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119 lines
4.7 KiB
HTML
119 lines
4.7 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Internal flags (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Internal flags (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Internal flags (GNU Compiler Collection (GCC) Internals)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="LTO.html#LTO" rel="up" title="LTO">
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<link href="Match-and-Simplify.html#Match-and-Simplify" rel="next" title="Match and Simplify">
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<link href="WHOPR.html#WHOPR" rel="prev" title="WHOPR">
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</style>
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</head>
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<body lang="en">
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<a name="Internal-flags"></a>
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<div class="header">
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<p>
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Previous: <a href="WHOPR.html#WHOPR" accesskey="p" rel="prev">WHOPR</a>, Up: <a href="LTO.html#LTO" accesskey="u" rel="up">LTO</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Internal-flags-controlling-lto1"></a>
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<h3 class="section">25.5 Internal flags controlling <code>lto1</code></h3>
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<p>The following flags are passed into <code>lto1</code> and are not
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meant to be used directly from the command line.
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</p>
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<ul>
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<li> -fwpa
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<a name="index-fwpa"></a>
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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><li> -fltrans
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<a name="index-fltrans"></a>
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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><li> -fltrans-output-list=<var>file</var>
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<a name="index-fltrans_002doutput_002dlist"></a>
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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>-fwpa</samp>.
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</li><li> -fresolution=<var>file</var>
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<a name="index-fresolution"></a>
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This option specifies the linker resolution file. This option is
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only meaningful in conjunction with <samp>-fwpa</samp> and as option
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to pass through to the LTO linker plugin.
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</li></ul>
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</body>
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</html>
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