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tag: v4.2.2-1
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###########################################################################
#
# Library: CTK
#
# Copyright (c) Kitware Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.commontk.org/LICENSE
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
###########################################################################

function(slicerFunctionGetGccVersion path_to_gcc output_var)
  if(CMAKE_COMPILER_IS_GNUCXX)
    execute_process(
      COMMAND ${path_to_gcc} -dumpversion
      RESULT_VARIABLE result
      OUTPUT_VARIABLE output
      ERROR_VARIABLE error
      OUTPUT_STRIP_TRAILING_WHITESPACE
      ERROR_STRIP_TRAILING_WHITESPACE
      )
    if(result)
      message(FATAL_ERROR "Failed to obtain compiler version running [${path_to_gcc} -dumpversion]: ${error}")
    endif()
    set(${output_var} ${output} PARENT_SCOPE)
  endif()
endfunction()
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