fix(cmake/cuda): fix build at cuda `copy` env caused by b278a69e1

`copy` env vs `normal` env:
case a:`normal` env install CUDNN/TRT by package tool, eg, apt/yum, which
will put include file(cudnn.h/NvInfer.h) to /usr/include etc.

case b: self copy env after export CPATH with cudnn/trt include dir

case c: just copy libs, not export CPATH, only export
TRT_ROOT_DIR/CUDNN_ROOT_DIR

at case a and case b, BUILD system can find cudnn/trt headers, but
at case c, can not find. `FIX` it!

what`s more, recommend install CUDA env by case a and case c, NOT
recommend install by case b, which caused by CUDA SDK CPATH not
friendly to split c env, for example Android AOSP build env

GitOrigin-RevId: cb92123f9e

cmake/cudnn.cmake

@@ -7,6 +7,10 @@ if(NOT "$ENV{LIBRARY_PATH}" STREQUAL "")
     string(REPLACE ":" ";" SYSTEM_LIBRARY_PATHS $ENV{LIBRARY_PATH})
 endif()
 
+if("${CUDNN_ROOT_DIR}" STREQUAL "" AND NOT "$ENV{CUDNN_ROOT_DIR}"  STREQUAL "")
+    set(CUDNN_ROOT_DIR $ENV{CUDNN_ROOT_DIR})
+endif()
+
 if(MGE_CUDA_USE_STATIC)
     find_library(CUDNN_LIBRARY 
         NAMES libcudnn_static.a cudnn.lib

cmake/tensorrt.cmake

@@ -2,6 +2,10 @@ if(NOT "$ENV{LIBRARY_PATH}" STREQUAL "")
     string(REPLACE ":" ";" SYSTEM_LIBRARY_PATHS $ENV{LIBRARY_PATH})
 endif()
 
+if("${TRT_ROOT_DIR}" STREQUAL "" AND NOT "$ENV{TRT_ROOT_DIR}"  STREQUAL "")
+    set(TRT_ROOT_DIR $ENV{TRT_ROOT_DIR})
+endif()
+
 if(MGE_CUDA_USE_STATIC)
     find_library(TRT_LIBRARY 
         NAMES libnvinfer_static.a nvinfer.lib

dnn/src/CMakeLists.txt

@@ -134,6 +134,7 @@ add_library(megdnn EXCLUDE_FROM_ALL OBJECT ${SOURCES})
 target_link_libraries(megdnn PUBLIC opr_param_defs)
 if(MGE_WITH_CUDA)
     target_link_libraries(megdnn PRIVATE $<BUILD_INTERFACE:cutlass>)
+    target_include_directories(megdnn PRIVATE ${CUDNN_INCLUDE_DIR})
 endif()
 
 if(MGE_WITH_ROCM)

src/CMakeLists.txt

@@ -57,6 +57,9 @@ endif()
 
 add_library(megbrain OBJECT ${SOURCES})
 target_link_libraries(megbrain PUBLIC mgb_opr_param_defs)
+if(MGE_WITH_CUDA)
+    target_include_directories(megbrain PUBLIC ${TRT_INCLUDE_DIR})
+endif()
 target_include_directories(megbrain
     PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
     PRIVATE ${PROJECT_SOURCE_DIR}/third_party/midout/src