lyx_mirror/development/scons/SConstruct

# vi:filetype=python:expandtab:tabstop=2:shiftwidth=2
#
# file SConstruct
#
# This file is part of LyX, the document processor.
# Licence details can be found in the file COPYING.
#
# \author Bo Peng
# Full author contact details are available in file CREDITS.
#
#
# This is a scons based building system for lyx, you can use it as follows:
#
#   $ cd development/scons
#   $ scons [options] [targets]
# or:
#   $ scons -f development/scons/SConstruct [options] [targets]
# and:
#   $ scons [prefix=.] install
#
# Where:
#   * targets can be one or more of lyx, tex2lyx, client, po, install.
#     default to lyx, you can use 'scons all' to build all targets except 
#     for install
#   * options: use scons -h for details about options, the most important
#     one is frontend=qt3|qt4.
#     - qt3 is used by default on linux, cygwin and mac
#     - qt4 is used by default on win32/mingw
#
# File layouts (Important):
#   * Unless you specify builddir=dir, building will happen
#     in $BUILDDIR = $mode, which can be debug or release
#   * $BUILDDIR has subdirectories
#       libs:      all intermediate libraries
#       boost:     boost libraries, if boost=included is used
#       qt3/4:     frontend-specific objects
#   * executables will be copied to $BUILDDIR/
#
# Hints:
#   * scons fast_start=yes
#     If env.cache exists, bypass all tests and use existing src/config.h
#
#   * scons --config=force
#     force re-configuration (use scons -H for details)
#
#   * check config.log to see why config has failed
#
#   * use extra_inc_path, extra_lib_path, qt_dir, qt_inc_path
#     qt_lib_path to help locate qt and other libraries.
#     There are also extra_inc_path1, extra_lib_path1 if you need to spacify
#     more than one extra paths.
#
#   * executed commands will be logged in scons_lyx.log. You can use logfile=
#     option to save log to another file.
#
# Notes:
#
#   * scons dist etc may be added later. Interested contributors can follow
#       http://www.scons.org/cgi-sys/cgiwrap/scons/moin.cgi/AccumulateBuilder
#     or
#       http://www.scons.org/cgi-sys/cgiwrap/scons/moin.cgi/DistTarBuilder
#     Please also see the commented out code in scons_utils.py
#   
#   * NSIS support can be found here.
#     http://www.scons.org/cgi-sys/cgiwrap/scons/moin.cgi/NsisSconsTool
#
#   * rpm support?
#     http://www.scons.org/cgi-sys/cgiwrap/scons/moin.cgi/RpmHonchoTemp
#
#   However, I decide to wait since scons seems to be standardizing these
#   features.
#

import os, sys, copy, cPickle

# config/scons_utils.py defines a few utility function
sys.path.append('config')
import scons_utils as utils

#----------------------------------------------------------
# Required runtime environment
#----------------------------------------------------------

# FIXME: I remember lyx requires higher version of python?
EnsurePythonVersion(1, 5)
# Please use at least 0.96.91 (not 0.96.1)
EnsureSConsVersion(0, 96)

# determine where I am ...
#
# called as 'scons -f development/scons/SConstruct'
if os.path.isfile('SConstruct'):
  TOP_SRC_DIR = '../..'
  SCONS_DIR = '.'
# called as 'cd development/scons; scons'
else:
  TOP_SRC_DIR = '.'
  SCONS_DIR = 'development/scons'

#----------------------------------------------------------
# Global definitions
#----------------------------------------------------------

# some global settings
PACKAGE_VERSION = '1.5.0svn'
DEVEL_VERSION = True
default_build_mode = 'debug'

PACKAGE = 'lyx'
PACKAGE_BUGREPORT = 'lyx-devel@lists.lyx.org'
PACKAGE_NAME = 'LyX'
PACKAGE_TARNAME = 'lyx'
PACKAGE_STRING = '%s %s' % (PACKAGE_NAME, PACKAGE_VERSION)

# various cache/log files
default_log_file = 'scons_lyx.log'
env_cache_file = 'env.cache'


#----------------------------------------------------------
# platform dependent settings
#----------------------------------------------------------
if os.name == 'nt':
  platform_name = 'win32'
  default_frontend = 'qt4'
  # boost and gettext are unlikely to be installed already
  default_boost_opt = 'included'
  default_gettext_opt = 'included'
  default_pch_opt = False
  default_with_x = False
  spell_checker = 'auto'
  # boost_posix indicates to boost which API to use (posix or windows).
  # If not specified, boost tries to figure out by itself, but it may fail.
  boost_posix = False
  packaging_method = 'windows'
  default_prefix = 'c:/program files/lyx'
  share_dir = 'Resources'
  man_dir = 'Resources/man/man1'
  locale_dir = 'Resources/locale'
elif os.name == 'posix' and sys.platform != 'cygwin':
  platform_name = sys.platform
  default_frontend = 'qt3'
  # try to use system boost/gettext libraries
  default_boost_opt = 'auto'
  default_gettext_opt = 'auto'
  default_pch_opt = False
  default_with_x = True
  boost_posix = True
  packaging_method = 'posix'
  default_prefix = '/usr/local/'
  share_dir = 'share/lyx'
  man_dir = 'man/man1'
  locale_dir = 'share/locale'
elif os.name == 'posix' and sys.platform == 'cygwin':
  platform_name = 'cygwin'
  default_frontend = 'qt3'
  # force the use of cygwin/boost/gettext
  default_boost_opt = 'system'
  default_gettext_opt = 'system'
  default_pch_opt = False
  default_with_x = True
  boost_posix = True
  packaging_method = 'posix'
  default_prefix = '/usr/local/'
  share_dir = 'share/lyx'
  man_dir = 'man/man1'
  locale_dir = 'share/locale'
elif os.name == 'darwin':
  platform_name = 'mac'
  default_frontend = 'qt3'
  # to be safe
  default_boost_opt = 'included'
  default_gettext_opt = 'included'
  default_pch_opt = False
  default_with_x = False
  boost_posix = True
  packaging_method = 'mac'
  # FIXME: where to install?
  default_prefix = '/usr/local/'
  share_dir = 'Resources'
  man_dir = 'Resources/man/man1'
  locale_dir = 'Resources/locale'
else:  # unsupported system
  platform_name = 'others'
  default_frontend = 'qt3'
  # to be safe
  default_boost_opt = 'included'
  default_gettext_opt = 'included'
  default_pch_opt = False
  default_with_x = True
  boost_posix = False
  packaging_method = 'posix'
  default_prefix = '/usr/local/'
  share_dir = 'share/lyx'
  man_dir = 'man/man1'
  locale_dir = 'share/locale'


