cd /home/stephen/src/sdc/gitclone/shadowcoin/src/leveldb && CC=gcc CXX=g++ make OPT="-m64 -pipe -fstack-protector-all --param ssp-buffer-size=1 -O2" libleveldb.a libmemenv.a
make[1]: Entering directory `/home/stephen/src/sdc/gitclone/shadowcoin/src/leveldb'
make[1]: `libleveldb.a' is up to date.
make[1]: `libmemenv.a' is up to date.
make[1]: Leaving directory `/home/stephen/src/sdc/gitclone/shadowcoin/src/leveldb'
cd /home/stephen/src/sdc/gitclone/shadowcoin; /bin/sh share/genbuild.sh /home/stephen/src/sdc/gitclone/shadowcoin/build/build.h
g++ -m64 -fstack-protector-all --param ssp-buffer-size=1 -Wl,-O1 -Wl,-rpath-link,/usr/lib/x86_64-linux-gnu -o shadow build/txdb-leveldb.o build/transactiontablemodel.o build/addresstablemodel.o build/coincontroldialog.o build/coincontroltreewidget.o build/signverifymessagedialog.o build/aboutdialog.o build/editaddressdialog.o build/bitcoinaddressvalidator.o build/alert.o build/version.o build/sync.o build/smessage.o build/util.o build/netbase.o build/key.o build/script.o build/main.o build/miner.o build/init.o build/net.o build/irc.o build/checkpoints.o build/addrman.o build/db.o build/walletdb.o build/clientmodel.o build/guiutil.o build/transactionrecord.o build/optionsmodel.o build/monitoreddatamapper.o build/transactiondesc.o build/bitcoinstrings.o build/bitcoinamountfield.o build/wallet.o build/keystore.o build/walletmodel.o build/bitcoinrpc.o build/rpcdump.o build/rpcnet.o build/rpcmining.o build/rpcwallet.o build/rpcblockchain.o build/rpcrawtransaction.o build/rpcsmessage.o build/csvmodelwriter.o build/crypter.o build/qvalidatedlineedit.o build/bitcoinunits.o build/qvaluecombobox.o build/askpassphrasedialog.o build/protocol.o build/notificator.o build/qtipcserver.o build/rpcconsole.o build/trafficgraphwidget.o build/messagemodel.o build/noui.o build/kernel.o build/scrypt-arm.o build/scrypt-x86.o build/scrypt-x86_64.o build/scrypt.o build/pbkdf2.o build/stealth.o build/ringsig.o build/core.o build/shadowgui.o build/shadow.o build/shadowbridge.o build/addressbookpage.o build/state.o build/bloom.o build/qrc_shadow.o build/moc_transactiontablemodel.o build/moc_addresstablemodel.o build/moc_coincontroldialog.o build/moc_coincontroltreewidget.o build/moc_signverifymessagedialog.o build/moc_aboutdialog.o build/moc_editaddressdialog.o build/moc_bitcoinaddressvalidator.o build/moc_clientmodel.o build/moc_guiutil.o build/moc_optionsmodel.o build/moc_monitoreddatamapper.o build/moc_transactiondesc.o build/moc_bitcoinamountfield.o build/moc_walletmodel.o build/moc_csvmodelwriter.o build/moc_qvalidatedlineedit.o build/moc_qvaluecombobox.o build/moc_askpassphrasedialog.o build/moc_notificator.o build/moc_rpcconsole.o build/moc_trafficgraphwidget.o build/moc_messagemodel.o build/moc_shadowgui.o build/moc_shadowbridge.o build/moc_addressbookpage.o   -L/usr/X11R6/lib64 -lminiupnpc /home/stephen/src/sdc/gitclone/shadowcoin/src/leveldb/libleveldb.a /home/stephen/src/sdc/gitclone/shadowcoin/src/leveldb/libmemenv.a -lssl -lcrypto -ldb_cxx -lboost_system -lboost_filesystem -lboost_program_options -lboost_thread -lrt -ldl -lQt5WebKitWidgets -L/usr/lib/x86_64-linux-gnu -lQt5Quick -lQt5OpenGL -lQt5PrintSupport -lQt5WebKit -lQt5Qml -lQt5Location -lQt5Widgets -lQt5DBus -lQt5Network -lQt5Positioning -lQt5Sensors -lQt5Gui -lQt5Core -lpthread -lGL
/usr/bin/ld: cannot find -lGL
collect2: error: ld returned 1 exit status
make: *** [shadow] Error 1