iframe-proxy | Sunbelt Computer Software

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#!/usr/bin/env python
import Options
import sys, os, shutil
from Utils import cmd_output
from os.path import join, dirname, abspath
from logging import fatal
cwd = os.getcwd()
APPNAME="node.js"
# Use the directory that this file is found in to find the tools
# directory where the js2c.py file can be found.
sys.path.append(sys.argv[0] + '/tools');
import js2c
srcdir = '.'
blddir = 'build'
supported_archs = ('arm', 'ia32', 'x64') # 'mips' supported by v8, but not node
if os.environ.has_key('JOBS'):
  jobs = int(os.environ['JOBS'])
def canonical_cpu_type(arch):
  m = {'x86': 'ia32', 'i386':'ia32', 'x86_64':'x64', 'amd64':'x64'}
  if arch in m: arch = m[arch]
  if not arch in supported_archs:
    raise Exception("supported architectures are "+', '.join(supported_archs)+\
                    " but NOT '" + arch + "'.")
  return arch
def set_options(opt):
  # the gcc module provides a --debug-level option
  opt.tool_options('compiler_cxx')
  opt.tool_options('compiler_cc')
  opt.tool_options('misc')
  opt.add_option( '--debug'
                , action='store_true'
                , default=False
                , help='Build debug variant [Default: False]'
                , dest='debug'
  opt.add_option( '--profile'
                , action='store_true'
                , default=False
                , help='Enable profiling [Default: False]'
                , dest='profile'
  opt.add_option( '--efence'
                , action='store_true'
                , default=False
                , help='Build with -lefence for debugging [Default: False]'
                , dest='efence'
  opt.add_option( '--without-snapshot'
                , action='store_true'
                , default=False
                , help='Build without snapshotting V8 libraries. You might want to set this for cross-compiling. [Default: False]'
                , dest='without_snapshot'
  opt.add_option( '--without-ssl'
                , action='store_true'
                , default=False
                , help='Build without SSL'
                , dest='without_ssl'
  opt.add_option('--shared-v8'
                , action='store_true'
                , default=False
                , help='Link to a shared V8 DLL instead of static linking'
                , dest='shared_v8'
  opt.add_option( '--shared-v8-includes'
                , action='store'
                , default=False
                , help='Directory containing V8 header files'
                , dest='shared_v8_includes'
  opt.add_option( '--shared-v8-libpath'
                , action='store'
                , default=False
                , help='A directory to search for the shared V8 DLL'
                , dest='shared_v8_libpath'
  opt.add_option( '--shared-v8-libname'
                , action='store'
                , default=False
                , help="Alternative lib name to link to (default: 'v8')"
                , dest='shared_v8_libname'
  opt.add_option( '--oprofile'
                , action='store_true'
                , default=False
                , help="add oprofile support"
                , dest='use_oprofile'
  opt.add_option('--shared-cares'
                , action='store_true'
                , default=False
                , help='Link to a shared C-Ares DLL instead of static linking'
                , dest='shared_cares'
  opt.add_option( '--shared-cares-includes'
                , action='store'
                , default=False
                , help='Directory containing C-Ares header files'
                , dest='shared_cares_includes'
  opt.add_option( '--shared-cares-libpath'
                , action='store'
                , default=False
                , help='A directory to search for the shared C-Ares DLL'
                , dest='shared_cares_libpath'
  opt.add_option('--shared-libev'
                , action='store_true'
                , default=False
