把'gtk+-2.0'加到PKG_CONFIG_PATH中?

slowly13008

在使用pkg-config --list-all命令时提示gtk没有在环境变量里,如下:
$ pkg-config --list-all
gnome-mime-data-2.0  gnome-mime-data - Base set of file types and applications for GNOME
fontconfig           Fontconfig - Font configuration and customization library
gmodule-2.0          GModule - Dynamic module loader for GLib
gnome-python-2.0     GNOME-python - Python bindings for GNOME libraries
openssl              OpenSSL - Secure Sockets Layer and cryptography libraries and tools
libxml-2.0           libXML - libXML library version2.
libpng10             libpng10 - Loads and saves PNG files
glib-2.0             GLib - C Utility Library
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
Package 'gtk+-2.0', required by 'libpanel-applet-2', not found
我怎么才能把它加进去?

mozilla

/usr/local/lib/pkgconfig里看看