Source code for SCons.Platform.aix

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# Copyright The SCons Foundation
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"""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.
"""

from subprocess import PIPE

from . import posix

import SCons.Util
import SCons.Action

def get_xlc(env, xlc=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 SCons.Util.is_List(xlc):
        xlc = xlc[0]
    for package in packages:
        # find the installed filename, which may be a symlink as well
        cp = SCons.Action.scons_subproc_run(
            env, ['lslpp', '-fc', package], universal_newlines=True, stdout=PIPE
        )
        # output of lslpp is something like this:
        #     #Path:Fileset:File
        #     /usr/lib/objrepos:vac.C 6.0.0.0:/usr/vac/exe/xlCcpp
        #     /usr/lib/objrepos:vac.C 6.0.0.0:/usr/vac/bin/xlc_r -> /usr/vac/bin/xlc
        for line in cp.stdout.splitlines():
            if xlcPath:
                continue  # read everything to let lslpp terminate
            fileset, filename = line.split(':')[1:3]
            filename = filename.split()[0]
            if ('/' in xlc and filename == xlc) or (
                '/' not in xlc and filename.endswith('/' + xlc)
            ):
                xlcVersion = fileset.split()[1]
                xlcPath, sep, xlc = filename.rpartition('/')
    return (xlcPath, xlc, xlcVersion)

def generate(env) -> None:
    posix.generate(env)
    #Based on AIX 5.2: ARG_MAX=24576 - 3000 for environment expansion
    env['MAXLINELENGTH']  = 21576
    env['SHLIBSUFFIX'] = '.a'
    env['HOST_OS'] = 'aix'

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