"""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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# permit persons to whom the Software is furnished to do so, subject to
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# The above copyright notice and this permission notice shall be included
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__revision__ = "src/engine/SCons/Tool/aixlink.py rel_2.5.1:3735:9dc6cee5c168 2016/11/03 14:02:02 bdbaddog"

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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