Error - Installating libosmo-abis

Hi, I am trying to configure and run OsmoTRX,OsmoBTS, OsmoNITB and LCR as per instructions at ; http://openbsc.osmocom.org/trac/wiki/network_from_scratch After installation of libosmocore when i run ./configure in libosmo-abis-master , I get the error below every time. Please note that I have installed libosmocore-0.6.0 but some how even while running pkg-config --modversion libosmocore command the version is reported as having value of UNKNOWN. I have also set the path of PKG_CONFIG_PATH correctly where the file libosmocore.pc is actually located but still this error is seen. checking if gcc supports -fvisibility=hidden... yes checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for LIBOSMOCORE... no configure: error: Package requirements (libosmocore >= 0.3.0) were not met: Requested 'libosmocore >= 0.3.0' but version of Osmocom Core Library is UNKNOWN Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables LIBOSMOCORE_CFLAGS and LIBOSMOCORE_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details. Please help me in this regard. Regards, Sarosh