Compile Libjingle in Ubuntu

Compile Libjingle $ gclient config http://libjingle.googlecode.com/svn/trunk under Ubuntu to generate. gclient file www.2cto.com $ gclient sync get source code $ gclient runhooks generate Makefile file execute runhooks this step will encounter the following errors: www.2cto.com Updating projects from gyp files... package nss was not found in the pkg-config search path. perhaps you shoshould add the directory containing 'nss. pc 'to the PKG_CONFIG_PATH environment variableNo package 'ns' found to install this package: apt-get install libnss3-dev Updating projects from gyp files... package gtk +-2.0 was not found in the pkg-config search path. perhaps you shoshould add the directory containing 'gtk +-2.0.pc' to the PKG_CONFIG_PATH environment variableNo package 'gtk +-2.0 'found to install this package: apt-get install libgtk2.0-dev down the cd trunk directory, there is already a Makefile file, directly Make