#---------------------------------------------------------
# Handling options
#----------------------------------------------------------
#
if os.path.isfile('config.py'):
  print "Getting options from config.py..."
  print open('config.py').read()

opts = Options(['config.py'])
opts.AddOptions(
  # frontend,
  EnumOption('frontend', 'Main GUI', default_frontend,
    allowed_values = ('xform', 'qt3', 'qt4', 'gtk') ),
  # debug or release build
  EnumOption('mode', 'Building method', default_build_mode,
    allowed_values = ('debug', 'release') ),
  # boost libraries
  EnumOption('boost',
    'Use included, system boost library, or try sytem boost first.',
    default_boost_opt,
    allowed_values = (
      'auto',       # detect boost, if not found, use included
      'included',   # always use included boost
      'system',     # always use system boost, fail if can not find
      ) ),
  # FIXME: not implemented yet.
  EnumOption('gettext',
    'Use included, system gettext library, or try sytem gettext first',
    default_gettext_opt,
    allowed_values = (
      'auto',       # detect gettext, if not found, use included
      'included',   # always use included gettext
      'system',     # always use system gettext, fail if can not find
      ) ),
  #
  EnumOption('spell', 'Choose spell checker to use.', 'auto',
    allowed_values = ('aspell', 'pspell', 'ispell', 'auto') ),
  #
  BoolOption('fast_start', 'Whether or not use cached tests and keep current config.h', True),
  # FIXME: I do not know how pch is working. Ignore this option now.
  BoolOption('pch', '(NA) Whether or not use pch', default_pch_opt),
  # enable assertion, (config.h has ENABLE_ASSERTIOS
  BoolOption('assertions', 'Use assertions', True),
  # enable warning, (config.h has WITH_WARNINGS)
  BoolOption('warnings', 'Use warnings', True),
  # enable glib, (config.h has _GLIBCXX_CONCEPT_CHECKS)
  BoolOption('concept_checks', 'Enable concept checks', True),
  # FIXME: I do not know what is nls
  BoolOption('nls', '(NA) Whether or not use native language support', False),
  # FIXME: not implemented
  BoolOption('profile', '(NA) Whether or not enable profiling', False),
  # FIXME: not implemented
  BoolOption('std_debug', '(NA) Whether or not turn on stdlib debug', False),
  # using x11?
  BoolOption('X11', 'Use x11 windows system', default_with_x),
  # FIXME: not implemented
  BoolOption('libintl', '(NA) Use libintl library', False),
  # 
  PathOption('qt_dir', 'Path to qt directory', None),
  #
  PathOption('qt_include_path', 'Path to qt include directory', None),
  #
  PathOption('qt_lib_path', 'Path to qt library directory', None),
  # build directory, will use $mode if not set
  PathOption('build_dir', 'Build directory', None),
  # extra include and libpath
  PathOption('extra_inc_path', 'Extra include path', None),
  #
  PathOption('extra_lib_path', 'Extra library path', None),
  #
  PathOption('extra_inc_path1', 'Extra include path', None),
  #
  PathOption('extra_lib_path1', 'Extra library path', None),
  # can be set to a non-existing directory
  ('prefix', 'install architecture-independent files in PREFIX', None),
  # version suffix
  ('version_suffix', 'install lyx as lyx-suffix', ''),
  #
  PathOption('exec_prefix', 'install architecture-independent executable files in PREFIX', None),
  # FIXME: not implemented
  PathOption('intl_prefix', '(NA) Path to intl library', None),
  # log file
  ('logfile', 'save commands (not outputs) to logfile', default_log_file),
  # Path to aikasurus
  PathOption('aikasurus_path', 'Path to aikasurus library', None),
  # environment variable can be set as options. (DO NOT set defaults)
  ('CC', '$CC', None),
  ('LINK', '$LINK', None),
  ('CPP', '$CPP', None),
  ('CXX', '$CXX', None),
  ('CXXCPP', '$CXXCPP', None),
  ('CCFLAGS', '$CCFLAGS', None),
  ('CPPFLAGS', '$CPPFLAGS', None),
  ('LDFLAGS', '$LDFLAGS', None),
)


