| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- Copyright (C) 1988-2015 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being "Funding Free Software", the Front-Cover |
| Texts being (a) (see below), and with the Back-Cover Texts being (b) |
| (see below). A copy of the license is included in the section entitled |
| "GNU Free Documentation License". |
| |
| (a) The FSF's Front-Cover Text is: |
| |
| A GNU Manual |
| |
| (b) The FSF's Back-Cover Text is: |
| |
| You have freedom to copy and modify this GNU Manual, like GNU |
| software. Copies published by the Free Software Foundation raise |
| funds for GNU development. --> |
| <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>GNU Compiler Collection (GCC) Internals: Internal flags</title> |
| |
| <meta name="description" content="GNU Compiler Collection (GCC) Internals: Internal flags"> |
| <meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Internal flags"> |
| <meta name="resource-type" content="document"> |
| <meta name="distribution" content="global"> |
| <meta name="Generator" content="makeinfo"> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> |
| <link href="index.html#Top" rel="start" title="Top"> |
| <link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> |
| <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> |
| <link href="LTO.html#LTO" rel="up" title="LTO"> |
| <link href="Funding.html#Funding" rel="next" title="Funding"> |
| <link href="WHOPR.html#WHOPR" rel="prev" title="WHOPR"> |
| <style type="text/css"> |
| <!-- |
| a.summary-letter {text-decoration: none} |
| blockquote.smallquotation {font-size: smaller} |
| div.display {margin-left: 3.2em} |
| div.example {margin-left: 3.2em} |
| div.indentedblock {margin-left: 3.2em} |
| div.lisp {margin-left: 3.2em} |
| div.smalldisplay {margin-left: 3.2em} |
| div.smallexample {margin-left: 3.2em} |
| div.smallindentedblock {margin-left: 3.2em; font-size: smaller} |
| div.smalllisp {margin-left: 3.2em} |
| kbd {font-style:oblique} |
| pre.display {font-family: inherit} |
| pre.format {font-family: inherit} |
| pre.menu-comment {font-family: serif} |
| pre.menu-preformatted {font-family: serif} |
| pre.smalldisplay {font-family: inherit; font-size: smaller} |
| pre.smallexample {font-size: smaller} |
| pre.smallformat {font-family: inherit; font-size: smaller} |
| pre.smalllisp {font-size: smaller} |
| span.nocodebreak {white-space:nowrap} |
| span.nolinebreak {white-space:nowrap} |
| span.roman {font-family:serif; font-weight:normal} |
| span.sansserif {font-family:sans-serif; font-weight:normal} |
| ul.no-bullet {list-style: none} |
| --> |
| </style> |
| |
| |
| </head> |
| |
| <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> |
| <a name="Internal-flags"></a> |
| <div class="header"> |
| <p> |
| 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> |
| </div> |
| <hr> |
| <a name="Internal-flags-controlling-lto1"></a> |
| <h3 class="section">24.5 Internal flags controlling <code>lto1</code></h3> |
| |
| <p>The following flags are passed into <code>lto1</code> and are not |
| meant to be used directly from the command line. |
| </p> |
| <ul> |
| <li> -fwpa |
| <a name="index-fwpa"></a> |
| This option runs the serial part of the link-time optimizer |
| performing the inter-procedural propagation (WPA mode). The |
| compiler reads in summary information from all inputs and |
| performs an analysis based on summary information only. It |
| generates object files for subsequent runs of the link-time |
| optimizer where individual object files are optimized using both |
| summary information from the WPA mode and the actual function |
| bodies. It then drives the LTRANS phase. |
| |
| </li><li> -fltrans |
| <a name="index-fltrans"></a> |
| This option runs the link-time optimizer in the |
| local-transformation (LTRANS) mode, which reads in output from a |
| previous run of the LTO in WPA mode. In the LTRANS mode, LTO |
| optimizes an object and produces the final assembly. |
| |
| </li><li> -fltrans-output-list=<var>file</var> |
| <a name="index-fltrans_002doutput_002dlist"></a> |
| This option specifies a file to which the names of LTRANS output |
| files are written. This option is only meaningful in conjunction |
| with <samp>-fwpa</samp>. |
| |
| </li><li> -fresolution=<var>file</var> |
| <a name="index-fresolution"></a> |
| This option specifies the linker resolution file. This option is |
| only meaningful in conjunction with <samp>-fwpa</samp> and as option |
| to pass through to the LTO linker plugin. |
| </li></ul> |
| |
| |
| |
| |
| </body> |
| </html> |
