[CMake] [3/N] Remove unused code (#130322)

Some functions used by Caffe2 were removed along with some outdated checks. Follows #130006.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/130322
Approved by: https://github.com/r-barnes

CMakeLists.txt

@@ -750,7 +750,6 @@ if(NOT TORCH_BUILD_VERSION)
       CACHE STRING "Torch build version" FORCE)
 endif()
 caffe2_parse_version_str(TORCH ${TORCH_BUILD_VERSION})
-caffe2_parse_version_str(CAFFE2 ${TORCH_BUILD_VERSION})
 set(TORCH_SOVERSION "${TORCH_VERSION_MAJOR}.${TORCH_VERSION_MINOR}")
 
 # ---[ CMake scripts + modules

caffe2/CMakeLists.txt

@@ -42,10 +42,10 @@ endif()
 
 # ---[ ATen build
 if(INTERN_BUILD_ATEN_OPS)
-  set(__caffe2_CMAKE_POSITION_INDEPENDENT_CODE ${CMAKE_POSITION_INDEPENDENT_CODE})
+  set(__torch_CMAKE_POSITION_INDEPENDENT_CODE ${CMAKE_POSITION_INDEPENDENT_CODE})
   set(CMAKE_POSITION_INDEPENDENT_CODE ON)
   add_subdirectory(../aten aten)
-  set(CMAKE_POSITION_INDEPENDENT_CODE ${__caffe2_CMAKE_POSITION_INDEPENDENT_CODE})
+  set(CMAKE_POSITION_INDEPENDENT_CODE ${__torch_CMAKE_POSITION_INDEPENDENT_CODE})
 
   # Generate the headers wrapped by our operator
   file(GLOB_RECURSE torchgen_python "${PROJECT_SOURCE_DIR}/torchgen/*.py")

cmake/Dependencies.cmake

@@ -1358,9 +1358,7 @@ if(NOT INTERN_BUILD_MOBILE)
 
   # use cub in a safe manner, see:
   # https://github.com/pytorch/pytorch/pull/55292
-  if(NOT ${CUDA_VERSION} LESS 11.5)
   string(APPEND CMAKE_CUDA_FLAGS " -DCUB_WRAPPED_NAMESPACE=at_cuda_detail")
-  endif()
 
   message(STATUS "Found CUDA with FP16 support, compiling with torch.cuda.HalfTensor")
   string(APPEND CMAKE_CUDA_FLAGS " -DCUDA_HAS_FP16=1"
@@ -1430,11 +1428,6 @@ if(NOT INTERN_BUILD_MOBILE)
     add_compile_options(-mcpu=cortex-a9)
   endif()
 
-  if(WIN32 AND NOT CYGWIN)
-    set(BLAS_INSTALL_LIBRARIES "OFF"
-      CACHE BOOL "Copy the required BLAS DLLs into the TH install dirs")
-  endif()
-
   find_package(LAPACK)
   if(LAPACK_FOUND)
     set(USE_LAPACK 1)

cmake/public/utils.cmake

@@ -16,71 +16,6 @@ endforeach()
 set(${OUTPUT} ${OUT} PARENT_SCOPE)
 endfunction(prepend)
 
-
-################################################################################################
-# Clears variables from list
-# Usage:
-#   caffe_clear_vars(<variables_list>)
-macro(caffe_clear_vars)
-  foreach(_var ${ARGN})
-    unset(${_var})
-  endforeach()
-endmacro()
-
-################################################################################################
-# Prints list element per line
-# Usage:
-#   caffe_print_list(<list>)
-function(caffe_print_list)
-  foreach(e ${ARGN})
-    message(STATUS ${e})
-  endforeach()
-endfunction()
-
-################################################################################################
-# Reads set of version defines from the header file
-# Usage:
-#   caffe_parse_header(<file> <define1> <define2> <define3> ..)
-macro(caffe_parse_header FILENAME FILE_VAR)
-  set(vars_regex "")
-  set(__parnet_scope OFF)
-  set(__add_cache OFF)
-  foreach(name ${ARGN})
-    if("${name}" STREQUAL "PARENT_SCOPE")
-      set(__parnet_scope ON)
-    elseif("${name}" STREQUAL "CACHE")
-      set(__add_cache ON)
-    elseif(vars_regex)
-      set(vars_regex "${vars_regex}|${name}")
-    else()
-      set(vars_regex "${name}")
-    endif()
-  endforeach()
-  if(EXISTS "${FILENAME}")
-    file(STRINGS "${FILENAME}" ${FILE_VAR} REGEX "#define[ \t]+(${vars_regex})[ \t]+[0-9]+" )
-  else()
-    unset(${FILE_VAR})
-  endif()
-  foreach(name ${ARGN})
-    if(NOT "${name}" STREQUAL "PARENT_SCOPE" AND NOT "${name}" STREQUAL "CACHE")
-      if(${FILE_VAR})
-        if(${FILE_VAR} MATCHES ".+[ \t]${name}[ \t]+([0-9]+).*")
-          string(REGEX REPLACE ".+[ \t]${name}[ \t]+([0-9]+).*" "\\1" ${name} "${${FILE_VAR}}")
-        else()
-          set(${name} "")
-        endif()
-        if(__add_cache)
-          set(${name} ${${name}} CACHE INTERNAL "${name} parsed from ${FILENAME}" FORCE)
-        elseif(__parnet_scope)
-          set(${name} "${${name}}" PARENT_SCOPE)
-        endif()
-      else()
-        unset(${name} CACHE)
-      endif()
-    endif()
-  endforeach()
-endmacro()
-
 ################################################################################################
 # Parses a version string that might have values beyond major, minor, and patch
 # and set version variables for the library.