#---------------------------------------------------------
# Setting up environment
#---------------------------------------------------------

env = Environment(options = opts)

# Determine the frontend to use, which may be loaded
# from option cache
frontend = env.get('frontend', default_frontend)
# make sure the key exists
env['frontend'] = frontend
#
use_X11 = env.get('X11', default_with_x)

# whether or not use current config.h, and cached tests
if env['fast_start'] and os.path.isfile(env_cache_file):
  fast_start = True
  SetOption('implicit_cache', 1)
  cache_file = open(env_cache_file)
  env_cache = cPickle.load(cache_file)
  cache_file.close()
  print '------------ fast_start mode --------------------'
  print '  Use cached test results and current config.h'
  print '  use fast_start=no to override'
  print '-------------------------------------------------'
else:
  fast_start = False
  SetOption('implicit_cache', 0)
  env_cache = {}

# set individual variables since I do not really like ENV = os.environ
env['ENV']['PATH'] = os.environ.get('PATH')
env['ENV']['HOME'] = os.environ.get('HOME')
env['TOP_SRC_DIR'] = TOP_SRC_DIR
env['SCONS_DIR'] = SCONS_DIR
# install to default_prefix by default
env['PREFIX'] = env.get('prefix', default_prefix)
if env.has_key('exec_prefix'):
  env['BIN_DIR'] = env['exec_prefix']
else:
  env['BIN_DIR'] = os.path.join(env['PREFIX'], 'bin')
env['SHARE_DIR'] = os.path.join(env['PREFIX'], share_dir)
env['MAN_DIR'] = os.path.join(env['PREFIX'], man_dir)
env['LOCALE_DIR'] = os.path.join(env['PREFIX'], locale_dir)

# speed up source file processing
#env['CPPSUFFIXES'] = ['.C', '.cc', '.cpp']
#env['CXXSUFFIX'] = ['.C']

def getEnvVariable(env, name):
  # first try command line argument (override environment settings)
  if ARGUMENTS.has_key(name) and ARGUMENTS[name].strip() != '':
    env[name] = ARGUMENTS[name]
  # then use environment default
  elif os.environ.has_key(name) and os.environ[name].strip() != '':
    env[name] = os.environ[name]
    print "Acquiring varaible %s from system environment: %s" % (name, env[name])
  # finally, env['CC'] etc is set to the default values of Options.
  # and env['CPP'] etc does not exist

getEnvVariable(env, 'CC')
getEnvVariable(env, 'LINK')
getEnvVariable(env, 'CPP')
getEnvVariable(env, 'CXX')
getEnvVariable(env, 'CXXCPP')
getEnvVariable(env, 'CCFLAGS')
getEnvVariable(env, 'CXXFLAGS')
getEnvVariable(env, 'CPPFLAGS')
getEnvVariable(env, 'LDFLAGS')


#
# frontend, mode, BUILDDIR and LOCALLIBPATH=BUILDDIR/libs
#
env['mode'] = env.get('mode', default_build_mode)
# lyx will be built to $build/build_dir so it is possible
# to build multiple build_dirs using the same source
# $mode can be debug or release
if env.has_key('build_dir') and env['build_dir']:
  build_dir = env['build_dir']
  env['BUILDDIR'] = build_dir
else:
  # Determine the name of the build $mode
  env['BUILDDIR'] = '#' + env['mode']
# all built libraries will go to build_dir/libs
# (This is different from the make file approach)
env['LOCALLIBPATH'] = '$BUILDDIR/libs'
env.AppendUnique(LIBPATH = ['$LOCALLIBPATH'])

#
# QTDIR, QT_LIB_PATH, QT_INC_PATH
#
if env.has_key('qt_dir') and env['qt_dir']:
  env['QTDIR'] = env['qt_dir']
  # add path to the qt tools
  env.AppendUnique(LIBPATH = [os.path.join(env['qt_dir'], 'lib')])
  # set environment so that moc etc can be found even if its path is not set properly
  env.PrependENVPath('PATH', os.path.join(env['qt_dir'], 'bin'))
else:
  env['QTDIR'] = os.environ.get('QTDIR', '/usr/lib/qt-3.3')

if env.has_key('qt_lib_path') and env['qt_lib_path']:
  env['QT_LIB_PATH'] = env['qt_lib_path']
else:
  env['QT_LIB_PATH'] = '$QTDIR/lib'
env.AppendUnique(LIBPATH = ['$QT_LIB_PATH'])
# qt4 seems to be using pkg_config
env.PrependENVPath('PKG_CONFIG_PATH', env.subst('$QT_LIB_PATH'))

if env.has_key('qt_inc_path') and env['qt_inc_path']:
  env['QT_INC_PATH'] = env['qt_inc_path']
elif os.path.isdir(os.path.join(env.subst('$QTDIR'), 'include')):
  env['QT_INC_PATH'] = '$QTDIR/include'
else: # have to guess
  env['QT_INC_PATH'] = '/usr/include/$frontend/'
# Note that this CPPPATH is for testing only
# it will be removed before calling SConscript
env['CPPPATH'] = [env['QT_INC_PATH']]

