最近在学习nginx，nginx rewrite依赖于PCRE库，所以需要在linux系统中编译安装PCRE库。具体步骤如下：
1.下载PCRE包
首先去官网下载pcre的安装包
如果通过FTP的方式，下载地址为：ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
如果通过http的方式，下载地址为：http://sourceforge.net/projects/pcre/files/pcre/
目前最新的版本为8.32，linux对应的安装包名称为：pcre-8.32.tar.gz。
2.把安装包上传到服务器，然后解压
[root@localhost local]# tar -zxvf pcre-8.32.tar.gz
解压之后在当前目录下生成了一个文件夹：pcre-8.32
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drwxr-xr-x 7 1169 1169 4096 Nov 30 18:50 pcre-8.32
3.配置
[root@localhost pcre-8.32]# ./configure
配置完之后控制台会打印出pcre配置的摘要信息
pcre-8.32 configuration summary:
Install prefix .................. : /usr/local
C preprocessor .................. : gcc -E
C compiler ...................... : gcc
C++ preprocessor ................ : g++ -E
C++ compiler .................... : g++
Linker .......................... : /usr/bin/ld
C preprocessor flags ............ :
C compiler flags ................ : -O2 -fvisibility=hidden
C++ compiler flags .............. : -O2 -fvisibility=hidden -fvisibility-inlines-hidden
Linker flags .................... :
Extra libraries ................. :
Build 8 bit pcre library ........ : yes
Build 16 bit pcre library ....... : no
Build 32 bit pcre library ....... : no
Build C++ library ............... : yes
Enable JIT compiling support .... : no
Enable UTF-8/16/32 support ...... : no
Unicode properties .............. : no
Newline char/sequence ........... : lf
\R matches only ANYCRLF ......... : no
EBCDIC coding ................... : no
EBCDIC code for NL .............. : n/a
Rebuild char tables ............. : no
Use stack recursion ............. : yes
POSIX mem threshold ............. : 10
Internal link size .............. : 2
Match limit ..................... : 10000000
Match limit recursion ........... : MATCH_LIMIT
Build shared libs ............... : yes
Build static libs ............... : yes
Use JIT in pcregrep ............. : no
Buffer size for pcregrep ........ : 20480
Link pcregrep with libz ......... : no
Link pcregrep with libbz2 ....... : no
Link pcretest with libedit ...... : no
Link pcretest with libreadline .. : no
Valgrind support ................ : no
Code coverage ................... : no
4.编译
执行make操作：
[root@localhost pcre-8.32]# make
编译完后可以执行make check进行测试（这一步非必须）
Testing pcregrep version 8.32 2012-11-30 Testing pcregrep main features Skipping pcregrep UTF-8 tests: no UTF-8 support in PCRE library Testing pcregrep newline settings PASS: RunGrepTest ================== All 5 tests passed ================== make[2]: Leaving directory `/usr/local/pcre-8.32' make[1]: Leaving directory `/usr/local/pcre-8.32' [root@localhost pcre-8.32]#
上面的make check结果中有一句:
Skipping pcregrep UTF-8 tests: no UTF-8 support in PCRE library
这是因为在前面步骤中执行./configuration配置时没有加上对utf-8的支持
如果要加上对utf-8的支持可以在./configuration时加上参数：
[root@localhost pcre-8.32]# ./configure --enable-utf8
配置完后再重新make
make完后再次执行make check结果如下：
Testing pcregrep version 8.32 2012-11-30 Testing pcregrep main features Testing pcregrep UTF-8 features Testing pcregrep newline settings PASS: RunGrepTest ================== All 5 tests passed ================== make[2]: Leaving directory `/usr/local/pcre-8.32' make[1]: Leaving directory `/usr/local/pcre-8.32' [root@localhost pcre-8.32]#
5.安装
执行make install操作：
[root@localhost pcre-8.32]# make install
make install结束后pcre编译安装流程就结束了。