word2vec centos 安装

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google的下载地址国内已无法连接，下载地址http://download.csdn.net/detail/u013378306/9741439
安装步骤

1、下载word2vec，其目录结构如下：

2、进入word2vec所在目录，使用make指令进行安装

make

可以发现在安装的时候，会出现如下error:

gcc word2vec.c -o word2vec -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result   cc1: error: invalid option argument ?Ofast?   cc1: warning: unrecognized command line option “-Wno-unused-result”   make: *** [word2vec] Error 1

这是因为该系统的gcc不支持Ofast选项的原因。

3、编辑makefile文件，更改gcc安装选项

vi ./makefile

word2vec的makefile源码如下:

    CC = gcc       #The -Ofast might not work with older versions of gcc; in that case, use -O2       CFLAGS = -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result               all: word2vec word2phrase distance word-analogy compute-accuracy               word2vec : word2vec.c        $(CC) word2vec.c -o word2vec $(CFLAGS)       word2phrase : word2phrase.c        $(CC) word2phrase.c -o word2phrase $(CFLAGS)       distance : distance.c        $(CC) distance.c -o distance $(CFLAGS)       word-analogy : word-analogy.c        $(CC) word-analogy.c -o word-analogy $(CFLAGS)       compute-accuracy : compute-accuracy.c        $(CC) compute-accuracy.c -o compute-accuracy $(CFLAGS)        chmod +x *.sh               clean:        rm -rf word2vec word2phrase distance word-analogy compute-accuracy

注意观察，第二行：

#The -Ofast might not work with older versions of gcc; in that case, use -O2

google的工程师这里有写到相关注意事项，告诉开发者，-Ofast安装选项，可能对于旧版本的gcc不支持，如果在这种情况下，需要将-Ofast改为-O2，所以将第三行CFLAGS = -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result更改为CFLAGS = -lm -pthread -O2-march=native -Wall -funroll-loops -Wno-unused-result。

4、使用make指令安装通过

make

安装通过后的内容为：

    gcc word2vec.c -o word2vec -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result      gcc word2phrase.c -o word2phrase -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result      gcc distance.c -o distance -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result      gcc word-analogy.c -o word-analogy -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result      gcc compute-accuracy.c -o compute-accuracy -lm -pthread -Ofast -march=native -Wall -funroll-loops -Wno-unused-result      chmod +x *.sh

按照上述操作即可成功安装Word2vec。

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