基本上所有需要用到的包和庫都在官網：
https://www.gnupg.org/index.html
1.到http://pecl.php.net/package/gnupg下載gnupg包。
2.make gnupg包的時候，會提示你缺少gpgme，到https://www.gnupg.org/ftp/gcrypt/gpgme/gpgme-1.6.0.tar.bz2這裏下載。
3.安裝gpgme的時候，會提示我們：
configure:
***
*** You need libgpg-error to build this program.
** This library is for example available at
*** ftp://ftp.gnupg.org/gcrypt/libgpg-error
*** (at least version 1.11 is required.)
***
configure:
***
*** You need libassuan to build this program.
*** This library is for example available at
*** ftp://ftp.gnupg.org/gcrypt/libassuan/
*** (at least version 2.0.2 (API 2) is required).
***
configure: error:
***
*** Required libraries not found. Please consult the above messages
*** and install them before running configure again.
***
[root@supportserver-51 gpgme-1.6.0]# 所以我們還需要安裝libgpg-error和libassuan擴展，這兩個擴展在www.gnupg.org官網都有的。