javascript - linux 安装 mcrypt PHP拓展遇到如下问题，怎么解决呢？

[root@localhost mcrypt-2.6.8]# make
make all-recursive
make[1]: Entering directory `/usr/local/src/mcrypt-2.6.8'
Making all in doc
make[2]: Entering directory `/usr/local/src/mcrypt-2.6.8/doc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/src/mcrypt-2.6.8/doc'
Making all in src
make[2]: Entering directory `/usr/local/src/mcrypt-2.6.8/src'
gaa -o gaaout.c -i gaa.h mcrypt.gaa
make[2]: gaa：命令未找到
make[2]: * [gaaout.c] 错误 127
make[2]: Leaving directory `/usr/local/src/mcrypt-2.6.8/src'
make[1]: * [all-recursive] 错误 1
make[1]: Leaving directory `/usr/local/src/mcrypt-2.6.8'
make: * [all] 错误 2

回复内容：

[root@localhost mcrypt-2.6.8]# make
make all-recursive
make[1]: Entering directory `/usr/local/src/mcrypt-2.6.8'
Making all in doc
make[2]: Entering directory `/usr/local/src/mcrypt-2.6.8/doc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/src/mcrypt-2.6.8/doc'
Making all in src
make[2]: Entering directory `/usr/local/src/mcrypt-2.6.8/src'
gaa -o gaaout.c -i gaa.h mcrypt.gaa
make[2]: gaa：命令未找到
make[2]: * [gaaout.c] 错误 127
make[2]: Leaving directory `/usr/local/src/mcrypt-2.6.8/src'
make[1]: * [all-recursive] 错误 1
make[1]: Leaving directory `/usr/local/src/mcrypt-2.6.8'
make: * [all] 错误 2