xen源码安装时出现acipa错误解决方法

今天在centos5.4下面源码安装xen4.1时出错了，错误如下：

ACPI ASL compiler (iasl) is needed
Download and install Intel ACPI CA from

make[8]: *** [iasl] Error 1
make[8]: Leaving directory `/root/xen-4.0.0/tools/firmware/hvmloader/acpi’
make[7]: *** [subdir-all-acpi] Error 2
make[7]: Leaving directory `/root/xen-4.0.0/tools/firmware/hvmloader’
make[6]: *** [subdirs-all] Error 2
make[6]: Leaving directory `/root/xen-4.0.0/tools/firmware/hvmloader’
make[5]: *** [subdir-all-hvmloader] Error 2
make[5]: Leaving directory `/root/xen-4.0.0/tools/firmware’
make[4]: *** [subdirs-all] Error 2
make[4]: Leaving directory `/root/xen-4.0.0/tools/firmware’
make[3]: *** [all] Error 2
make[3]: Leaving directory `/root/xen-4.0.0/tools/firmware’
make[2]: *** [subdir-install-firmware] Error 2
make[2]: Leaving directory `/root/xen-4.0.0/tools’
make[1]: *** [subdirs-install] Error 2
make[1]: Leaving directory `/root/xen-4.0.0/tools’
make: *** [install-tools] Error 2

尝试从下载源码进行安装，再执行

make依然没有解决问题，在网上找了些资料，发现自己少装了一个包：iasl

用centos5.4自带的yum源安装：

yum install iasl

解决问题