                , help='Link to a shared libev DLL instead of static linking'
                , dest='shared_libev'
  opt.add_option( '--shared-libev-includes'
                , action='store'
                , default=False
                , help='Directory containing libev header files'
                , dest='shared_libev_includes'
  opt.add_option( '--shared-libev-libpath'
                , action='store'
                , default=False
                , help='A directory to search for the shared libev DLL'
                , dest='shared_libev_libpath'
  opt.add_option( '--product-type'
                , action='store'
                , default='program'
                , help='What kind of product to produce (program, cstaticlib '\
                       'or cshlib) [default: %default]'
                , dest='product_type'
  opt.add_option( '--dest-cpu'
                , action='store'
                , default=None
                , help='CPU architecture to build for. Valid values are: '+\
                       ', '.join(supported_archs)
                , dest='dest_cpu'
def configure(conf):
  conf.check_tool('compiler_cxx')
  if not conf.env.CXX: conf.fatal('c++ compiler not found')
  conf.check_tool('compiler_cc')
  if not conf.env.CC: conf.fatal('c compiler not found')
  o = Options.options
  conf.env["USE_DEBUG"] = o.debug
  conf.env["SNAPSHOT_V8"] = not o.without_snapshot
  if sys.platform.startswith("sunos"):
    conf.env["SNAPSHOT_V8"] = False
  conf.env["USE_PROFILING"] = o.profile
  conf.env["USE_SHARED_V8"] = o.shared_v8 or o.shared_v8_includes or o.shared_v8_libpath or o.shared_v8_libname
  conf.env["USE_SHARED_CARES"] = o.shared_cares or o.shared_cares_includes or o.shared_cares_libpath
  conf.env["USE_SHARED_LIBEV"] = o.shared_libev or o.shared_libev_includes or o.shared_libev_libpath
  conf.env["USE_OPROFILE"] = o.use_oprofile
  if o.use_oprofile:
    conf.check(lib=['bfd', 'opagent'], uselib_store="OPROFILE")
  conf.check(lib='dl', uselib_store='DL')
  if not sys.platform.startswith("sunos") and not sys.platform.startswith("cygwin"):
    conf.env.append_value("CCFLAGS", "-rdynamic")
    conf.env.append_value("LINKFLAGS_DL", "-rdynamic")
  if sys.platform.startswith("freebsd"):
    conf.check(lib='kvm', uselib_store='KVM')
  #if Options.options.debug:
  #  conf.check(lib='profiler', uselib_store='PROFILER')
  if Options.options.efence:
    conf.check(lib='efence', libpath=['/usr/lib', '/usr/local/lib'], uselib_store='EFENCE')
  if sys.platform.startswith("freebsd"):
     if not conf.check(lib="execinfo",
                       includes=['/usr/include', '/usr/local/include'],
                       libpath=['/usr/lib', '/usr/local/lib'],
                       uselib_store="EXECINFO"):
       conf.fatal("Install the libexecinfo port from /usr/ports/devel/libexecinfo.")
  if not Options.options.without_ssl:
    if conf.check_cfg(package='openssl',
                      args='--cflags --libs',
                      uselib_store='OPENSSL'):
      Options.options.use_openssl = conf.env["USE_OPENSSL"] = True
      conf.env.append_value("CPPFLAGS", "-DHAVE_OPENSSL=1")
      libssl = conf.check_cc(lib=['ssl', 'crypto'],
                             header_name='openssl/ssl.h',
                             function_name='SSL_library_init',
                             libpath=['/usr/lib', '/usr/local/lib', '/opt/local/lib', '/usr/sfw/lib'],
                             uselib_store='OPENSSL')
      libcrypto = conf.check_cc(lib='crypto',
                                header_name='openssl/crypto.h',
                                uselib_store='OPENSSL')
      if libcrypto and libssl:
        conf.env["USE_OPENSSL"] = Options.options.use_openssl = True
        conf.env.append_value("CPPFLAGS", "-DHAVE_OPENSSL=1")
      else:
        conf.fatal("Could not autodetect OpenSSL support. " +
                   "Make sure OpenSSL development packages are installed. " +
                   "Use configure --without-ssl to disable this message.")
