"""SCons.Tool.aixlink

Tool-specific initialization for the IBM Visual Age linker.

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.
"""

#
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__revision__ = "src/engine/SCons/Tool/aixlink.py  2014/07/05 09:42:21 garyo"

import os
import os.path

import SCons.Util

import link

cplusplus = __import__('c++', globals(), locals(), [])

def smart_linkflags(source, target, env, for_signature):
    if cplusplus.iscplusplus(source):
        build_dir = env.subst('$BUILDDIR', target=target, source=source)
        if build_dir:
            return '-qtempinc=' + os.path.join(build_dir, 'tempinc')
    return ''

def generate(env):
    """
    Add Builders and construction variables for Visual Age linker to
    an Environment.
    """
    link.generate(env)

    env['SMARTLINKFLAGS'] = smart_linkflags
    env['LINKFLAGS']      = SCons.Util.CLVar('$SMARTLINKFLAGS')
    env['SHLINKFLAGS']    = SCons.Util.CLVar('$LINKFLAGS -qmkshrobj -qsuppress=1501-218')
    env['SHLIBSUFFIX']    = '.a'

def exists(env):
    # TODO: sync with link.smart_link() to choose a linker
    linkers = { 'CXX': ['aixc++'], 'CC': ['aixcc'] }
    alltools = []
    for langvar, linktools in linkers.items():
        if langvar in env: # use CC over CXX when user specified CC but not CXX
            return SCons.Tool.FindTool(linktools, env)
        alltools.extend(linktools)
    return SCons.Tool.FindTool(alltools, env)

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