#
# extra_inc_path and extra_lib_path
#
if env.has_key('extra_inc_path') and env['extra_inc_path']:
  env.AppendUnique(CPPPATH = [env['extra_inc_path']])
if env.has_key('extra_lib_path') and env['extra_lib_path']:
  env.AppendUnique(LIBPATH = [env['extra_lib_path']])
if env.has_key('extra_inc_path1') and env['extra_inc_path1']:
  env.AppendUnique(CPPPATH = [env['extra_inc_path1']])
if env.has_key('extra_lib_path1') and env['extra_lib_path1']:
  env.AppendUnique(LIBPATH = [env['extra_lib_path1']])
if env.has_key('aikasurus_path') and env['aikasurus_path']:
  env.AppendUnique(LIBPATH = [env['aikasurus_path']])

#
# this is a bit out of place (after auto-configration)
# but it is required to do the tests.
if platform_name == 'win32':
  env.AppendUnique(CPPPATH = ['#c:/MinGW/include'])
  env.Tool('mingw')

# under windows, scons is confused by .C/.c and uses gcc instead of
# g++. I am forcing the use of g++ here. This is expected to change
# after lyx renames all .C files to .cpp
#
# Note that this step has to be after env.Tool('mingw') step
# since env.Tool('mingw') will set env['CC'] etc.
#
if env.has_key('CXX') and env['CXX']:
  env['CC'] = env['CXX']
  env['LINK'] = env['CXX']
else:
  env['CC'] = 'g++'
  env['LINK'] = 'g++'


#----------------------------------------------------------
# Autoconf business
#----------------------------------------------------------

conf = Configure(env,
  custom_tests = {
    'CheckPkgConfig' : utils.checkPkgConfig,
    'CheckPackage' : utils.checkPackage,
    'CheckPutenv' : utils.checkPutenv,
    'CheckIstreambufIterator' : utils.checkIstreambufIterator,
    'CheckMkdirOneArg' : utils.checkMkdirOneArg,
    'CheckStdCount' : utils.checkStdCount,
    'CheckSelectArgType' : utils.checkSelectArgType,
    'CheckBoostLibraries' : utils.checkBoostLibraries,
    'CheckMsgFmt' : utils.checkMsgFmt,
  }
)

# pkg-config? (if not, we use hard-coded options)
if not fast_start:
  if conf.CheckPkgConfig('0.15.0'):
    env['HAS_PKG_CONFIG'] = True
  else:
    print 'pkg-config >= 0.1.50 is not found'
    env['HAS_PKG_CONFIG'] = False
  env_cache['HAS_PKG_CONFIG'] = env['HAS_PKG_CONFIG']
else:
  env['HAS_PKG_CONFIG'] = env_cache['HAS_PKG_CONFIG']

# zlib? This is required. (fast_start assumes the existance of zlib)
if not fast_start and not conf.CheckLibWithHeader('z', 'zlib.h', 'C'):
    print 'Did not find libz or zlib.h, exiting!'
    Exit(1)

# qt libraries?
if not fast_start:
  #
  # qt3 does not use pkg_config
  if frontend == 'qt3':
    if not conf.CheckLibWithHeader('qt-mt', 'qapp.h', 'c++', 'QApplication qapp();'):
      print 'Did not find qt libraries, exiting!'
      Exit(1)
  elif frontend == 'qt4':
    succ = False
    # first: try pkg_config
    if env['HAS_PKG_CONFIG']:
      succ = conf.CheckPackage('QtCore') or conf.CheckPackage('QtCore4')
      env['QT4_PKG_CONFIG'] = succ
    # second: try to link to it
    if not succ:
      # FIXME: under linux, I can test the following perfectly
      # However, under windows, lib names need to passed as libXXX4.a ...
      succ = conf.CheckLibWithHeader('QtCore', 'QtGui/QApplication', 'c++', 'QApplication qapp();') or \
        conf.CheckLibWithHeader('QtCore4', 'QtGui/QApplication', 'c++', 'QApplication qapp();')
    # third: try to look up the path
    if not succ:
      succ = True
      for lib in ['QtCore', 'QtGui']:
        # windows version has something like QtGui4 ...
        if not (os.path.isfile(os.path.join(env.subst('$QT_LIB_PATH'), 'lib%s.a' % lib)) or \
          os.path.isfile(os.path.join(env.subst('$QT_LIB_PATH'), 'lib%s4.a' % lib))):
          succ = False
          break
    # still can not find it
    if succ:
      print "Qt4 libraries are found."
    else:
      print 'Did not find qt libraries, exiting!'
      Exit(1)


# check socket libs
if not fast_start:
  env['SOCKET_LIBS'] = []
  if conf.CheckLib('socket'):
    env['SOCKET_LIBS'].append('socket')

  # nsl is the network services library and provides a
  # transport-level interface to networking services.
  if conf.CheckLib('nsl'):
    env['SOCKET_LIBS'].append('nsl')

  env_cache['SOCKET_LIBS'] = env['SOCKET_LIBS']
else:
  env['SOCKET_LIBS'] = env_cache['SOCKET_LIBS']

