以下为linux上安装apache时自己遇到的一些问题，记录在这，以后遇到时也会不定时更新...
一.安装Apache提示APR not found的解决办法
解决方法：
1. 网站 http://apr.apache.org/download.cgi 下载 apr-1.5.1.tar.gz 、apr-util-1.5.4.tar.gz
2. 网站 http://www.pcre.org/ 下载 pcre-8.36.tar.gz
3.依次解压、安装
附相关命令:
[root@test ~]# tar -zxvf xxx.tar.gz
[root@test ~]# ./configure --prefix=path //path为安装路径
[root@test ~]# make
[root@test ~]# make install
4. apache 设置指定库位置
[root@test ~]# ./configure --prefix=/usr/local/httpd-2.4.10 --with-apr=apr-path --with-apr-util=aprutil-path --with-pcre=pcre-path --enable-so //把path修改成各自的安装路径即可
5. make && make install
二、/xxx/httpd-2.4.x/support/ab.c:2273: undefined reference to `TLSv1_2_client_method'、/xxx/httpd-2.4.x/support/ab.c:2271: undefined reference to `TLSv1_1_client_method'
错误日志：
...
ab.o: In function `main':
/xxx/httpd-2.4.x/support/ab.c:2273: undefined reference to `TLSv1_2_client_method'
/xxx/httpd-2.4.x/support/ab.c:2271: undefined reference to `TLSv1_1_client_method'
collect2: ld returned 1 exit status
make[2]: *** [ab] Error 1
make[2]: Leaving directory `/xxx/httpd-2.4.x/support'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/xxx/httpd-2.4.x/support'
make: *** [all-recursive] Error 1
解决方法：
open-ssl 库有问题， 安装时需要加上
1 [root@test ~]# ./config -fPIC --prefix=path enable-shared
2 [root@test ~]# ./config -t
3 [root@test ~]# make depend
4 [root@test ~]# make
5 [root@test ~]# make test
6 [root@test ~]# make install
然后安装apache时指定
[root@test ~]# ./configure --prefix=/usr/local/httpd-2.4.10 --with-ssl=openssl-path --enable-so
三、relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
错误日志：
make[4]: Entering directory `/home/zfh/httpd-2.2.9/modules/filters'
/home/user/httpd-2.2.9/srclib/apr/libtool --silent --mode=link gcc -g -O2 -pthread -L/usr/local/zlib//lib -o mod_deflate.la -rpath /usr/local/apache2/modules -module -avoid-version mod_deflate.lo -lz
/usr/bin/ld: /usr/local/zlib//lib/libz.a(crc32.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/usr/local/zlib//lib/libz.a: could not read symbols: Bad value //注意这行
collect2: ld returned 1 exit status
make[4]: *** [mod_deflate.la] Error 1
make[4]: Leaving directory `/home/zfh/httpd-2.2.9/modules/filters'
make[3]: *** [shared-build-recursive] Error 1
make[3]: Leaving directory `/home/zfh/httpd-2.2.9/modules/filters'
make[2]: *** [shared-build-recursive] Error 1
make[2]: Leaving directory `/home/zfh/httpd-2.2.9/modules'
make[1]: *** [shared-build-recursive] Error 1
make[1]: Leaving directory `/home/zfh/httpd-2.2.9'
make: *** [all-recursive] Error 1
[root@localhost httpd-2.2.9]#
错误为zlib库有问题，错误中有提示 recompile with -fPIC 即加上 -fPIC进行编译。
解决方法：
1. 找到zlib的源码安装包，或者直接下载一个 。地址：http://www.zlib.net/
2. 执行以下相关命令
[root@test ~]# tar -zxvf zlib-1.2.3.tar.gz
[root@test ~]# cd zlib-1.2.3
[root@test ~]# ./configure --prefix=path //path为自定义安装路径
[root@test ~]# vi Makefile
[root@test ~]# 找到 CFLAGS=-O3 -DUSE_MMAP
[root@test ~]# 在后面加入-fPIC，即变成CFLAGS=-O3 -DUSE_MMAP -fPIC
[root@test ~]# make && make install
3. 安装apache，添加 --with-zlib-1.2.3=zlib-path 参数
1 [root@test ~]# ./configure --prefix=/usr/local/httpd-2.4.10 --with-zlib-1.2.3=zlib-path --enable-so //把path修改成各自的安装路径即可
未完待续...