SV platform dependency builds

import os.path, sys

def _PackageOption(pkgName, default=1):

    """ Allow user to choose whether a package should be used if available. This results in a commandline option use<Pkgname>,

    where Pkgname is the name of the package with a capitalized first letter.

    @param pkgName: Name of package.

    @param default: The default value for this option ("yes"/"no").

    """

    return BoolOption("use%s" % pkgName[0].upper() + pkgName[1:], "use %s if available" % (pkgName), default)

def _BoolOption(opt, explanation, default=1):

    """ Allow user to enable/disable a certain option. This results in a commandline option enable<Option>, where Option

    is the name of the option with a capitalized first letter.

    @param opt: Name of option.

    @param explanation: Explanation of option.

    @param default: The default value for this option (1/0).

    """

    return BoolOption("enable%s" % opt[0].upper() + opt[1:], explanation, default)

def _EnumOption(opt, explanation, allowedValues, default):

    """ Allow the user to choose among a set of values for an option. This results in a commandline option with<Option>,

    where Option is the name of the option with a capitalized first letter.

    @param opt: The name of the option.

    @param explanation: Explanation of option.

    @param allowedValues: The set of values to choose from.

    @param default: The default value.

    """

    assert default in allowedValues

    return EnumOption("with%s" % opt[0].upper() + opt[1:], explanation, default, allowed_values=allowedValues)

def _DirectoryOption(opt, explanation, default):

    """ Allow the user to configure the location for a certain directory, for instance the prefix. This results in a

    commandline option which is simply the name of this option.

    @param opt: The configurable directory, for instance "prefix".

    @param explanation: Explanation of option.

    @param default: The default value for this option.

    """

    return PathOption(opt, explanation, default)

    # Incompatible with the latest stable SCons

    # return PathOption(path, help, default, PathOption.PathIsDir)

import SCons.Errors

try:

    Import("Platform", "Posix")

except SCons.Errors.UserError:

    # The common objects must be exported first

    SConscript("SConscript_common")

    Import("Platform", "Posix")

# Expose the options as a dictionary of sets of options

opts = {}

if Platform in Posix:

    opts["Installation Dirs"] = [_DirectoryOption("prefix", "installation prefix", "/usr/local")]

elif Platform in Windows:

    if Platform == "cygwin":

        opts["Installation Dirs"] = [_DirectoryOption("prefix", "installation prefix", "/usr/local")]

opts["Build Targets"] = [_BoolOption("shared", "create shared library"), _BoolOption("static", "create static library"),

        _BoolOption("tests", "build test programs")]

apis = []

if Platform in Posix:

    apis.append(_PackageOption("OSS"))

    apis.append(_PackageOption("JACK"))

    apis.append(_PackageOption("ALSA", Platform == "linux"))

    apis.append(_PackageOption("ASIHPI", Platform == "linux"))

    apis.append(_PackageOption("COREAUDIO", Platform == "darwin"))

elif Platform in Windows:

    if Platform == "cygwin":

        apis.append(_EnumOption("winAPI", "Windows API to use", ("wmme", "directx", "asio"), "wmme"))

opts["Host APIs"] = apis

opts["Build Parameters"] = [\

        _BoolOption("debug", "compile with debug symbols"),

        _BoolOption("optimize", "compile with optimization", default=0),

        _BoolOption("asserts", "runtime assertions are helpful for debugging, but can be detrimental to performance",

                default=1),

        _BoolOption("debugOutput", "enable debug output", default=0),

        # _BoolOption("python", "create Python binding"),

        ("customCFlags", "customize compilation of C code", ""),

        ("customCxxFlags", "customize compilation of C++ code", ""),

        ("customLinkFlags", "customize linking", ""),

        ]

opts["Bindings"] = [\

        _BoolOption("cxx", "build Merlijn Blaauw's PA C++ wrapper", default=0)

        ]

Return("opts")