if not fast_start:
  # check boost libraries
  boost_opt = ARGUMENTS.get('boost', default_boost_opt)
  # check for system boost
  succ = False
  if boost_opt in ['auto', 'system']:
    pathes = env['LIBPATH'] + ['/usr/lib', '/usr/local/lib']
    sig = conf.CheckBoostLibraries('boost_signals', pathes)
    reg = conf.CheckBoostLibraries('boost_regex', pathes)
    fil = conf.CheckBoostLibraries('boost_filesystem', pathes)
    ios = conf.CheckBoostLibraries('boost_iostreams', pathes)
    # if any of them is not found
    if ('' in [sig[0], reg[0], fil[0], ios[0]]):
      if boost_opt == 'system':
        print "Can not find system boost libraries"
        print "Please supply a path through extra_lib_path and try again."
        print "Or use boost=included to use included boost libraries."
        Exit(2)
    else:
      env['BOOST_LIBRARIES'] = [sig[1], reg[1], fil[1], ios[1]]
      # assume all boost libraries are in the same path...
      env.AppendUnique(LIBPATH = [sig[0]])
      env['INCLUDED_BOOST'] = False
      succ = True
  # now, auto and succ = false, or boost=included
  if not succ:
    # we do not need to set LIBPATH now.
    env['BOOST_LIBRARIES'] = ['boost_signals', 'boost_regex',
      'boost_filesystem', 'boost_iostreams']
    env['INCLUDED_BOOST'] = True
  env_cache['BOOST_LIBRARIES'] = env['BOOST_LIBRARIES']
  env_cache['INCLUDED_BOOST'] = env['INCLUDED_BOOST']
else:
  env['BOOST_LIBRARIES'] = env_cache['BOOST_LIBRARIES']
  env['INCLUDED_BOOST'] = env_cache['INCLUDED_BOOST']

#
# check for msgfmt command
if not fast_start:
  env['MSGFMT'] = conf.CheckMsgFmt()
  env_cache['MSGFMT'] = env['MSGFMT']
else:
  env['MSGFMT'] = env_cache['MSGFMT']


#----------------------------------------------------------
# Generating config.h
#----------------------------------------------------------
if not fast_start:
  print "Generating ", utils.config_h, "..."

  # I do not handle all macros in src/config.h.in, rather I am following a list
  # of *used-by-lyx* macros compiled by Abdelrazak Younes <younes.a@free.fr>
  #
  # Note: addToConfig etc are defined in scons_util
  utils.startConfigH(TOP_SRC_DIR)

  # HAVE_IO_H
  # HAVE_LIMITS_H
  # HAVE_LOCALE_H
  # HAVE_LOCALE
  # HAVE_PROCESS_H
  # HAVE_STDLIB_H
  # HAVE_SYS_STAT_H
  # HAVE_SYS_TIME_H
  # HAVE_SYS_TYPES_H
  # HAVE_SYS_UTIME_H
  # HAVE_UNISTD_H
  # HAVE_UTIME_H
  # HAVE_ISTREAM
  # HAVE_OSTREAM
  # HAVE_IOS

  # Check header files
  headers = [
    ('io.h', 'HAVE_IO_H', 'c'),
    ('limits.h', 'HAVE_LIMITS_H', 'c'),
    ('locale.h', 'HAVE_LOCALE_H', 'c'),
    ('locale', 'HAVE_LOCALE', 'cxx'),
    ('process.h', 'HAVE_PROCESS_H', 'c'),
    ('stdlib.h', 'HAVE_STDLIB_H', 'c'),
    ('sys/stat.h', 'HAVE_SYS_STAT_H', 'c'),
    ('sys/time.h', 'HAVE_SYS_TIME_H', 'c'),
    ('sys/types.h', 'HAVE_SYS_TYPES_H', 'c'),
    ('sys/utime.h', 'HAVE_SYS_UTIME_H', 'c'),
    ('sys/socket.h', 'HAVE_SYS_SOCKET_H', 'c'),
    ('unistd.h', 'HAVE_UNISTD_H', 'c'),
    ('utime.h', 'HAVE_UTIME_H', 'c'),
    ('istream', 'HAVE_ISTREAM', 'cxx'),
    ('ostream', 'HAVE_OSTREAM', 'cxx'),
    ('ios', 'HAVE_IOS', 'cxx')
  ]

  for header in headers:
    if (header[2] == 'c' and conf.CheckCHeader(header[0])) or \
      (header[2] == 'cxx' and conf.CheckCXXHeader(header[0])):
      utils.addToConfig('#define %s 1' % header[1], TOP_SRC_DIR)
    else:
      utils.addToConfig('/* #undef %s */' % header[1], TOP_SRC_DIR)

  # HAVE_OPEN
  # HAVE_CLOSE
  # HAVE_POPEN
  # HAVE_PCLOSE
  # HAVE__OPEN
  # HAVE__CLOSE
  # HAVE__POPEN
  # HAVE__PCLOSE
  # HAVE_GETPID
  # HAVE__GETPID
  # HAVE_MKDIR
  # HAVE__MKDIR
  # HAVE_MKTEMP
  # HAVE_MKSTEMP
  # HAVE_STRERROR
  # HAVE_FCNTL

