ${NOTICE_MULTILINE})
   add_custom_command(TARGET tvm_runtime POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --yellow --bold ${NOTICE})
 else()
-  add_library(tvm_runtime SHARED $<TARGET_OBJECTS:tvm_runtime_objs>)
+  add_library(tvm_runtime SHARED $<TARGET_OBJECTS:tvm_runtime_objs> $<TARGET_OBJECTS:tvm_libinfo_objs>)
   set_property(TARGET tvm_runtime APPEND PROPERTY LINK_OPTIONS "${TVM_NO_UNDEFINED_SYMBOLS}")
 endif()
 set_property(TARGET tvm_runtime APPEND PROPERTY LINK_OPTIONS "${TVM_VISIBILITY_FLAG}")

python/tvm/__init__.py

@@ -23,7 +23,8 @@
 
 # top-level alias
 # tvm._ffi
-from ._ffi.base import TVMError, __version__
+from ._ffi.base import TVMError, __version__, _RUNTIME_ONLY
+
 from ._ffi.runtime_ctypes import DataTypeCode, DataType
 from ._ffi import register_object, register_func, register_extension, get_global_func
 
@@ -68,7 +69,7 @@
 # Contrib initializers
 from .contrib import rocm as _rocm, nvcc as _nvcc, sdaccel as _sdaccel
 
-if support.libinfo().get("USE_MICRO", "OFF") == "ON":
+if not _RUNTIME_ONLY and support.libinfo().get("USE_MICRO", "OFF") == "ON":
     from . import micro
 
 # NOTE: This file should be python2 compatible so we can

python/tvm/micro/__init__.py

@@ -15,12 +15,15 @@
 # specific language governing permissions and limitations
 # under the License.
 """MicroTVM module for bare-metal backends"""
-
 from .build import autotvm_build_func
 from .build import AutoTvmModuleLoader
 from .build import get_standalone_crt_dir
 from .build import get_microtvm_template_projects
-from .model_library_format import export_model_library_format, UnsupportedInModelLibraryFormatError
+
+from .model_library_format import (
+    export_model_library_format,
+    UnsupportedInModelLibraryFormatError,
+)
 from .project import generate_project, GeneratedProject, TemplateProject
 from .session import (
     create_local_graph_executor,