Linux上編譯hadoop-2.7.1的libhdfs.so和libhdfs.a

hadoop提供了CMake來編譯libhdfs，是以在編譯之前需要先安裝好CMake工具。

然後進入libhdfs的源代碼目錄，如：/data/hadoop-2.7.1-src/hadoop-hdfs-project/hadoop-hdfs/src

執行cmake以生成Makefile檔案（假設jdk的安裝目錄為/data/jdk1.7.0_55）：

cmake -DGENERATED_JAVAH=/data/jdk1.7.0_55 -DJAVA_HOME=/data/jdk1.7.0_55 .

成功之後，會在目錄下生成Makefile檔案，接下來就可以執行make編譯生成libhdfs.so和libhdfs.a了。

如果遇到下面這樣的錯誤：

/data/jdk1.7.0_55/jre/lib/amd64/server/libjvm.so: file not recognized: File format not recognized

注意在更新gcc和ld之後，需要更新下環境變量PATH，再重執行cmake，否則可能引用的仍然是老版本的gcc和ld。

/data/hadoop-2.7.1-src/hadoop-hdfs-project/hadoop-hdfs/src # cmake -DGENERATED_JAVAH=/data/java_1_7 -DJAVA_HOME=/data/java_1_7

-- The C compiler identification is GNU 4.1.2

-- The CXX compiler identification is GNU 4.1.2

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

JAVA_HOME=/data/java_1_7, JAVA_JVM_LIBRARY=/data/java_1_7/jre/lib/amd64/server/libjvm.so

JAVA_INCLUDE_PATH=/data/java_1_7/include, JAVA_INCLUDE_PATH2=/data/java_1_7/include/linux

Located all JNI components successfully.

-- Performing Test HAVE_BETTER_TLS

-- Performing Test HAVE_BETTER_TLS - Success

-- Performing Test HAVE_INTEL_SSE_INTRINSICS

-- Performing Test HAVE_INTEL_SSE_INTRINSICS - Success

-- Looking for dlopen in dl

-- Looking for dlopen in dl - found

-- Found JNI: /data/java_1_7/jre/lib/amd64/libjawt.so  

-- Found PkgConfig: /usr/bin/pkg-config (found version "0.20") 

-- 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