text: # Copyright 2013-2021 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 Libunwind(AutotoolsPackage):
      """A portable and efficient C programming interface (API) to determine
         the call-chain of a program."""
  
      homepage = "http://www.nongnu.org/libunwind/"
      url      = "http://download.savannah.gnu.org/releases/libunwind/libunwind-1.1.tar.gz"
      git      = "https://github.com/libunwind/libunwind"
      maintainers = ['mwkrentel']
  
      version('master', branch='master')
      version('1.5-head', branch='v1.5-stable')
      version('1.5.0', sha256='90337653d92d4a13de590781371c604f9031cdb50520366aa1e3a91e1efb1017')
      version('1.4.0', sha256='df59c931bd4d7ebfd83ee481c943edf015138089b8e50abed8d9c57ba9338435')
      version('1.3.1', sha256='43997a3939b6ccdf2f669b50fdb8a4d3205374728c2923ddc2354c65260214f8')
      version('1.2.1', sha256='3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb')
      version('1.1', sha256='9dfe0fcae2a866de9d3942c66995e4b460230446887dbdab302d41a8aee8d09a')
  
      variant('pic', default=False,
              description='Compile with position independent code.')
  
      variant('xz', default=False,
              description='Support xz (lzma) compressed symbol tables.')
  
      variant('zlib', default=False,
              description='Support zlib compressed symbol tables '
              '(1.5 and later).')
  
      # The libunwind releases contain the autotools generated files,
      # but the git repo snapshots do not.
      depends_on('autoconf', type='build', when='@master,1.5-head')
      depends_on('automake', type='build', when='@master,1.5-head')
      depends_on('libtool',  type='build', when='@master,1.5-head')
      depends_on('m4',       type='build', when='@master,1.5-head')
  
      depends_on('xz', type='link', when='+xz')
      depends_on('zlib', type='link', when='+zlib')
  
      conflicts('platform=darwin',
                msg='Non-GNU libunwind needs ELF libraries Darwin does not have')
  
      provides('unwind')
  
      def flag_handler(self, name, flags):
          wrapper_flags = []
  
          if name == 'cflags':
              # https://github.com/libunwind/libunwind/pull/166
              if self.spec.satisfies('@:1.4 %gcc@10:'):
                  wrapper_flags.append('-fcommon')
  
              if '+pic' in self.spec:
                  wrapper_flags.append(self.compiler.cc_pic_flag)
  
          return (wrapper_flags, None, flags)
  
      def configure_args(self):
          spec = self.spec
          args = []
  
          if '+xz' in spec:
              args.append('--enable-minidebuginfo')
          else:
              args.append('--disable-minidebuginfo')
  
          # zlib support is available in 1.5.x and later
          if spec.satisfies('@1.5:'):
              if '+zlib' in spec:
                  args.append('--enable-zlibdebuginfo')
              else:
                  args.append('--disable-zlibdebuginfo')
  
          return args
  