    Options.options.use_openssl = conf.env["USE_OPENSSL"] = False
  conf.check(lib='util', libpath=['/usr/lib', '/usr/local/lib'],
             uselib_store='UTIL')
  # normalize DEST_CPU from --dest-cpu, DEST_CPU or built-in value
  if Options.options.dest_cpu and Options.options.dest_cpu:
    conf.env['DEST_CPU'] = canonical_cpu_type(Options.options.dest_cpu)
  elif 'DEST_CPU' in os.environ and os.environ['DEST_CPU']:
    conf.env['DEST_CPU'] = canonical_cpu_type(os.environ['DEST_CPU'])
  elif 'DEST_CPU' in conf.env and conf.env['DEST_CPU']:
    conf.env['DEST_CPU'] = canonical_cpu_type(conf.env['DEST_CPU'])
  conf.check(lib='rt', uselib_store='RT')
  if sys.platform.startswith("sunos"):
    if not conf.check(lib='socket', uselib_store="SOCKET"):
      conf.fatal("Cannot find socket library")
    if not conf.check(lib='nsl', uselib_store="NSL"):
      conf.fatal("Cannot find nsl library")
  conf.sub_config('deps/libeio')
  if conf.env['USE_SHARED_V8']:
    v8_includes = [];
    if o.shared_v8_includes: v8_includes.append(o.shared_v8_includes);
    v8_libpath = [];
    if o.shared_v8_libpath: v8_libpath.append(o.shared_v8_libpath);
    if not o.shared_v8_libname: o.shared_v8_libname = 'v8'
    if not conf.check_cxx(lib=o.shared_v8_libname, header_name='v8.h',
                          uselib_store='V8',
                          includes=v8_includes,
                          libpath=v8_libpath):
      conf.fatal("Cannot find v8")
    if o.debug:
      if not conf.check_cxx(lib=o.shared_v8_libname + '_g', header_name='v8.h',
                            uselib_store='V8_G',
                            includes=v8_includes,
                            libpath=v8_libpath):
        conf.fatal("Cannot find v8_g")
  if conf.env['USE_SHARED_CARES']:
    cares_includes = [];
    if o.shared_cares_includes: cares_includes.append(o.shared_cares_includes);
    cares_libpath = [];
    if o.shared_cares_libpath: cares_libpath.append(o.shared_cares_libpath);
    if not conf.check_cxx(lib='cares',
                          header_name='ares.h',
                          uselib_store='CARES',
                          includes=cares_includes,
                          libpath=cares_libpath):
      conf.fatal("Cannot find c-ares")
    conf.sub_config('deps/c-ares')
  if conf.env['USE_SHARED_LIBEV']:
    libev_includes = [];
    if o.shared_libev_includes: libev_includes.append(o.shared_libev_includes);
    libev_libpath = [];
    if o.shared_libev_libpath: libev_libpath.append(o.shared_libev_libpath);
    if not conf.check_cxx(lib='ev', header_name='ev.h',
                          uselib_store='EV',
                          includes=libev_includes,
                          libpath=libev_libpath):
      conf.fatal("Cannot find libev")
    conf.sub_config('deps/libev')
  conf.define("HAVE_CONFIG_H", 1)
  if sys.platform.startswith("sunos"):
    conf.env.append_value ('CCFLAGS', '-threads')
    conf.env.append_value ('CXXFLAGS', '-threads')
    #conf.env.append_value ('LINKFLAGS', ' -threads')
  elif not sys.platform.startswith("cygwin"):
    threadflags='-pthread'
    conf.env.append_value ('CCFLAGS', threadflags)
    conf.env.append_value ('CXXFLAGS', threadflags)
    conf.env.append_value ('LINKFLAGS', threadflags)
  if sys.platform.startswith("darwin"):
    # used by platform_darwin_*.cc
    conf.env.append_value('LINKFLAGS', ['-framework','Carbon'])
    # cross compile for architecture specified by DEST_CPU
    if 'DEST_CPU' in conf.env:
      arch = conf.env['DEST_CPU']
      # map supported_archs to GCC names:
      arch_mappings = {'ia32': 'i386', 'x64': 'x86_64'}
      if arch in arch_mappings:
        arch = arch_mappings[arch]
      flags = ['-arch', arch]
      conf.env.append_value('CCFLAGS', flags)
      conf.env.append_value('CXXFLAGS', flags)
      conf.env.append_value('LINKFLAGS', flags)
  if 'DEST_CPU' in conf.env:
    arch = conf.env['DEST_CPU']
    # TODO: -m32 is only available on 64 bit machines, so check host type
    flags = None
    if arch == 'ia32':
      flags = '-m32'
    if flags:
      conf.env.append_value('CCFLAGS', flags)
      conf.env.append_value('CXXFLAGS', flags)
      conf.env.append_value('LINKFLAGS', flags)
  # Needed for getaddrinfo in libeio
  conf.env.append_value("CPPFLAGS", "-DX_STACKSIZE=%d" % (1024*64))
  conf.env.append_value('CPPFLAGS',  '-D_LARGEFILE_SOURCE')
  conf.env.append_value('CPPFLAGS',  '-D_FILE_OFFSET_BITS=64')
  conf.env.append_value('CPPFLAGS',  '-DEV_MULTIPLICITY=0')
