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"""SCons.Tool.gcc

Tool-specific initialization for MinGW (http://www.mingw.org/)

There normally shouldn't be any need to import this module directly.

It will usually be imported through the generic SCons.Tool.Tool()

selection method.

See also http://www.scons.org/wiki/CrossCompilingMingw

"""

#

# Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation

#

# Permission is hereby granted, free of charge, to any person obtaining

# a copy of this software and associated documentation files (the

# "Software"), to deal in the Software without restriction, including

# without limitation the rights to use, copy, modify, merge, publish,

# distribute, sublicense, and/or sell copies of the Software, and to

# permit persons to whom the Software is furnished to do so, subject to

# the following conditions:

#

# The above copyright notice and this permission notice shall be included

# in all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY

# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#

import os

import os.path

import string

import SCons.Action

import SCons.Builder

import SCons.Tool

import SCons.Util

# This is what we search for to find mingw:

prefixes32 = SCons.Util.Split("""

    mingw32-

    mingw32msvc-

    i386-mingw32-

    i486-mingw32-

    i586-mingw32-

    i686-mingw32-

    i386-mingw32msvc-

    i486-mingw32msvc-

    i586-mingw32msvc-

    i686-mingw32msvc-

    i686-pc-mingw32-

    i686-w64-mingw32-

""")

prefixes64 = SCons.Util.Split("""

    x86_64-w64-mingw32-

    amd64-mingw32-

    amd64-mingw32msvc-

    amd64-pc-mingw32-

""")

def find(env):

    if env['machine'] == 'x86_64':

        prefixes = prefixes64

    else:

        prefixes = prefixes32

    for prefix in prefixes:

        # First search in the SCons path and then the OS path:

        if env.WhereIs(prefix + 'gcc') or SCons.Util.WhereIs(prefix + 'gcc'):

            return prefix

    return ''

def shlib_generator(target, source, env, for_signature):

    cmd = SCons.Util.CLVar(['$SHLINK', '$SHLINKFLAGS'])

    dll = env.FindIxes(target, 'SHLIBPREFIX', 'SHLIBSUFFIX')

    if dll: cmd.extend(['-o', dll])

    cmd.extend(['$SOURCES', '$_LIBDIRFLAGS', '$_LIBFLAGS'])

    implib = env.FindIxes(target, 'LIBPREFIX', 'LIBSUFFIX')

    if implib: cmd.append('-Wl,--out-implib,'+implib.get_string(for_signature))

    def_target = env.FindIxes(target, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')

    if def_target: cmd.append('-Wl,--output-def,'+def_target.get_string(for_signature))

    return [cmd]

def shlib_emitter(target, source, env):

    dll = env.FindIxes(target, 'SHLIBPREFIX', 'SHLIBSUFFIX')

    no_import_lib = env.get('no_import_lib', 0)

    if not dll:

        raise SCons.Errors.UserError, "A shared library should have exactly one target with the suffix: %s" % env.subst("$SHLIBSUFFIX")

    if not no_import_lib and \

       not env.FindIxes(target, 'LIBPREFIX', 'LIBSUFFIX'):

        # Append an import library to the list of targets.

        target.append(env.ReplaceIxes(dll,

                                      'SHLIBPREFIX', 'SHLIBSUFFIX',

                                      'LIBPREFIX', 'LIBSUFFIX'))

    # Append a def file target if there isn't already a def file target

    # or a def file source. There is no option to disable def file

    # target emitting, because I can't figure out why someone would ever

    # want to turn it off.

    def_source = env.FindIxes(source, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')

    def_target = env.FindIxes(target, 'WIN32DEFPREFIX', 'WIN32DEFSUFFIX')

    if not def_source and not def_target:

        target.append(env.ReplaceIxes(dll,

                                      'SHLIBPREFIX', 'SHLIBSUFFIX',

                                      'WIN32DEFPREFIX', 'WIN32DEFSUFFIX'))

    return (target, source)

shlib_action = SCons.Action.Action(shlib_generator, '$SHLINKCOMSTR', generator=1)

res_action = SCons.Action.Action('$RCCOM', '$RCCOMSTR')

res_builder = SCons.Builder.Builder(action=res_action, suffix='.o',

                                    source_scanner=SCons.Tool.SourceFileScanner)

SCons.Tool.SourceFileScanner.add_scanner('.rc', SCons.Defaults.CScan)

def generate(env):

    mingw_prefix = find(env)

    if mingw_prefix:

        dir = os.path.dirname(env.WhereIs(mingw_prefix + 'gcc') or SCons.Util.WhereIs(mingw_prefix + 'gcc'))

        # The mingw bin directory must be added to the path:

        path = env['ENV'].get('PATH', [])

        if not path:

            path = []

        if SCons.Util.is_String(path):

            path = string.split(path, os.pathsep)

        env['ENV']['PATH'] = string.join([dir] + path, os.pathsep)

    # Most of mingw is the same as gcc and friends...

    gnu_tools = ['gcc', 'g++', 'gnulink', 'ar', 'gas']

    for tool in gnu_tools:

        SCons.Tool.Tool(tool)(env)

    #... but a few things differ:

    env['CC'] = mingw_prefix + 'gcc'

    env['SHCCFLAGS'] = SCons.Util.CLVar('$CCFLAGS')

    env['CXX'] = mingw_prefix + 'g++'

    env['SHCXXFLAGS'] = SCons.Util.CLVar('$CXXFLAGS')

    env['SHLINKFLAGS'] = SCons.Util.CLVar('$LINKFLAGS -shared')

    env['SHLINKCOM']   = shlib_action

    env.Append(SHLIBEMITTER = [shlib_emitter])

    env['LINK'] = mingw_prefix + 'g++'

    env['AR'] = mingw_prefix + 'ar'

    env['RANLIB'] = mingw_prefix + 'ranlib'

    env['LINK'] = mingw_prefix + 'g++'

    env['AS'] = mingw_prefix + 'as'

    env['WIN32DEFPREFIX']        = ''

    env['WIN32DEFSUFFIX']        = '.def'

    env['SHOBJSUFFIX'] = '.o'

    env['STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME'] = 1

    env['RC'] = mingw_prefix + 'windres'

    env['RCFLAGS'] = SCons.Util.CLVar('')

    env['RCCOM'] = '$RC $_CPPDEFFLAGS $_CPPINCFLAGS ${INCPREFIX}${SOURCE.dir} $RCFLAGS -i $SOURCE -o $TARGET'

    env['BUILDERS']['RES'] = res_builder

    # Some setting from the platform also have to be overridden:

    env['OBJPREFIX']      = ''

    env['OBJSUFFIX']      = '.o'

    env['SHOBJPREFIX']    = '$OBJPREFIX'

    env['SHOBJSUFFIX']    = '$OBJSUFFIX'

    env['PROGPREFIX']     = ''

    env['PROGSUFFIX']     = '.exe'

    env['LIBPREFIX']      = 'lib'

    env['LIBSUFFIX']      = '.a'

    env['SHLIBPREFIX']    = ''

    env['SHLIBSUFFIX']    = '.dll'

    env['LIBPREFIXES']    = [ 'lib', '' ]

    env['LIBSUFFIXES']    = [ '.a', '.lib' ]

def exists(env):

    return find(env)