"""engine.SCons.Platform.aix

Platform-specific initialization for IBM AIX systems.

There normally shouldn't be any need to import this module directly.  It
will usually be imported through the generic SCons.Platform.Platform()
selection method.
"""

#
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# The above copyright notice and this permission notice shall be included
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__revision__ = "src/engine/SCons/Platform/aix.py 4043 2009/02/23 09:06:45 scons"

import os
import string

import posix

def get_xlc(env, xlc=None, xlc_r=None, packages=[]):
    # Use the AIX package installer tool lslpp to figure out where a
    # given xl* compiler is installed and what version it is.
    xlcPath = None
    xlcVersion = None

    if xlc is None:
        xlc = env.get('CC', 'xlc')
    if xlc_r is None:
        xlc_r = xlc + '_r'
    for package in packages:
        cmd = "lslpp -fc " + package + " 2>/dev/null | egrep '" + xlc + "([^-_a-zA-Z0-9].*)?$'"
        line = os.popen(cmd).readline()
        if line:
            v, p = string.split(line, ':')[1:3]
            xlcVersion = string.split(v)[1]
            xlcPath = string.split(p)[0]
            xlcPath = xlcPath[:xlcPath.rindex('/')]
            break
    return (xlcPath, xlc, xlc_r, xlcVersion)

def generate(env):
    posix.generate(env)
    #Based on AIX 5.2: ARG_MAX=24576 - 3000 for environment expansion
    env['MAXLINELENGTH']  = 21576

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