  ## needed for node_file.cc fdatasync
  ## Strangely on OSX 10.6 the g++ doesn't see fdatasync but gcc does?
  code =  """
    #include <unistd.h>
    int main(void)
       int fd = 0;
       fdatasync (fd);
       return 0;
  if conf.check_cxx(msg="Checking for fdatasync(2) with c++", fragment=code):
    conf.env.append_value('CPPFLAGS', '-DHAVE_FDATASYNC=1')
    conf.env.append_value('CPPFLAGS', '-DHAVE_FDATASYNC=0')
  # platform
  conf.env.append_value('CPPFLAGS', '-DPLATFORM="' + conf.env['DEST_OS'] + '"')
  if not sys.platform.startswith('win'):
    conf.env.append_value('CPPFLAGS', '-D__POSIX__=1')
  platform_file = "src/platform_%s.cc" % conf.env['DEST_OS']
  if os.path.exists(join(cwd, platform_file)):
    Options.options.platform_file = True
    conf.env["PLATFORM_FILE"] = platform_file
    Options.options.platform_file = False
    conf.env["PLATFORM_FILE"] = "src/platform_none.cc"
  if conf.env['USE_PROFILING'] == True:
    conf.env.append_value('CPPFLAGS', '-pg')
    conf.env.append_value('LINKFLAGS', '-pg')
  conf.env.append_value('CPPFLAGS', '-Wno-unused-parameter');
  conf.env.append_value('CPPFLAGS', '-D_FORTIFY_SOURCE=2');
  # Split off debug variant before adding variant specific defines
  debug_env = conf.env.copy()
  conf.set_env_name('debug', debug_env)
  # Configure debug variant
  conf.setenv('debug')
  debug_env.set_variant('debug')
  debug_env.append_value('CPPFLAGS', '-DDEBUG')
  debug_compile_flags = ['-g', '-O0', '-Wall', '-Wextra']
  debug_env.append_value('CCFLAGS', debug_compile_flags)
  debug_env.append_value('CXXFLAGS', debug_compile_flags)
  conf.write_config_header("config.h")
  # Configure default variant
  conf.setenv('default')
  conf.env.append_value('CPPFLAGS', '-DNDEBUG')
  default_compile_flags = ['-g', '-O3']
  conf.env.append_value('CCFLAGS', default_compile_flags)
  conf.env.append_value('CXXFLAGS', default_compile_flags)
  conf.write_config_header("config.h")
def v8_cmd(bld, variant):
  scons = join(cwd, 'tools/scons/scons.py')
  deps_src = join(bld.path.abspath(),"deps")
  v8dir_src = join(deps_src,"v8")
  # NOTE: We want to compile V8 to export its symbols. I.E. Do not want
  # -fvisibility=hidden. When using dlopen() it seems that the loaded DSO
  # cannot see symbols in the executable which are hidden, even if the
  # executable is statically linked together...
  # XXX Change this when v8 defaults x86_64 to native builds
  # Possible values are (arm, ia32, x64, mips).
  arch = ""
  if bld.env['DEST_CPU']:
    arch = "arch="+bld.env['DEST_CPU']
  if variant == "default":
    mode = "release"
    mode = "debug"
  if bld.env["SNAPSHOT_V8"]:
    snapshot = "snapshot=on"
    snapshot = ""
  if bld.env["USE_OPROFILE"]:
    profile = "prof=oprofile"
    profile = ""
  cmd_R = sys.executable + ' "%s" -j %d -C "%s" -Y "%s" visibility=default mode=%s %s library=static %s %s'
  cmd = cmd_R % ( scons
                , Options.options.jobs
                , bld.srcnode.abspath(bld.env_of_name(variant))
                , v8dir_src
                , mode
                , arch
                , snapshot
		, profile
  if sys.platform.startswith("sunos"): cmd += ' toolchain=gcc'
