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#!/usr/bin/env python
# encoding: utf-8
# andersg at 0x63.nu 2007

import os
import Task, Options, Utils
from Configure import conf
from TaskGen import extension, taskgen, feature, before

xsubpp_str = '${PERL} ${XSUBPP} -noprototypes -typemap ${EXTUTILS_TYPEMAP} ${SRC} > ${TGT}'
EXT_XS = ['.xs']

@before('apply_incpaths', 'apply_type_vars', 'apply_lib_vars')
def init_perlext(self):
      self.uselib = self.to_list(getattr(self, 'uselib', ''))
      if not 'PERL' in self.uselib: self.uselib.append('PERL')
      if not 'PERLEXT' in self.uselib: self.uselib.append('PERLEXT')
      self.env['shlib_PATTERN'] = self.env['perlext_PATTERN']

def xsubpp_file(self, node):
      outnode = node.change_ext('.c')
      self.create_task('xsubpp', node, outnode)

Task.simple_task_type('xsubpp', xsubpp_str, color='BLUE', before='cc cxx', shell=False)

def check_perl_version(conf, minver=None):
      Checks if perl is installed.

      If installed the variable PERL will be set in environment.

      Perl binary can be overridden by --with-perl-binary config variable

      res = True

      if not getattr(Options.options, 'perlbinary', None):
            perl = conf.find_program("perl", var="PERL")
            if not perl:
                  return False
            perl = Options.options.perlbinary
            conf.env['PERL'] = perl

      version = Utils.cmd_output(perl + " -e'printf \"%vd\", $^V'")
      if not version:
            res = False
            version = "Unknown"
      elif not minver is None:
            ver = tuple(map(int, version.split(".")))
            if ver < minver:
                  res = False

      if minver is None:
            cver = ""
            cver = ".".join(map(str,minver))
      conf.check_message("perl", cver, res, version)
      return res

def check_perl_module(conf, module):
      Check if specified perlmodule is installed.

      Minimum version can be specified by specifying it after modulename
      like this:

      conf.check_perl_module("Some::Module 2.92")
      cmd = [conf.env['PERL'], '-e', 'use %s' % module]
      r = Utils.pproc.call(cmd, stdout=Utils.pproc.PIPE, stderr=Utils.pproc.PIPE) == 0
      conf.check_message("perl module %s" % module, "", r)
      return r

def check_perl_ext_devel(conf):
      Check for configuration needed to build perl extensions.

      Sets different xxx_PERLEXT variables in the environment.

      Also sets the ARCHDIR_PERL variable useful as installation path,
      which can be overridden by --with-perl-archdir option.
      if not conf.env['PERL']:
            return False

      perl = conf.env['PERL']

      def read_out(cmd):
            return Utils.to_list(Utils.cmd_output(perl + cmd))

      conf.env["LINKFLAGS_PERLEXT"] = read_out(" -MConfig -e'print $Config{lddlflags}'")
      conf.env["CPPPATH_PERLEXT"] = read_out(" -MConfig -e'print \"$Config{archlib}/CORE\"'")
      conf.env["CCFLAGS_PERLEXT"] = read_out(" -MConfig -e'print \"$Config{ccflags} $Config{cccdlflags}\"'")

      conf.env["XSUBPP"] = read_out(" -MConfig -e'print \"$Config{privlib}/ExtUtils/xsubpp$Config{exe_ext}\"'")
      conf.env["EXTUTILS_TYPEMAP"] = read_out(" -MConfig -e'print \"$Config{privlib}/ExtUtils/typemap\"'")

      if not getattr(Options.options, 'perlarchdir', None):
            conf.env["ARCHDIR_PERL"] = Utils.cmd_output(perl + " -MConfig -e'print $Config{sitearch}'")
            conf.env["ARCHDIR_PERL"] = getattr(Options.options, 'perlarchdir')

      conf.env['perlext_PATTERN'] = '%s.' + Utils.cmd_output(perl + " -MConfig -e'print $Config{dlext}'")

      return True

def set_options(opt):
      opt.add_option("--with-perl-binary", type="string", dest="perlbinary", help = 'Specify alternate perl binary', default=None)
      opt.add_option("--with-perl-archdir", type="string", dest="perlarchdir", help = 'Specify directory where to install arch specific files', default=None)

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