text: 
  # Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
  # Spack Project Developers. See the top-level COPYRIGHT file for details.
  #
  # SPDX-License-Identifier: (Apache-2.0 OR MIT)
  
  from spack import *
  
  
  class Enzyme(CMakePackage):
      """
      The Enzyme project is a tool for performing reverse-mode automatic
      differentiation (AD) of statically-analyzable LLVM IR.
      This allows developers to use Enzyme to automatically create gradients
      of their source code without much additional work.
      """
  
      homepage = "https://enzyme.mit.edu"
      url      = "https://github.com/wsmoses/Enzyme/archive/v0.0.15.tar.gz"
      list_url = "https://github.com/wsmoses/Enzyme/releases"
      git      = "https://github.com/wsmoses/Enzyme"
  
      maintainers = ['wsmoses', 'vchuravy', 'tgymnich']
  
      root_cmakelists_dir = 'enzyme'
  
      version('main', branch='main')
      version('0.0.15',
              sha256='1ec27db0d790c4507b2256d851b256bf7e074eec933040e9e375d6e352a3c159')
      version('0.0.14',
              sha256='740641eeeeadaf47942ac88cc52e62ddc0e8c25767a501bed36ec241cf258b8d')
      version('0.0.13',
              sha256='d4a53964ec1f763772db2c56e6734269b7656c8b2ecd41fa7a41315bcd896b5a')
  
      variant(
          'build_type',
          default='Release',
          description='CMake build type',
          values=('Debug', 'Release', 'RelWithDebInfo', 'MinSizeRel')
      )
  
      depends_on('llvm@7:12')
      depends_on('cmake@3.9:', type='build')
  
      def cmake_args(self):
          spec = self.spec
          args = [
              "-DLLVM_DIR=" + spec["llvm"].prefix.lib + "/cmake/llvm"
          ]
          return args
  
      @property
      def libs(self):
          ver = self.spec['llvm'].version.up_to(1)
          libs = [
              'LLVMEnzyme-{0}'.format(ver),
              'ClangEnzyme-{0}'.format(ver)
          ]
          return find_libraries(libs, root=self.prefix, recursive=True)
  
      def setup_dependent_build_environment(self, env, dependent_spec):
          # Get the LLVMEnzyme and ClangEnzyme lib paths
          llvm, clang = self.libs
  
          if "LLVMEnzyme-" in clang:
              llvm, clang = clang, llvm
  
          env.set('LLVMENZYME', llvm)
          env.set('CLANGENZYME', clang)
  