am 660b2d97: Merge "docs: NDK r7c Release Notes (RC2)" into ics-mr1

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page.title=Android NDK

<div class="toggleable open">

  <a href="#" onclick="return toggleDiv(this)"><img src=

  "{@docRoot}assets/images/triangle-opened.png" class="toggle-img" height="9px" width="9px">

  Android NDK, Revision 7c</a> <em>(March 2012)</em>

  <div class="toggleme">

    <p>This release of the NDK includes an important fix for Tegra2-based devices, and a few

additional fixes and improvements:</p>

    <dl>

      <dt>Important bug fixes:</dt>

      <dd>

        <ul>

          <li>Fixed GNU STL armeabi-v7a binaries to not crash on non-NEON

  devices. The files provided with NDK r7b were not configured properly,

  resulting in crashes on Tegra2-based devices and others when trying to use

  certain floating-point functions (e.g., {@code cosf}, {@code sinf}, {@code expf}).</li>

        </ul>

      </dd>

      <dt>Important changes:</dt>

      <dd>

        <ul>

          <li>Added support for custom output directories through the {@code NDK_OUT}

  environment variable. When defined, this variable is used to store all

  intermediate generated files, instead of {@code $PROJECT_PATH/obj}. The variable is

  also recognized by {@code ndk-gdb}. </li>

          <li>Added support for building modules with hundreds or even thousands of source

  files by defining {@code LOCAL_SHORT_COMMANDS} to {@code true} in your {@code Android.mk}.

            <p>This change forces the NDK build system to put most linker or archiver options

  into list files, as a work-around for command-line length limitations.

  See {@code docs/ANDROID-MK.html} for details.</p>

          </li>

        </ul>

      </dd>

      <dt>Other bug fixes:</dt>

      <dd>

        <ul>

          <li>Fixed {@code android_getCpuCount()} implementation in the {@code cpufeatures}

helper library. On certain devices, where cores are enabled dynamically by the system, the previous

implementation would report the total number of <em>active</em> cores the first time the function

was called, rather than the total number of <em>physically available</em> cores.</li>

        </ul>

      </dd>

    </dl>

  </div>

</div>

<div class="toggleable closed">

  <a href="#" onclick="return toggleDiv(this)"><img src=

  "{@docRoot}assets/images/triangle-closed.png" class="toggle-img" height="9px" width="9px">

  Android NDK, Revision 7b</a> <em>(February 2012)</em>

  <div class="toggleme">

      <span style="display:none" class="zh-TW"></span>

    </span>

    <ul>

      <li><a href="<?cs var:toroot ?>sdk/ndk/index.html">Android NDK, r7b</a>

      <li><a href="<?cs var:toroot ?>sdk/ndk/index.html">Android NDK, r7c</a>

        <span class="new">new!</span>

        </li>

      <li><a href="<?cs var:toroot ?>sdk/ndk/overview.html">What is the NDK?</a></li>

    </ul>