LAMP--apache 的扩展模块安装
在配置域名 301 跳转时，发现 mod_rewrite.c 模块没有加载，所以以此为例。 这个用到了 apache 的扩展工具 apxs在使用这个功能之前，先确认是否已经加载 mod_so 模块，方法是：
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# /usr/local/apache2/bin/httpd -l
在列出的列表里有 mod_so 模块，则说明已经加载。
然后在源码包下找模块的C文件。
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# cd /usr/local/src/httpd-2.2.31
# find . -name mod_rewrite.c
./modules/mappers/mod_rewrite.c
# cd ./modules/mappers/
# pwd
/usr/local/src/httpd-2.2.31/modules/mappers
# /usr/local/apache2/bin/apxs -i -a -c mod_rewrite.c
/usr/local/apache2/build/libtool --silent --mode=compile gcc -prefer-pic -DLINUX -D_REENTRANT -D_GNU_SOURCE -g -O2 -pthread -I/usr/local/apache2/include-I/usr/local/apache2/include -I/usr/local/apache2/include -c -o mod_rewrite.lo mod_rewrite.c && touch mod_rewrite.slo
/usr/local/apache2/build/libtool --silent --mode=link gcc -o mod_rewrite.la-rpath /usr/local/apache2/modules -module -avoid-version mod_rewrite.lo
/usr/local/apache2/build/instdso.sh SH_LIBTOOL='/usr/local/apache2/build/libtool' mod_rewrite.la /usr/local/apache2/modules
/usr/local/apache2/build/libtool --mode=install cp mod_rewrite.la /usr/local/apache2/modules/
cp .libs/mod_rewrite.so /usr/local/apache2/modules/mod_rewrite.so
cp .libs/mod_rewrite.lai /usr/local/apache2/modules/mod_rewrite.la
cp .libs/mod_rewrite.a /usr/local/apache2/modules/mod_rewrite.a
chmod 644 /usr/local/apache2/modules/mod_rewrite.a
ranlib /usr/local/apache2/modules/mod_rewrite.a
PATH="$PATH:/sbin" ldconfig -n /usr/local/apache2/modules
----------------------------------------------------------------------
Libraries have been installed in:
/usr/local/apache2/modules
If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the `LD_RUN_PATH' environment variable
during linking
- use the `-Wl,--rpath -Wl,LIBDIR' linker flag
- have your system administrator add LIBDIR to `/etc/ld.so.conf'
See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
chmod 755 /usr/local/apache2/modules/mod_rewrite.so
根据：
Libraries have been installed in:
/usr/local/apache2/modules
知道模块安装到了哪里。
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