編譯安裝Apache遇到的缺乏expat.h與undefined reference to `XML

1 缺乏expat.h

編譯安裝Apache須要apr-util，而在編譯安裝apr-util時提示說缺乏expat.h，此時直接安裝expat庫便可（centos）：

yum install expat-devel

2 undefined reference to `XML_GetErrorCode'

首先安裝libxml2-devel包：

yum install libxml2-devel

接着刪除apr-util安裝目錄並從新編譯安裝：

sudo rm -rf /usr/local/apr-util
cd apr-util
make clean
./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
make
make install

目錄的話根據須要修改，最後從新編譯安裝apache：

cd httpd-xxxxx
make clean
./configure \
--prefix=/usr/local/apache \
--with-apr=/usr/local/apr \
--with-apr-util=/usr/local/apr-util \
--with-pcre=/usr/local/pcre

一樣目錄按需修改。