clang: error: linker command failed with exit code 1 (use -v to see invocation)

[sammmore]

Hi, I am fairly new in sequence programming and while compiling sequencetree on macOS, I am getting this error while running make:

d gui/ && /Library/Developer/CommandLineTools/usr/bin/make -f Makefile
make[1]: Nothing to be done for `first'.
cd VS/ && /Library/Developer/CommandLineTools/usr/bin/make -f Makefile
clang++ -headerpad_max_install_names -stdlib=libc++ -mmacosx-version-min=10.9 -arch x86_64 -o ../../bin/VS build/vsmain.o build/vsmainwindow.o build/vssequenceview.o build/vsphantomview.o build/vspropertyeditor.o build/run_virtual_scan.o build/vsabstractscanner.o build/vsobjectstate.o build/vsobjecttransformation.o build/vsphantom.o build/vsktermlist.o build/vsktermscanner.o build/stsimscannerblocklist.o build/stmetasequencesimulator.o build/stmetasequence.o build/stmetanode.o build/stmetaclass.o build/slist.o build/sstring.o build/stresources.o build/mda.o build/complex.o build/distribute_raw_data.o build/stringchooserdlg.o build/stconfigurationdlg.o build/stglobalview.o build/stcompilelog.o build/basicphantoms.o build/kspacefunction.o build/basickspacefunctions.o build/vsbasicphantoms.o build/vsphantomplugin.o build/moc_vsmainwindow.o build/moc_vssequenceview.o build/moc_vsphantomview.o build/moc_vspropertyeditor.o build/moc_vsabstractscanner.o build/moc_vsphantom.o build/moc_vsktermlist.o build/moc_stmetasequencesimulator.o build/moc_stringchooserdlg.o build/moc_stglobalview.o build/moc_stcompilelog.o build/moc_basicphantoms.o build/moc_basickspacefunctions.o build/moc_vsbasicphantoms.o build/qrc_st4.o -F/usr/local/lib -L/usr/local/lib -L../../bin -lgsl -lgslcblas -framework QtGui -L/usr/local/opt/openssl@1.0/lib -L/usr/local/Cellar/qt@4/4.8.7_6/lib -F/usr/local/Cellar/qt@4/4.8.7_6/lib -framework QtCore
ld: library not found for -lgsl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [../../bin/VS] Error 1
make: *** [sub-VS-make_default] Error 2

Any way to rectify this issue? Thank you in advance