【Linux apt-get 更换源】
1.问题描述：按照网上的教程编辑源列表文件后发现apt-get update 出现各种错误，导致更新失败
sudo vim /etc/apt/sources.list
2.分析：文件中的源地址语句 -> deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse ，红字部分要对应当前的系统版本。
3.解决方法：通过网页https://packages.ubuntu.com/查询版本，然后替换掉
【apr-util安装时的错误】
1.问题描述：./Configure时候报错 -> "xml/apr_xml.c:35:19: fatal error: expat.h: No such file or directory"
2.分析：缺少libexpat1-dev包
3.解决方案：apt-get install libexpat1-dev
备注：apr系列的安装参考博客 -> https://www.cnblogs.com/yuzhaokai0523/p/4382974.html
【./Configure Apache时报错1】
1.问题描述：
configure: WARNING: OpenSSL version is too old
no
checking whether to enable mod_ssl... configure: error: mod_ssl has been requested but can not be built due to prerequisite failures
2.分析：已经有了OpenSSL依赖包，但是没有OpenSSL-devel依赖包（Ubuntu下 -> libssl-dev）
3.解决方法：
sudo apt-get install libssl-dev
备注：Configure语句：./configure --prefix=/usr/local/httpd --enable-so --enable-ssl --enable-rewrite --with-pcre=/usr/local/pcre --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --enable-modules=most --enable-mpms-shared=all --with-mpm=event --with-included-apr
【./Configure Apache时报错2】
1.问题描述：
collect2: error: ld returned 1 exit status
Makefile:48: recipe for target 'htpasswd' failed
make[2]: *** [htpasswd] Error 1
make[2]: Leaving directory '/home/liyang/Downloads/httpd-2.4.37/support'
/home/liyang/Downloads/httpd-2.4.37/build/rules.mk:75: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/liyang/Downloads/httpd-2.4.37/support'
/home/liyang/Downloads/httpd-2.4.37/build/rules.mk:75: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1
2.分析：已经编译过apr和apr-util，还是会出错。
3.解决方法：
把解压好的apr和apr-util 复制到 /apache_path/srclib/ 中去，再重新Configure //红字部分是Down下来解压后的Apache目录
备注：Configure语句：./configure --prefix=/usr/local/httpd --enable-so --enable-ssl --enable-rewrite --with-pcre=/usr/local/pcre --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --enable-modules=most --enable-mpms-shared=all --with-mpm=event --with-included-apr
【编译PHP后没有libphp7.so文件】
1.描述：/ust/local/htpd/modules/ 下没有libphp*.so 文件
2.分析：属于编译PHP时参数缺少的问题
3.解决方法：PHP解压目录下，加入红字部分
./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/lib --with-zlib-dir=/usr/lib --with-apxs2=/usr/local/httpd/bin/apxs
【成功案例】（亲测）
https://blog.csdn.net/sunjinyan_1/article/details/80502117
【编译php7.0.17报错提示 undefined reference to `libiconv_open'】
1.描述:
/opt/src/php-7.0.17/ext/iconv/iconv.c:755: undefined reference to `libiconv_open' /opt/src/php-7.0.17/ext/iconv/iconv.c:779: undefined reference to `libiconv' /opt/src/php-7.0.17/ext/iconv/iconv.c:813: undefined reference to `libiconv_close' ext/iconv/.libs/iconv.o: In function `_php_iconv_appendl': /opt/src/php-7.0.17/ext/iconv/iconv.c:474: undefined reference to `libiconv' /opt/src/php-7.0.17/ext/iconv/iconv.c:508: undefined reference to `libiconv' ext/iconv/.libs/iconv.o: In function `_php_iconv_mime_decode': /opt/src/php-7.0.17/ext/iconv/iconv.c:1505: undefined reference to `libiconv_open' /opt/src/php-7.0.17/ext/iconv/iconv.c:1998: undefined reference to `libiconv_close' /opt/src/php-7.0.17/ext/iconv/iconv.c:2001: undefined reference to `libiconv_close' /opt/src/php-7.0.17/ext/iconv/iconv.c:1616: undefined reference to `libiconv_close' /opt/src/php-7.0.17/ext/iconv/iconv.c:1619: undefined reference to `libiconv_open' ext/iconv/.libs/iconv.o: In function `_php_iconv_substr': --------------------- 作者：大事龙 来源：CSDN 原文：https://blog.csdn.net/w_yunlong/article/details/69944433 版权声明：本文为博主原创文章，转载请附上博文链接！
2.解决方法：make 时增加 ZEND_EXTRA_LIBS=’-liconv’