编译hadoop的libhdfs.a

进入hadoop-hdfs-project/hadoop-hdfs/src目录，执行cmake以生成Makefile文件。


如果遇到如下的错误：
~/hadoop-2.7.1-src/hadoop-hdfs-project/hadoop-hdfs/src]$ cmake .
JAVA_HOME=, JAVA_JVM_LIBRARY=/data/jdk/jre/lib/amd64/server/libjvm.so
JAVA_INCLUDE_PATH=/data/jdk/include, JAVA_INCLUDE_PATH2=/data/jdk/include/linux
Located all JNI components successfully.
CMake Error at CMakeLists.txt:84 (MESSAGE):
  You must set the CMake variable GENERATED_JAVAH
-- Configuring incomplete, errors occurred!


则指定一下cmake参数即可，如下所示：
cmake -DJAVA_HOME=/data/jdk -DGENERATED_JAVAH=/data/jdk .


然后带参数再次执行cmake：
~/hadoop-2.7.1-src/hadoop-hdfs-project/hadoop-hdfs/src]$ cmake -DJAVA_HOME=/data/jdk -DGENERATED_JAVAH=/data/jdk .


下面的显示表示cmake成功，会在当前目录下生成Makefile文件：
JAVA_HOME=/data/jdk, JAVA_JVM_LIBRARY=/data/jdk/jre/lib/amd64/server/libjvm.so
JAVA_INCLUDE_PATH=/data/jdk/include, JAVA_INCLUDE_PATH2=/data/jdk/include/linux
Located all JNI components successfully.
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.23") 
-- checking for module 'fuse'
--   package 'fuse' not found
-- Failed to find Linux FUSE libraries or include files.  Will not build FUSE client.
-- Configuring done
-- Generating done
-- Build files have been written to: /data/hadoop-2.7.1-src/hadoop-hdfs-project/hadoop-hdfs/src


接下来就可以执行make来编译生成libhdfs.a了。