linux安装redis时报collect2: fatal error: cannot find 'ld'和In file included from adlist.c:34:0:

　　如题，看了下该ld命令所在文件：

[root@centos redis-4.0.14]# whereis ld
ld: /usr/bin/ld.gold /usr/bin/ld /usr/bin/ld.bfd /usr/share/man/man1/ld.1.gz

　　发现ld是一个软连接，而且该软连接一直在闪烁：

[root@centos redis-4.0.14]# ll /usr/bin/ld*
lrwxrwxrwx. 1 root root      20 Mar 23  2017 /usr/bin/ld -> /etc/alternatives/ld
-rwxr-xr-x. 1 root root  873928 Aug  8  2016 /usr/bin/ld.bfd
-rwxr-xr-x. 1 root root    5302 Aug 11  2016 /usr/bin/ldd
-rwxr-xr-x. 1 root root 4859448 Aug  8  2016 /usr/bin/ld.gold

　　到该软连接目录下，发现软连接失效，已不存在ld：

[root@centos redis-4.0.14]# cd /etc/alternatives/
[root@centos alternatives]# ll
total 0

　　解决：换个好的环境，发现原来该软连接是指向/usr/bin/ld.bfd

[root@centosalternatives]# ll
total 0
lrwxrwxrwx 1 root root 15 May 22 21:38 ld -> /usr/bin/ld.bfd

　　回到失败环境/etc/alternatives目录，创建软连接：

[root@centos alternatives]# touch ld
[root@centos alternatives]# ln -s /usr/bin/ld.bfd ld
[root@centos alternatives]# ll /usr/bin/ld*
lrwxrwxrwx. 1 root root      20 Mar 23  2017 /usr/bin/ld -> /etc/alternatives/ld
-rwxr-xr-x. 1 root root  873928 Aug  8  2016 /usr/bin/ld.bfd
-rwxr-xr-x. 1 root root    5302 Aug 11  2016 /usr/bin/ldd
-rwxr-xr-x. 1 root root 4859448 Aug  8  2016 /usr/bin/ld.gold

　　现在软连接不闪了，再次编译redis，出来另一个提示：

[root@centos redis-4.0.14]# make
cd src && make all
make[1]: Entering directory `/root/redis/redis-4.0.14/src'
    CC Makefile.dep
make[1]: Leaving directory `/root/redis/redis-4.0.14/src'
make[1]: Entering directory `/root/redis/redis-4.0.14/src'
    CC adlist.o
In file included from adlist.c:34:0:
zmalloc.h:50:31: fatal error: jemalloc/jemalloc.h: No such file or directory
 #include <jemalloc/jemalloc.h>
                               ^
compilation terminated.
make[1]: *** [adlist.o] Error 1
make[1]: Leaving directory `/root/redis/redis-4.0.14/src'
make: *** [all] Error 2

　　编译命令使用如下语句，改变redis的分配器即可：

[root@centos redis-4.0.14]# make MALLOC=libc