Fucking "pkg-config not found"

If you got 

pkg-config not found

error in gnu auto tools

 

then, you must install the related librarys such as : libcurl-nss libcurl-gnu libcurl-xxx

then, 

 

autogen.sh  agin

 

maybe you have to configure the env of "export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/bin" firstly.