Android compile: The difference between m, mm, mmm, mma, Mmma

<span id="Label3"></p><p><p></p></p><p><p>M: Compiling the entire Android system</p></p><p><p>Makes from the top of the tree</p></p><p><p>Mm: compile the current directory of the module, the current directory needs to have android.mk this makefile file, or go up to the nearest android.mk File.</p></p><p><p>Builds all of the moudles in the current directory</p></p><p><p>Mma: after adding or deleting files in the current directory, you can recompile with MMA.</p></p><p><p>Mmm: compile the module under the specified path, the path specified below needs to have android.mk this makefile file</p></p><p><p>Builds all of the moudles in the supplies directory</p></p><p><p><strong><span style="font-size: 16px">Mmma: after adding or deleting files in the specified directory, you can recompile with MMMA. Not fully compiled, you can use the command to compile the module</span></strong></p></p><p><p>The compilation process of the MMM command:</p></p><p><p>BUILD/CORE/MAIN.MK (is The entry file for Android compilation System)</p></p><p><p>->build/core/config.mk (compile type and target file will be fixed)</p></p><p><p>->BUILD/CORE/DEFINITIONS.MK (defines the macros used during Compilation)</p></p><p><p>                                                        - >one_shot_makefile->build/core/package.mk (compile apk Library File) </p></p><p><p>                                                                                                       ->build/core/java_library.mk (compiling Java library File) </p></p><p><p>                                                                                                      ->build/core/static_java_library.mk (compiling java Static library File) </p></p><p><p>                                                                                                      ->build/core/shared_library.mk->build/core/dynamic_library.mk- >build/core/binary.mk->build/core/base_rules.mk </p></p><p>                                                                                                                                                                                                   (  calculates the values of some basic variables and creates some basic dependency rules)</p><p><p>                                                                                                                                                           ->build/core/static_library.mk (compile. a static library File) </p></p><p><p>                                                                                                                                                          ->build/core/executable.mk (compile Executable) </p></p><p><p>                                                                                                                                                          ->build/core/prebuilt.mk (compile a pre-compiled third-party library File) </p></p><p><p>->build/core/makfile (with system.img, boot.img, recovery.img and other image file generation Rules)</p></p><p><p>The environment variable One_shot_makefile holds the file path to the android.mk of the module to be compiled, and if the environment variable value is empty, it means that the M or make command is executed, and all modules in the Android source code are Compiled.</p></p><p><p></p></p><p><p><strong>mm, mmm is similar, is used to compile some modules.</strong></p></p><p><p>With these compile commands, you first need to configure the environment in the Android root directory</p></p><pre><pre><code class="language-python hljs"><span class="hljs-comment">#source build/envsetup.sh   要确保当前根目录下有envsetup.sh脚本文件<br></span></code></pre></pre><pre><pre><code class="language-python hljs"><span class="hljs-comment">#lunch ... 对工程的选择</span></code></pre></pre><pre><pre><code class="language-python hljs"><span class="hljs-comment">#cd （要编译模块所在的目录）</span></code></pre></pre><pre><pre><code class="language-python hljs"><span class="hljs-comment">#mm(mma、mmm、mmma) -B -j2 2>&1   开始编译模块</span></code></pre></pre><pre><pre><code class="language-undefined">注：-B表示编译模块的所有文件，-j2表示编译的时候开启两个线程，2>&1表示将错误切换到输出（输入为0，输出为1，错误为2）。 </code></pre></pre><pre><pre><code class="language-css hljs">  <span class="hljs-selector-tag">envsetup<span class="hljs-selector-class">.sh脚本文件里包含<span class="hljs-selector-tag">vendorsetup<span class="hljs-selector-class">.sh 、<span class="hljs-selector-tag">lunch、 <span class="hljs-selector-tag">m <span class="hljs-selector-tag">mm <span class="hljs-selector-tag">mmm的定义</span></span></span></span></span></span></span></span></code></pre></pre><p><p></p></p><p><p><strong><span style="font-size: 16px">MMM and mm differences:</span></strong></p></p><p><p><strong><span style="font-size: 16px">Mmm Package/apps/deskclock</span></strong></p></p><p><p><strong><span style="font-size: 16px">CD package/apps/deskclock, and then mm</span></strong></p></p><p><p>Android compile: The difference between m, mm, mmm, mma, Mmma</p></p></span>