linux 安装 mcrypt PHP拓展遇到如下问题，怎么解决呢？

Question

[root@localhost mcrypt-2.6.8]# makemake all-recursivemake[1]: Entering directory `/usr/local/src/mcrypt-2.6.8'Making all in docmake[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 srcmake[2]: Entering directory `/usr/local/src/mcrypt-2.6.8/src'gaa -o gaaout.c -i gaa.h mcrypt.gaamake[2]: gaa：命令未找到make[2]: * [gaaout.c] 错误 127make[2]: Leaving directory `/usr/local/src/mcrypt-2.6.8/src'make[1]: * [all-recursive] 错误 1make[1]: Leaving directory `/usr/local/src/mcrypt-2.6.8'make: * [all] 错误 2