  # Check functions
  functions = [
    ('open', 'HAVE_OPEN'),
    ('close', 'HAVE_CLOSE'),
    ('popen', 'HAVE_POPEN'),
    ('pclose', 'HAVE_PCLOSE'),
    ('_open', 'HAVE__OPEN'),
    ('_close', 'HAVE__CLOSE'),
    ('_popen', 'HAVE__POPEN'),
    ('_pclose', 'HAVE__PCLOSE'),
    ('getpid', 'HAVE_GETPID'),
    ('_getpid', 'HAVE__GETPID'),
    ('mkdir', 'HAVE_MKDIR'),
    ('_mkdir', 'HAVE__MKDIR'),
    ('mktemp', 'HAVE_MKTEMP'),
    ('mkstemp', 'HAVE_MKSTEMP'),
    ('strerror', 'HAVE_STRERROR'),
  ]

  for func in functions:
    if conf.CheckFunc(func[0]):
      utils.addToConfig('#define %s 1' % func[1], TOP_SRC_DIR)
    else:
      utils.addToConfig('/* #undef %s */' % func[1], TOP_SRC_DIR)

  if conf.CheckFunc('fcntl'):
    utils.addToConfig('#define HAVE_FCNTL 1', TOP_SRC_DIR)
    env['HAVE_FCNTL'] = True
  else:
    utils.addToConfig('/* #undef HAVE_FCNTL */', TOP_SRC_DIR)
    env['HAVE_FCNTL'] = False

  # PACKAGE
  # PACKAGE_VERSION
  # DEVEL_VERSION
  utils.addToConfig('#define PACKAGE "%s"' % PACKAGE, TOP_SRC_DIR)
  utils.addToConfig('#define PACKAGE_VERSION "%s"' % PACKAGE_VERSION, TOP_SRC_DIR)
  if DEVEL_VERSION:
    utils.addToConfig('#define DEVEL_VERSION 1', TOP_SRC_DIR)

  # ENABLE_ASSERTIONS
  # ENABLE_NLS
  # WITH_WARNINGS
  # _GLIBCXX_CONCEPT_CHECKS

  # items are (ENV, ARGUMENTS)
  values = [
    ('ENABLE_ASSERTIONS', 'assertions'),
    ('ENABLE_NLS', 'nls'),
    ('WITH_WARNINGS', 'warnings'),
    ('_GLIBCXX_CONCEPT_CHECKS', 'concept_checks'),
  ]

  for val in values:
    if (env.has_key(val[0]) and env[val[0]]) or \
        ARGUMENTS.get(val[1]):
      utils.addToConfig('#define %s 1' % val[0], TOP_SRC_DIR)
    else:
      utils.addToConfig('/* #undef %s */' % val[0], TOP_SRC_DIR)


  env['EXTRA_LIBS'] = []
  # HAVE_LIBAIKSAURUS
  # AIKSAURUS_H_LOCATION
  if conf.CheckLib('Aiksaurus'):
    utils.addToConfig("#define HAVE_LIBAIKSAURUS 1", TOP_SRC_DIR)
    if (conf.CheckCXXHeader("Aiksaurus.h")):
      utils.addToConfig("#define AIKSAURUS_H_LOCATION <Aiksaurus.h>", TOP_SRC_DIR)
    elif (conf.CheckCXXHeader("Aiksaurus/Aiksaurus.h")):
      utils.addToConfig("#define AIKSAURUS_H_LOCATION <Aiksaurus/Aiksaurus.h>", TOP_SRC_DIR)
    else:
      utils.addToConfig("#define AIKSAURUS_H_LOCATION", TOP_SRC_DIR)
    env['EXTRA_LIBS'].append('Aiksaurus')

  # USE_ASPELL
  # USE_PSPELL
  # USE_ISPELL

  # determine headers to use
  spell_engine = ARGUMENTS.get('spell', 'auto')
  spell_detected = False
  if spell_engine in ['auto', 'aspell'] and \
    conf.CheckLib('aspell'):
    utils.addToConfig('#define USE_ASPELL 1', TOP_SRC_DIR)
    env['USE_ASPELL'] = True
    env['USE_PSPELL'] = False
    env['USE_ISPELL'] = False
    env['EXTRA_LIBS'].append('aspell')
    spell_detected = True
  elif spell_engine in ['auto', 'pspell'] and \
    conf.CheckLib('pspell'):
    utils.addToConfig('#define USE_PSPELL 1', TOP_SRC_DIR)
    env['USE_ASPELL'] = False
    env['USE_PSPELL'] = True
    env['USE_ISPELL'] = False
    env['EXTRA_LIBS'].append('pspell')
    spell_detected = True
  elif spell_engine in ['auto', 'ispell'] and \
    conf.CheckLib('ispell'):
    utils.addToConfig('#define USE_ISPELL 1', TOP_SRC_DIR)
    env['USE_ASPELL'] = False
    env['USE_PSPELL'] = False
    env['USE_ISPELL'] = True
    env['EXTRA_LIBS'].append('ispell')
    spell_detected = True

  if not spell_detected:
    env['USE_ASPELL'] = False
    env['USE_PSPELL'] = False
    env['USE_ISPELL'] = False
    # FIXME: can lyx work without an spell engine
    if spell_engine == 'auto':
      print "Warning: Can not locate any spell checker"
    else:
      print "Warning: Can not locate specified spell checker:", spell_engine

  # USE_POSIX_PACKAGING
  # USE_MACOSX_PACKAGING
  # USE_WINDOWS_PACKAGING
  if packaging_method == 'windows':
    utils.addToConfig('#define USE_WINDOWS_PACKAGING 1', TOP_SRC_DIR)
  elif packaging_method == 'posix':
    utils.addToConfig('#define USE_POSIX_PACKAGING 1', TOP_SRC_DIR)
  elif packaging_method == 'mac':
    utils.addToConfig('#define USE_MACOSX_PACKAGING 1', TOP_SRC_DIR)

  # BOOST_POSIX
  if boost_posix:
    utils.addToConfig('#define BOOST_POSIX 1', TOP_SRC_DIR)
  else:
    utils.addToConfig('/* #undef BOOST_POSIX */', TOP_SRC_DIR)

