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
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