scons: Fix old script compatability logic.
Sconscript could be invoked twice if specified in the command line.
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import os
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Import('*')
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# Compatibility with old build scripts:
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#
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if 'mesa' in env['statetrackers']:
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if 'xlib' in env['winsys']:
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SConscript([
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'libgl-xlib/SConscript',
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])
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if 'gdi' in env['winsys']:
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SConscript([
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'libgl-gdi/SConscript',
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])
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if 'xlib' in env['winsys'] and 'libgl-xlib' not in env['targets']:
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env['targets'].append('libgl-xlib')
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if 'gdi' in env['winsys'] and 'libgl-gdi' not in env['targets']:
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env['targets'].append('libgl-gdi')
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if not 'graw-xlib' in env['targets'] and not 'graw-null' in env['targets'] and not env['msvc']:
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# XXX: disable until MSVC can link correctly
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