  # HAVE_PUTENV
  if conf.CheckPutenv():
    utils.addToConfig('#define HAVE_PUTENV 1', TOP_SRC_DIR)
  else:
    utils.addToConfig('/* #undef HAVE_PUTENV */', TOP_SRC_DIR)

  # HAVE_DECL_ISTREAMBUF_ITERATOR
  if conf.CheckIstreambufIterator():
    utils.addToConfig('#define HAVE_DECL_ISTREAMBUF_ITERATOR 1', TOP_SRC_DIR)
  else:
    utils.addToConfig('/* #undef HAVE_DECL_ISTREAMBUF_ITERATOR */', TOP_SRC_DIR)

  # MKDIR_TAKES_ONE_ARG
  if conf.CheckMkdirOneArg():
    utils.addToConfig('#define MKDIR_TAKES_ONE_ARG 1', TOP_SRC_DIR)
  else:
    utils.addToConfig('/* #undef MKDIR_TAKES_ONE_ARG */', TOP_SRC_DIR)

  # HAVE_STD_COUNT
  if conf.CheckStdCount():
    utils.addToConfig('#define HAVE_STD_COUNT 1', TOP_SRC_DIR)
  else:
    utils.addToConfig('/* #undef HAVE_STD_COUNT */', TOP_SRC_DIR)

  # SELECT_TYPE_ARG1
  # SELECT_TYPE_ARG234
  # SELECT_TYPE_ARG5
  (arg1, arg234, arg5) = conf.CheckSelectArgType()
  utils.addToConfig('#define SELECT_TYPE_ARG1 %s' % arg1, TOP_SRC_DIR)
  utils.addToConfig('#define SELECT_TYPE_ARG234 %s' % arg234, TOP_SRC_DIR)
  utils.addToConfig('#define SELECT_TYPE_ARG5 %s' % arg5, TOP_SRC_DIR)

  # mkstemp
  # USE_BOOST_FORMAT
  # WANT_GETFILEATTRIBUTESEX_WRAPPER
  utils.endConfigH(TOP_SRC_DIR)

  # env['EXTRA_LIBS'] will be modified later, so a unique copy is needed
  # NOTE that we do *not* save qt_libs in environment.
  env_cache['EXTRA_LIBS'] = copy.copy(env['EXTRA_LIBS'])
  env_cache['USE_ASPELL'] = env['USE_ASPELL']
  env_cache['USE_PSPELL'] = env['USE_PSPELL']
  env_cache['USE_ISPELL'] = env['USE_ISPELL']
  env_cache['HAVE_FCNTL'] = env['HAVE_FCNTL']

else:
  #
  # this comes as a big surprise, without this line 
  # (doing nothing obvious), adding fast_start=yes
  # to a build with fast_start=no will result in a rebuild
  # Note that the exact header file to check does not matter
  conf.CheckCHeader('io.h')
  # only a few variables need to be rescanned
  env['EXTRA_LIBS'] = copy.copy(env_cache['EXTRA_LIBS'])
  env['USE_ASPELL'] = env_cache['USE_ASPELL']
  env['USE_PSPELL'] = env_cache['USE_PSPELL']
  env['USE_ISPELL'] = env_cache['USE_ISPELL']
  env['HAVE_FCNTL'] = env_cache['HAVE_FCNTL']

#
# Finish auto-configuration
env = conf.Finish()

#----------------------------------------------------------
# Now set up our build process accordingly
#----------------------------------------------------------

#
# QT_LIB etc (EXTRA_LIBS holds lib for each frontend)
#
# NOTE: Tool('qt') or Tool('qt4') will be loaded later
# in their respective directory and specialized env.
try:
  if frontend == 'qt3':
    # note: env.Tool('qt') my set QT_LIB to qt
    env['QT_LIB'] = 'qt-mt'
    env['EXTRA_LIBS'].append('qt-mt')
    if platform_name == 'cygwin' and use_X11:
      env['EXTRA_LIBS'].extend(['GL',  'Xmu', 'Xi', 'Xrender', 'Xrandr', 'Xcursor',
        'Xft', 'freetype', 'fontconfig', 'Xext', 'X11', 'SM', 'ICE', 'resolv',
        'pthread'])
      env.AppendUnique(LIBPATH = ['/usr/X11R6/lib'])
  elif frontend == 'qt4':
    if platform_name == "win32":
      env['QT_LIB'] = ['QtCore4', 'QtGui4']
    else:
      env['QT_LIB'] = ['QtCore', 'QtGui']
    env['EXTRA_LIBS'] += env['QT_LIB']
except:
  print "Can not locate qt tools"
  print "What I get is "
  print "  QTDIR: ", env['QTDIR']


if platform_name in ['win32', 'cygwin']:
  # the final link step needs stdc++ to succeed under mingw
  # FIXME: shouldn't g++ automatically link to stdc++?
  env['SYSTEM_LIBS'] = ['shlwapi', 'z', 'stdc++']
else:
  env['SYSTEM_LIBS'] = ['z']

#
# Build parameters CPPPATH etc
#
# boost is always in, src is needed for config.h
# 
# QT_INC_PATH is not needed for *every* source file
env['CPPPATH'].remove(env['QT_INC_PATH'])
env['CPPPATH'] += ['$TOP_SRC_DIR/boost', '$TOP_SRC_DIR/src']

