Adjusting PKG_CONFIG_PATH environment variable Problem

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http://forums.fedoraforum.org – Hi all, I have fedora 17 installed on my system. I have also latest version of Gnuradio. While installing a toolbox i followed the steps given at https://www.cgran.org/wiki/chancoding But when i give ./configure it shows following error at the end. checking for GNURADIO_CORE... configure: error: Package requirements (gnuradio-core >= 3) were not met: No package 'gnuradio-core' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables GNURADIO_CORE_CFLAGS and GN (HowTos)