Ubuntu installation error and solution

[owensgl]

I was trying to install v5.1 on a ubuntu system and I kept getting this error:

cc -L./nicksrc qpAdm.o nicksrc/libnick.a qpsubs.o mcio.o ldsubs.o admutils.o egsubs.o regsubs.o f4rank.o eigsubs.o eigx.o -lgsl -lopenblas -lm -lnick -o qpAdm
eigx.o: In function eigx_': /home/owens/bin/AdmixTools-5.1/src/eigx.c:94: undefined reference to dspev_'
eigx.o: In function eigxv_': /home/owens/bin/AdmixTools-5.1/src/eigx.c:118: undefined reference to dspev_'
eigx.o: In function cdc_': /home/owens/bin/AdmixTools-5.1/src/eigx.c:136: undefined reference to dpotrf_'
eigx.o: In function inverse_': /home/owens/bin/AdmixTools-5.1/src/eigx.c:173: undefined reference to dgetrf_'
/home/owens/bin/AdmixTools-5.1/src/eigx.c:180: undefined reference to dgetri_' eigx.o: In function solve_':
/home/owens/bin/AdmixTools-5.1/src/eigx.c:206: undefined reference to dgetrf_' /home/owens/bin/AdmixTools-5.1/src/eigx.c:212: undefined reference to dgetrs_'
eigx.o: In function geneigsolve_': /home/owens/bin/AdmixTools-5.1/src/eigx.c:230: undefined reference to dsygv_'
collect2: error: ld returned 1 exit status

This happened despite installing and updating GSL, openblas, gfortran, and lapack.
Based on this post about a related program (DReichLab/EIG#8) I tried
make all LDLIBS="-llapack"
This seemed to fix the error, and it installed fine.

Including a note about this might be useful in the install readme, and I'm posting this issue to help anyone else with the same issue.

[MatthewMah]

Thanks for your note. We actually were not sure what platform(s) needed the additional flag. I will add a note to the readme.

[MatthewMah]

README note finally added in 24e63b5.