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<a name="Internal-flags"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="WHOPR.html#WHOPR">WHOPR</a>,
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Up: <a rel="up" accesskey="u" href="LTO.html#LTO">LTO</a>
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<h3 class="section">24.5 Internal flags controlling <code>lto1</code></h3>
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<p>The following flags are passed into <samp><span class="command">lto1</span></samp> and are not
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meant to be used directly from the command line.
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<ul>
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<li>-fwpa
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<a name="index-fwpa-5107"></a>This option runs the serial part of the link-time optimizer
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performing the inter-procedural propagation (WPA mode). The
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compiler reads in summary information from all inputs and
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performs an analysis based on summary information only. It
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generates object files for subsequent runs of the link-time
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optimizer where individual object files are optimized using both
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summary information from the WPA mode and the actual function
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bodies. It then drives the LTRANS phase.
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<li>-fltrans
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<a name="index-fltrans-5108"></a>This option runs the link-time optimizer in the
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local-transformation (LTRANS) mode, which reads in output from a
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previous run of the LTO in WPA mode. In the LTRANS mode, LTO
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optimizes an object and produces the final assembly.
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<li>-fltrans-output-list=<var>file</var>
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<a name="index-fltrans_002doutput_002dlist-5109"></a>This option specifies a file to which the names of LTRANS output
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files are written. This option is only meaningful in conjunction
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with <samp><span class="option">-fwpa</span></samp>.
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<li>-fresolution=<var>file</var>
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<a name="index-fresolution-5110"></a>This option specifies the linker resolution file. This option is
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only meaningful in conjunction with <samp><span class="option">-fwpa</span></samp> and as option
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to pass through to the LTO linker plugin.
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</ul>
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