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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  2. <html>
  3. <!-- This file documents the GNU linker LD
  4. (GNU Arm Embedded Toolchain 10-2020-q4-major)
  5. version 2.35.1.
  6. Copyright (C) 1991-2020 Free Software Foundation, Inc.
  7. Permission is granted to copy, distribute and/or modify this document
  8. under the terms of the GNU Free Documentation License, Version 1.3
  9. or any later version published by the Free Software Foundation;
  10. with no Invariant Sections, with no Front-Cover Texts, and with no
  11. Back-Cover Texts. A copy of the license is included in the
  12. section entitled "GNU Free Documentation License". -->
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  14. <head>
  15. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  16. <title>HIDDEN (LD)</title>
  17. <meta name="description" content="HIDDEN (LD)">
  18. <meta name="keywords" content="HIDDEN (LD)">
  19. <meta name="resource-type" content="document">
  20. <meta name="distribution" content="global">
  21. <meta name="Generator" content="makeinfo">
  22. <link href="index.html#Top" rel="start" title="Top">
  23. <link href="LD-Index.html#LD-Index" rel="index" title="LD Index">
  24. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
  25. <link href="Assignments.html#Assignments" rel="up" title="Assignments">
  26. <link href="PROVIDE.html#PROVIDE" rel="next" title="PROVIDE">
  27. <link href="Simple-Assignments.html#Simple-Assignments" rel="prev" title="Simple Assignments">
  28. <style type="text/css">
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  54. </style>
  55. </head>
  56. <body lang="en">
  57. <a name="HIDDEN"></a>
  58. <div class="header">
  59. <p>
  60. Next: <a href="PROVIDE.html#PROVIDE" accesskey="n" rel="next">PROVIDE</a>, Previous: <a href="Simple-Assignments.html#Simple-Assignments" accesskey="p" rel="prev">Simple Assignments</a>, Up: <a href="Assignments.html#Assignments" accesskey="u" rel="up">Assignments</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="LD-Index.html#LD-Index" title="Index" rel="index">Index</a>]</p>
  61. </div>
  62. <hr>
  63. <a name="HIDDEN-1"></a>
  64. <h4 class="subsection">3.5.2 HIDDEN</h4>
  65. <a name="index-HIDDEN"></a>
  66. <p>For ELF targeted ports, define a symbol that will be hidden and won&rsquo;t be
  67. exported. The syntax is <code>HIDDEN(<var>symbol</var> = <var>expression</var>)</code>.
  68. </p>
  69. <p>Here is the example from <a href="Simple-Assignments.html#Simple-Assignments">Simple Assignments</a>, rewritten to use
  70. <code>HIDDEN</code>:
  71. </p>
  72. <div class="smallexample">
  73. <pre class="smallexample">HIDDEN(floating_point = 0);
  74. SECTIONS
  75. {
  76. .text :
  77. {
  78. *(.text)
  79. HIDDEN(_etext = .);
  80. }
  81. HIDDEN(_bdata = (. + 3) &amp; ~ 3);
  82. .data : { *(.data) }
  83. }
  84. </pre></div>
  85. <p>In this case none of the three symbols will be visible outside this module.
  86. </p>
  87. </body>
  88. </html>