  return ("echo '%s' && " % cmd) + cmd
def build_v8(bld):
  v8 = bld.new_task_gen(
    source        = 'deps/v8/SConstruct '
                    + bld.path.ant_glob('v8/include/*')
                    + bld.path.ant_glob('v8/src/*'),
    target        = bld.env["staticlib_PATTERN"] % "v8",
    rule          = v8_cmd(bld, "default"),
    before        = "cxx",
    install_path  = None)
  v8.uselib = "EXECINFO"
  bld.env["CPPPATH_V8"] = "deps/v8/include"
  t = join(bld.srcnode.abspath(bld.env_of_name("default")), v8.target)
  bld.env_of_name('default').append_value("LINKFLAGS_V8", t)
  ### v8 debug
  if bld.env["USE_DEBUG"]:
    v8_debug = v8.clone("debug")
    v8_debug.rule   = v8_cmd(bld, "debug")
    v8_debug.target = bld.env["staticlib_PATTERN"] % "v8_g"
    v8_debug.uselib = "EXECINFO"
    bld.env["CPPPATH_V8_G"] = "deps/v8/include"
    t = join(bld.srcnode.abspath(bld.env_of_name("debug")), v8_debug.target)
    bld.env_of_name('debug').append_value("LINKFLAGS_V8_G", t)
  bld.install_files('${PREFIX}/include/node/', 'deps/v8/include/*.h')
def build(bld):
  ## This snippet is to show full commands as WAF executes
  import Build
  old = Build.BuildContext.exec_command
  def exec_command(self, cmd, **kw):
    if isinstance(cmd, list): print(" ".join(cmd))
    return old(self, cmd, **kw)
  Build.BuildContext.exec_command = exec_command
  Options.options.jobs=jobs
  product_type = Options.options.product_type
  product_type_is_lib = product_type != 'program'
  print "DEST_OS: " + bld.env['DEST_OS']
  print "DEST_CPU: " + bld.env['DEST_CPU']
  print "Parallel Jobs: " + str(Options.options.jobs)
  print "Product type: " + product_type
  bld.add_subdirs('deps/libeio')
  if not bld.env['USE_SHARED_V8']: build_v8(bld)
  if not bld.env['USE_SHARED_LIBEV']: bld.add_subdirs('deps/libev')
  if not bld.env['USE_SHARED_CARES']: bld.add_subdirs('deps/c-ares')
  ### http_parser
  http_parser = bld.new_task_gen("cc")
  http_parser.source = "deps/http_parser/http_parser.c"
  http_parser.includes = "deps/http_parser/"
  http_parser.name = "http_parser"
  http_parser.target = "http_parser"
  http_parser.install_path = None
  if bld.env["USE_DEBUG"]:
    http_parser.clone("debug")
  ### src/native.cc
  def make_macros(loc, content):
    f = open(loc, 'w')
    f.write(content)
    f.close
  macros_loc_debug   = join(
     bld.srcnode.abspath(bld.env_of_name("debug")),
     "macros.py"
  macros_loc_default = join(
    bld.srcnode.abspath(bld.env_of_name("default")),
    "macros.py"
  make_macros(macros_loc_debug, "")  # leave debug(x) as is in debug build
  # replace debug(x) with nothing in release build
  make_macros(macros_loc_default, "macro debug(x) = ;\n")
  def javascript_in_c(task):
    env = task.env
    source = map(lambda x: x.srcpath(env), task.inputs)
    targets = map(lambda x: x.srcpath(env), task.outputs)
    source.append(macros_loc_default)
    js2c.JS2C(source, targets)
  def javascript_in_c_debug(task):
    env = task.env
    source = map(lambda x: x.srcpath(env), task.inputs)
    targets = map(lambda x: x.srcpath(env), task.outputs)
    source.append(macros_loc_debug)
    js2c.JS2C(source, targets)