# TODO: add (more) appropriate compiling options (-DNDEBUG etc)
# for debug/release mode
if ARGUMENTS.get('mode', default_build_mode) == 'debug':
  env.AppendUnique(CCFLAGS = [])
else:
  env.AppendUnique(CCFLAGS = [])

#
# Customized builders
#
# install customized builders
env['BUILDERS']['substFile'] = Builder(action = utils.env_subst)
# FIXME: there must be a better way.
env['BUILDERS']['fileCopy'] = Builder(action = utils.env_filecopy)

#
# A Link script for cygwin see
# http://www.cygwin.com/ml/cygwin/2004-09/msg01101.html
# http://www.cygwin.com/ml/cygwin-apps/2004-09/msg00309.html
# for details
#
if platform_name == 'cygwin':
  ld_script_path = '/usr/lib/qt3/mkspecs/cygwin-g++'
  ld_script = utils.installCygwinLDScript(ld_script_path)
  env.AppendUnique(LINKFLAGS = ['-Wl,--enable-runtime-pseudo-reloc',
    '-Wl,--script,%s' % ld_script, '-Wl,-s'])

#
# Report results
#
# src/support/package.C.in needs the following to replace
#  LYX_ABS_INSTALLED_DATADIR (e.g. /usr/local/lyx/share/lyx)
env['LYX_DIR'] = env['SHARE_DIR']
#  LYX_ABS_INSTALLED_LOCALEDIR
env['LOCALEDIR'] = env['LOCALE_DIR']
env['TOP_SRCDIR'] = env['TOP_SRC_DIR']
# program suffix
if env.has_key('version_suffix'):
  env['PROGRAM_SUFFIX'] = env['version_suffix']
else:
  env['PROGRAM_SUFFIX'] = ''
# needed by src/version.C.in => src/version.C
env['PACKAGE_VERSION'] = PACKAGE_VERSION
# fill in the version info
env['VERSION_INFO'] = '''Configuration
  Host type:                      %s
  Special build flags:            %s
  C   Compiler:                   %s
  C   Compiler flags:             %s %s
  C++ Compiler:                   %s
  C++ Compiler LyX flags:         %s
  C++ Compiler flags:             %s %s
  Linker flags:                   %s
  Linker user flags:              %s
Build info:
  Builing directory:              %s
  Local library directory:        %s
  Libraries pathes:               %s
  Boost libraries:                %s
  Extra libraries:                %s
  System libraries:               %s
  include search path:            %s
Frontend:
  Frontend:                       %s
  Packaging:                      %s
  LyX dir:                        %s
  LyX binary dir:                 %s
  LyX files dir:                  %s
''' % (platform_name,
  env.subst('$CCFLAGS'), env.subst('$CC'),
  env.subst('$CPPFLAGS'), env.subst('$CFLAGS'),
  env.subst('$CXX'), env.subst('$CXXFLAGS'),
  env.subst('$CPPFLAGS'), env.subst('$CXXFLAGS'),
  env.subst('$LINKFLAGS'), env.subst('$LINKFLAGS'),
  env.subst('$BUILDDIR'), env.subst('$LOCALLIBPATH'),
  str(env['LIBPATH']), str(env['BOOST_LIBRARIES']),
  str(env['EXTRA_LIBS']), str(env['SYSTEM_LIBS']), str(env['CPPPATH']),
  env['frontend'], packaging_method,
  env['PREFIX'], env['BIN_DIR'], env['SHARE_DIR'])

if env['frontend'] in ['qt3', 'qt4']:
  env['VERSION_INFO'] += '''  include dir:                    %s
  library dir:                    %s
  X11:                            %s
''' % (env.subst('$QT_INC_PATH'), env.subst('$QT_LIB_PATH'), use_X11)

if not fast_start:
  print env['VERSION_INFO']

#
# Mingw command line may be too short for our link usage,
# Here we use a trick from scons wiki
# http://www.scons.org/cgi-sys/cgiwrap/scons/moin.cgi/LongCmdLinesOnWin32
#
# I also would like to add logging (commands only) capacity to the
# spawn system.
logfile = env.get('logfile', default_log_file)
if logfile != '' or platform_name == 'win32':
  import time
  utils.setLoggedSpawn(env, logfile, longarg = (platform_name == 'win32'),
    info = '''# This is a log of commands used by scons to build lyx
# Time: %s
# Command: %s
# Info: %s
''' % (time.asctime(), ' '.join(sys.argv),
  env['VERSION_INFO'].replace('\n','\n# ')) )


#
# Cleanup stuff
#
# -h will print out help info
Help(opts.GenerateHelpText(env))
# save environment settings (for fast_start option)
cache_file = open(env_cache_file, 'w')
cPickle.dump(env_cache, cache_file)
cache_file.close()

#----------------------------------------------------------
# Start building
#----------------------------------------------------------
Export('env')

# this has been the source of problems on some platforms...
# I find that I need to supply it with full path name
env.SConsignFile(os.path.join(Dir(env['BUILDDIR']).abspath, '.sconsign'))
# this usage needs further investigation.
#env.CacheDir('%s/Cache/%s' % (env['BUILDDIR'], frontend))

env['BUILD_TARGETS'] = BUILD_TARGETS

print "Building all targets recursively"

env.SConscript('$SCONS_DIR/SConscript', duplicate = 0)