装了10.0怎么装东西老是出错

xiawuming

checking for GLIB - version >= 2.0.0... yes (version 2.2.3)
checking for gtk+-2.0 >= 2.2.2... Package gtk+-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found

configure: error: Library requirements (gtk+-2.0 >= 2.2.2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.
gtk+ 2.0 已经装好，该怎么办？

xiawuming

How to add a directory to the PKG_CONFIG_PATH environment variable?

Thank you very much!