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88 lines
4.5 KiB
HTML
88 lines
4.5 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>i960 - Untitled</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Untitled">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Machine-Dependent.html#Machine-Dependent" title="Machine Dependent">
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<link rel="prev" href="H8_002f300.html#H8_002f300" title="H8/300">
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<link rel="next" href="M68HC11_002f68HC12.html#M68HC11_002f68HC12" title="M68HC11/68HC12">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU linker LD
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(GNU Binutils)
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version 2.26.
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Copyright (C) 1991-2015 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
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.-->
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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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pre.smallexample { font-size:smaller }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family:serif; font-weight:normal; }
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span.sansserif { font-family:sans-serif; font-weight:normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="i960"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="M68HC11_002f68HC12.html#M68HC11_002f68HC12">M68HC11/68HC12</a>,
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Previous: <a rel="previous" accesskey="p" href="H8_002f300.html#H8_002f300">H8/300</a>,
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Up: <a rel="up" accesskey="u" href="Machine-Dependent.html#Machine-Dependent">Machine Dependent</a>
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<hr>
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</div>
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<h3 class="section">4.2 <samp><span class="command">ld</span></samp> and the Intel 960 Family</h3>
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<p><a name="index-i960-support-597"></a>
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You can use the ‘<samp><span class="samp">-A</span><var>architecture</var></samp>’ command line option to
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specify one of the two-letter names identifying members of the 960
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family; the option specifies the desired output target, and warns of any
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incompatible instructions in the input files. It also modifies the
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linker's search strategy for archive libraries, to support the use of
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libraries specific to each particular architecture, by including in the
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search loop names suffixed with the string identifying the architecture.
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<p>For example, if your <samp><span class="command">ld</span></samp> command line included ‘<samp><span class="samp">-ACA</span></samp>’<!-- /@w --> as
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well as ‘<samp><span class="samp">-ltry</span></samp>’<!-- /@w -->, the linker would look (in its built-in search
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paths, and in any paths you specify with ‘<samp><span class="samp">-L</span></samp>’) for a library with
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the names
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<pre class="smallexample"> try
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libtry.a
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tryca
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libtryca.a
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</pre>
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<p class="noindent">The first two possibilities would be considered in any event; the last
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two are due to the use of ‘<samp><span class="samp">-ACA</span></samp>’<!-- /@w -->.
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<p>You can meaningfully use ‘<samp><span class="samp">-A</span></samp>’ more than once on a command line, since
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the 960 architecture family allows combination of target architectures; each
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use will add another pair of name variants to search for when ‘<samp><span class="samp">-l</span></samp>’<!-- /@w -->
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specifies a library.
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<p><a name="index-g_t_0040option_007b_002d_002drelax_007d-on-i960-598"></a><a name="index-relaxing-on-i960-599"></a><samp><span class="command">ld</span></samp> supports the ‘<samp><span class="samp">--relax</span></samp>’ option for the i960 family. If
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you specify ‘<samp><span class="samp">--relax</span></samp>’, <samp><span class="command">ld</span></samp> finds all <code>balx</code> and
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<code>calx</code> instructions whose targets are within 24 bits, and turns
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them into 24-bit program-counter relative <code>bal</code> and <code>cal</code>
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instructions, respectively. <samp><span class="command">ld</span></samp> also turns <code>cal</code>
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instructions into <code>bal</code> instructions when it determines that the
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target subroutine is a leaf routine (that is, the target subroutine does
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not itself call any subroutines).
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</body></html>
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