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
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
