安装msn-pecan出现错误

[adamdjw]

我自定义安装的pidgin 安装目录是/home/我的用户名/pidgin-2.5 但是编译msn-pecan时候出现错误,错误回显是
Package purple was not found in the pkg-config search path.
Perhaps you should add the directory containing `purple.pc'
to the PKG_CONFIG_PATH environment variable
No package 'purple' found
Package PKG_CONFIG_PATH=/home/adamdjw/pidgin-2.5/lib/pkgconfig was not found in the pkg-config search path.
Perhaps you should add the directory containing `PKG_CONFIG_PATH=/home/adamdjw/pidgin-2.5/lib/pkgconfig.pc'
to the PKG_CONFIG_PATH environment variable
No package 'PKG_CONFIG_PATH=/home/adamdjw/pidgin-2.5/lib/pkgconfig' found
Package purple was not found in the pkg-config search path.
Perhaps you should add the directory containing `purple.pc'
to the PKG_CONFIG_PATH environment variable
No package 'purple' found
[CC] msn.o
msn.c:51:19: warning: debug.h: 没有该文件或目录
msn.c:52:21: warning: privacy.h: 没有该文件或目录
msn.c:53:21: warning: request.h: 没有该文件或目录
msn.c:54:24: warning: accountopt.h: 没有该文件或目录
msn.c:55:24: warning: pluginpref.h: 没有该文件或目录
msn.c:56:18: warning: cmds.h: 没有该文件或目录
msn.c:57:21: warning: version.h: 没有该文件或目录
msn.c:58:18: warning: core.h: 没有该文件或目录
msn.c:59:18: warning: prpl.h: 没有该文件或目录
msn.c:60:18: warning: util.h: 没有该文件或目录
msn.c:61:19: warning: prefs.h: 没有该文件或目录
msn.c:64:25: error: missing binary operator befor

应该怎么如何设置pkd_config_path....着急ing