SV platform dependency builds

import sys, os.path

def rsplit(toSplit, sub, max=-1):

    """ str.rsplit seems to have been introduced in 2.4 :( """

    l = []

    i = 0

    while i != max:

        try: idx = toSplit.rindex(sub)

        except ValueError: break

        toSplit, splitOff = toSplit[:idx], toSplit[idx + len(sub):]

        l.insert(0, splitOff)

        i += 1

    l.insert(0, toSplit)

    return l

sconsDir = os.path.join("build", "scons")

SConscript(os.path.join(sconsDir, "SConscript_common"))

Import("Platform", "Posix", "ApiVer")

# SConscript_opts exports PortAudio options

optsDict = SConscript(os.path.join(sconsDir, "SConscript_opts"))

optionsCache = os.path.join(sconsDir, "options.cache")   # Save options between runs in this cache

options = Options(optionsCache, args=ARGUMENTS)

for k in ("Installation Dirs", "Build Targets", "Host APIs", "Build Parameters", "Bindings"):

    options.AddOptions(*optsDict[k])

# Propagate options into environment

env = Environment(options=options)

# Save options for next run

options.Save(optionsCache, env)

# Generate help text for options

env.Help(options.GenerateHelpText(env))

buildDir = os.path.join("#", sconsDir, env["PLATFORM"])

# Determine parameters to build tools

if Platform in Posix:

    threadCFlags = ''

    if Platform != 'darwin':

        threadCFlags = "-pthread "

    baseLinkFlags = threadCFlags

    baseCxxFlags = baseCFlags = "-Wall -pedantic -pipe " + threadCFlags

    debugCxxFlags = debugCFlags = "-g"

    optCxxFlags = optCFlags  = "-O2"

env.Append(CCFLAGS = baseCFlags)

env.Append(CXXFLAGS = baseCxxFlags)

env.Append(LINKFLAGS = baseLinkFlags)

if env["enableDebug"]:

    env.AppendUnique(CCFLAGS=debugCFlags.split())

    env.AppendUnique(CXXFLAGS=debugCxxFlags.split())

if env["enableOptimize"]:

    env.AppendUnique(CCFLAGS=optCFlags.split())

    env.AppendUnique(CXXFLAGS=optCxxFlags.split())

if not env["enableAsserts"]:

    env.AppendUnique(CPPDEFINES=["-DNDEBUG"])

if env["customCFlags"]:

    env.Append(CCFLAGS=Split(env["customCFlags"]))

if env["customCxxFlags"]:

    env.Append(CXXFLAGS=Split(env["customCxxFlags"]))

if env["customLinkFlags"]:

    env.Append(LINKFLAGS=Split(env["customLinkFlags"]))

env.Append(CPPPATH=[os.path.join("#", "include"), "common"])

# Store all signatures in one file, otherwise .sconsign files will get installed along with our own files

env.SConsignFile(os.path.join(sconsDir, ".sconsign"))

env.SConscriptChdir(False)

sources, sharedLib, staticLib, tests, portEnv, hostApis = env.SConscript(os.path.join("src", "SConscript"),

        build_dir=buildDir, duplicate=False, exports=["env"])

if Platform in Posix:

    prefix = env["prefix"]

    includeDir = os.path.join(prefix, "include")

    libDir = os.path.join(prefix, "lib")

    env.Alias("install", includeDir)

    env.Alias("install", libDir)

    # pkg-config

    def installPkgconfig(env, target, source):

        tgt = str(target[0])

        src = str(source[0])

        f = open(src)

        try: txt = f.read()

        finally: f.close()

        txt = txt.replace("@prefix@", prefix)

        txt = txt.replace("@exec_prefix@", prefix)

        txt = txt.replace("@libdir@", libDir)

        txt = txt.replace("@includedir@", includeDir)

        txt = txt.replace("@LIBS@", " ".join(["-l%s" % l for l in portEnv["LIBS"]]))

        txt = txt.replace("@THREAD_CFLAGS@", threadCFlags)

        f = open(tgt, "w")

        try: f.write(txt)

        finally: f.close()

    pkgconfigTgt = "portaudio-%d.0.pc" % int(ApiVer.split(".", 1)[0])

    env.Command(os.path.join(libDir, "pkgconfig", pkgconfigTgt),

        os.path.join("#", pkgconfigTgt + ".in"), installPkgconfig)

