1 <!DOCTYPE html> 2 3 <html> 4 <head> 5 <h2>Change List</h2> 6 <h3>Android NDK, Revision 10d</a> <em>(December 2014)</em></h3> 7 </p> 8 <dt>Important changes:</dt> 9 <dd> 10 <ul> 11 <li>Made GCC 4.8 the default for all 32-bit ABIs. Deprecated GCC 4.6, and 12 will remove it next release. To restore previous behavior, either add 13 <code>NDK_TOOLCHAIN_VERSION=4.6</code> to ndk-build, or 14 add <code>--toolchain=arm-linux-androideabi-4.6</code> when executing 15 <code>make-standalone-toolchain.sh</code> on the command line. GCC 4.9 remains the 16 default for 64-bit ABIs.</li> 17 18 <li>Stopped all x86[_64] toolchains from adding <code>-mstackrealign</code> by default. The 19 NDK toolchain assumes a 16-byte stack alignment. The tools and options used by default 20 enforce this rule. A user writing assembly code must make sure to preserve stack 21 alignment, and ensure that other compilers also comply with this rule. 22 (GCC bug <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38496">38496</a>)</li> 23 24 <li>Added Address Sanitizer functionality to Clang 3.5 support to the ARM and x86 ABIs. 25 More information on this change is available 26 <a href="https://code.google.com/p/address-sanitizer/wiki/Android">here</a>.</li> 27 28 <li>Introduced the requirement, starting from API level 21, to use <code>-fPIE -pie 29 </code> when building. In API levels 16 and higher, ndk-build uses <code>PIE</code> 30 when building. This change has a number of implications, which are discussed 31 <a href="https://code.google.com/p/android-developer-preview/issues/detail?id=888">here</a>. 32 These implications do not apply to shared libraries.</li> 33 </ul> 34 </dd> 35 36 37 38 <dt>Important bug fixes:</dt> 39 <dd> 40 <ul> 41 <li>Made more fixes related to 42 <a href="https://gcc.gnu.org/ml/gcc-patches/2014-10/msg00906.html"> 43 A53 Errata #835769</a> in the aarch64-linux-android-4.9 linker. As part of this, GCC 44 passes a new option, <code>--fix-cortex-a53-835769</code>, when 45 <code>-mfix-cortex-a53-835769</code> (enabled by default) is specified. 46 For more information, see 47 <a href="https://sourceware.org/ml/binutils/2014-10/msg00198.html">this page</a> and 48 <a href="https://sourceware.org/ml/binutils/2014-11/msg00287.html">this page</a></li> 49 50 <li>Documented a fix to a libc++ <code>sscanf/vsscanf</code> hang that occurred in API level 51 21. The fix itself had been implemented in r10c. 52 (Issue <a href="http://b.android.com/77988">77988</a>)</li> 53 54 <li>Fixed an AutoFDO (<code>-fauto-profile</code>) crash that occurred with GCC 4.9 when 55 <code>-Os</code> was specified. (Issue <a href="http://b.android.com/77571">77571</a>)</li> 56 </ul> 57 </dd> 58 59 60 <dt>Other bug fixes:</dt> 61 <dd> 62 <ul> 63 <li>Made the following header and library fixes:</li> 64 <ul> 65 <li>Added <code>posix_memalign</code> to API level 16. Also, added a prototype in 66 <code>stdlib.h</code> to API levels 16 to 19. 67 (Issue <a href="http://b.android.com/77861">77861</a>.)</li> 68 <li>Fixed <code>stdatomic.h</code> so that it includes <code><atomic></code> only for 69 C++11.</li> 70 <li>Modified the following headers for standalone use: <code>sys/user.h</code>, and 71 <code>gl2ext.h</code>, <code>dlext.h</code>, <code>fts.h</code>, <code>sgidefs.h</code> 72 for API level 21.</li> 73 <li>Modified <code>sys/user.h</code> to rename <code>mxcsr_mask</code> as <code>mxcr_mask</code>, 74 and to change the data type for <code>u_ar0</code></li> from <code>unsigned long</code> 75 to </code>struct user_regs_struct*</code>. 76 <li>Changed <code>sysconf()</code> return value type from <code>int</code> to 77 <code>long</code>.</li> 78 </ul> 79 80 <li>Fixed ndk-build's handling of <code>thumb</code> for <code>LOCAL_ARM_MODE</code>: In 81 r10d, ndk-build adds <code>LOCAL_LDFLAGS+=-mthumb</code> by default, unless one of the 82 following conditions applies:</li> 83 <ul> 84 <li><code>LOCAL_ARM_MODE</code> has been set equal to <code>arm</code>.</li> 85 <li>You are doing a debug build (with settings such as <code>APP_OPTIM=debug</code> and 86 <code>AndroidManifest.xml</code> containing <code>android:debuggable="true"</code>), 87 where ARM mode is the default in order to retain compatibility with earlier toolchains. 88 (Issue <a href="http://b.android.com/74040">74040</a>)</li> 89 </ul> 90 91 <li>Fixed <code>LOCAL_SRC_FILES</code> in ndk-build to use Windows absolute paths. 92 (Issue <a href="http://b.android.com/74333">74333</a>)</li> 93 94 <li>Removed bash-specific code from ndk-gdb. (Issue <a href="http://b.android.com/73338">73338</a>)</li> 95 96 <li>Removed bash-specific code from <code>make-standalone-toolchain.sh</code>. 97 (Issue <a href="http://b.android.com/74145">74145)</a></li> 98 99 <li>Revised documentation concerning a fix for <code>System.loadLibrary()</code> transitive 100 dependencies. (Issue <a href="http://b.android.com/41790">41790</a>)</li> 101 102 <li>Fixed a problem that was preventing 64-bit packages from extracting on Ubuntu 14.04 and 103 OS X 10.10 (Yosemite). (Issue <a href="http://b.android.com/78148">78148</a>)</li> 104 105 <li>Fixed an issue with <code>LOCAL_PCH</code> to improve Clang support. (Issue 106 <a href="http://b.android.com/77575">77575</a>)</li> 107 108 <li>Clarified "requires executable stack" warning from ld.gold. (Issue 109 <a href="http://b.android.com/79115">79115</a>)</li> 110 </ul> 111 </dd> 112 113 114 115 A comprehensive change list, going through all previous releases of the NDK, can be found at the <a href="http://developer.android.com/tools/sdk/ndk/index.html">Android developer website.</a><br> 116 <br> 117 118 <div id="copyright"> 119 120 Except as noted, this content is 121 licensed under <a href="http://creativecommons.org/licenses/by/2.5/"> 122 Creative Commons Attribution 2.5</a>. For details and 123 restrictions, see the <a href="http://developer.android.com/license.html">Content 124 License</a>. 125 <div id="footerlinks"> 126 127 <p> 128 <a href="http://developer.android.com/about/index.html">About Android</a> | 129 <a href="http://developer.android.com/legal.html">Legal</a> | 130 <a href="http://developer.android.com/support.html">Support</a> 131 </p> 132 </div> 133 </div> 134 </body> 135 </html> 136