  native_cc = bld.new_task_gen(
    source='src/node.js ' + bld.path.ant_glob('lib/*.js'),
    target="src/node_natives.h",
    before="cxx",
    install_path=None
  # Add the rule /after/ cloning the debug
  # This is a work around for an error had in python 2.4.3 (I'll paste the
  # error that was had into the git commit meessage. git-blame to find out
  # where.)
  if bld.env["USE_DEBUG"]:
    native_cc_debug = native_cc.clone("debug")
    native_cc_debug.rule = javascript_in_c_debug
  native_cc.rule = javascript_in_c
  ### node lib
  node = bld.new_task_gen("cxx", product_type)
  node.name         = "node"
  node.target       = "node"
  node.uselib = 'RT EV OPENSSL CARES EXECINFO DL KVM SOCKET NSL UTIL OPROFILE'
  node.add_objects = 'eio http_parser'
  if product_type_is_lib:
    node.install_path = '${PREFIX}/lib'
    node.install_path = '${PREFIX}/bin'
  node.chmod = 0755
  node.source = """
    src/node.cc
    src/node_buffer.cc
    src/node_javascript.cc
    src/node_extensions.cc
    src/node_http_parser.cc
    src/node_net.cc
    src/node_io_watcher.cc
    src/node_child_process.cc
    src/node_constants.cc
    src/node_cares.cc
    src/node_events.cc
    src/node_file.cc
    src/node_signal_watcher.cc
    src/node_stat_watcher.cc
    src/node_stdio.cc
    src/node_timer.cc
    src/node_script.cc
    src/node_os.cc
  node.source += bld.env["PLATFORM_FILE"]
  if not product_type_is_lib:
    node.source = 'src/node_main.cc '+node.source
  if bld.env["USE_OPENSSL"]: node.source += " src/node_crypto.cc "
  node.includes = """
    deps/libeio
    deps/http_parser
  if not bld.env["USE_SHARED_V8"]: node.includes += ' deps/v8/include '
  if not bld.env["USE_SHARED_LIBEV"]:
    node.add_objects += ' ev '
    node.includes += ' deps/libev '
  if not bld.env["USE_SHARED_CARES"]:
    node.add_objects += ' cares '
    node.includes += '  deps/c-ares deps/c-ares/' + bld.env['DEST_OS'] + '-' + bld.env['DEST_CPU']
  if sys.platform.startswith('cygwin'):
    bld.env.append_value('LINKFLAGS', '-Wl,--export-all-symbols')
    bld.env.append_value('LINKFLAGS', '-Wl,--out-implib,default/libnode.dll.a')
    bld.env.append_value('LINKFLAGS', '-Wl,--output-def,default/libnode.def')
    bld.install_files('${PREFIX}/lib', "build/default/libnode.*")
  def subflags(program):
    x = { 'CCFLAGS'   : " ".join(program.env["CCFLAGS"]).replace('"', '\\"')
        , 'CPPFLAGS'  : " ".join(program.env["CPPFLAGS"]).replace('"', '\\"')
        , 'LIBFLAGS'  : " ".join(program.env["LIBFLAGS"]).replace('"', '\\"')
        , 'PREFIX'    : program.env["PREFIX"]
        , 'VERSION'   : '0.3.2' # FIXME should not be hard-coded, see NODE_VERSION_STRING in src/node_version.
    return x
  # process file.pc.in -> file.pc
  node_conf = bld.new_task_gen('subst', before="cxx")
  node_conf.source = 'src/node_config.h.in'
  node_conf.target = 'src/node_config.h'
  node_conf.dict = subflags(node)
  node_conf.install_path = '${PREFIX}/include/node'
  if bld.env["USE_DEBUG"]:
    node_g = node.clone("debug")
    node_g.target = "node_g"
    node_g.uselib += ' V8_G'
    node_conf_g = node_conf.clone("debug")
    node_conf_g.dict = subflags(node_g)
    node_conf_g.install_path = None
  # After creating the debug clone, append the V8 dep
  node.uselib += ' V8'
  bld.install_files('${PREFIX}/include/node/', """
    config.h
    src/node.h
    src/node_object_wrap.h
    src/node_buffer.h
    src/node_events.h
    src/node_version.h
  # Only install the man page if it exists.
  # Do 'make doc install' to build and install it.
  if os.path.exists('doc/node.1'):
    bld.install_files('${PREFIX}/share/man/man1/', 'doc/node.1')
  bld.install_files('${PREFIX}/bin/', 'tools/node-waf', chmod=0755)
  bld.install_files('${PREFIX}/lib/node/wafadmin', 'tools/wafadmin/*.py')
  bld.install_files('${PREFIX}/lib/node/wafadmin/Tools', 'tools/wafadmin/Tools/*.py')
  # create a pkg-config(1) file
  node_conf = bld.new_task_gen('subst', before="cxx")
  node_conf.source = 'tools/nodejs.pc.in'
  node_conf.target = 'tools/nodejs.pc'
  node_conf.dict = subflags(node)
  bld.install_files('${PREFIX}/lib/pkgconfig', 'tools/nodejs.pc')
def shutdown():
  Options.options.debug
  # HACK to get binding.node out of build directory.
  # better way to do this?
  if Options.commands['configure']:
    if not Options.options.use_openssl:
      print "WARNING WARNING WARNING"
      print "OpenSSL not found. Will compile Node without crypto support!"
    if not Options.options.platform_file:
      print "WARNING: Platform not fully supported. Using src/platform_none.cc"
  elif not Options.commands['clean']:
    if os.path.exists('build/default/node') and not os.path.exists('node'):
      os.symlink('build/default/node', 'node')
    if os.path.exists('build/debug/node_g') and not os.path.exists('node_g'):
      os.symlink('build/debug/node_g', 'node_g')
    if os.path.exists('node'): os.unlink('node')
    if os.path.exists('node_g'): os.unlink('node_g')
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