# Default to None, since if the user disables all targets and no Default is set, all targets

# are built by default

env.Default(None)

if env["enableTests"]:

    env.Default(tests)

if env["enableShared"]:

    env.Default(sharedLib)

    if Platform in Posix:

        def symlink(env, target, source):

            trgt = str(target[0])

            src = str(source[0])

            if os.path.islink(trgt) or os.path.exists(trgt):

                os.remove(trgt)

            os.symlink(os.path.basename(src), trgt)

        major, minor, micro = [int(c) for c in ApiVer.split(".")]

        soFile = "%s.%s" % (os.path.basename(str(sharedLib[0])), ApiVer)

        env.InstallAs(target=os.path.join(libDir, soFile), source=sharedLib)

        # Install symlinks

        symTrgt = os.path.join(libDir, soFile)

        env.Command(os.path.join(libDir, "libportaudio.so.%d.%d" % (major, minor)),

            symTrgt, symlink)

        symTrgt = rsplit(symTrgt, ".", 1)[0]

        env.Command(os.path.join(libDir, "libportaudio.so.%d" % major), symTrgt, symlink)

        symTrgt = rsplit(symTrgt, ".", 1)[0]

        env.Command(os.path.join(libDir, "libportaudio.so"), symTrgt, symlink)

if env["enableStatic"]:

    env.Default(staticLib)

    env.Install(libDir, staticLib)

env.Install(includeDir, os.path.join("include", "portaudio.h"))

if env["enableCxx"]:

    env.SConscriptChdir(True)

    cxxEnv = env.Copy()

    sharedLibs, staticLibs, headers = env.SConscript(os.path.join("bindings", "cpp", "SConscript"),

            exports={"env": cxxEnv, "buildDir": buildDir}, build_dir=os.path.join(buildDir, "portaudiocpp"), duplicate=False)

    if env["enableStatic"]:

        env.Default(staticLibs)

        env.Install(libDir, staticLibs)

    if env["enableShared"]:

        env.Default(sharedLibs)

        env.Install(libDir, sharedLibs)

    env.Install(os.path.join(includeDir, "portaudiocpp"), headers)

# Generate portaudio_config.h header with compile-time definitions of which PA

# back-ends are available, and which includes back-end extension headers

# Host-specific headers

hostApiHeaders = {"ALSA": "pa_linux_alsa.h",

                    "ASIO": "pa_asio.h",

                    "COREAUDIO": "pa_mac_core.h",

                    "JACK": "pa_jack.h",

                    "WMME": "pa_winwmme.h",

                    }

def buildConfigH(target, source, env):

    """builder for portaudio_config.h"""

    global hostApiHeaders, hostApis

    out = ""

    for hostApi in hostApis:

        out += "#define PA_HAVE_%s\n" % hostApi

        hostApiSpecificHeader = hostApiHeaders.get(hostApi, None)

        if hostApiSpecificHeader:

            out += "#include \"%s\"\n" % hostApiSpecificHeader

        out += "\n"

    # Strip the last newline

    if out and out[-1] == "\n":

        out = out[:-1]

    f = file(str(target[0]), 'w')

    try: f.write(out)

    finally: f.close()

    return 0

# Define the builder for the config header

env.Append(BUILDERS={"portaudioConfig": env.Builder(

            action=Action(buildConfigH), target_factory=env.fs.File)})

confH = env.portaudioConfig(File("portaudio_config.h", "include"),

        File("portaudio.h", "include"))

env.Default(confH)

env.Install(os.path.join(includeDir, "portaudio"), confH)

for api in hostApis:

    if api in hostApiHeaders:

        env.Install(os.path.join(includeDir, "portaudio"),

                File(hostApiHeaders[api], "include"))