]> Thank you to Mauricio Fernandez, St\'{e}phane Glondu, and Makus Mottl for helping me with this problem. Review of problem: When doing static compilation using LAPACK, encountering the following error: /usr/lib/libblas.a(xerbla.o): In function `xerbla_': (.text+0x0): multiple definition of `xerbla_' /usr/lib/liblapack.a(xerbla.o):(.text+0x0): first defined here Solution: Copying a version of liblapack.a to my home directory and removing the offending symbol using ar, then using -noautolink to use the local version. I found the necessary libraries using -verbose. [complex:~/placer/ocaml]$ cp `locate liblapack.a` . [complex:~/placer/ocaml]$ ar t liblapack.a | grep xerbla.o xerbla.o [complex:~/placer/ocaml]$ ar d liblapack.a xerbla.o [complex:~/placer/ocaml]$ ar t liblapack.a | grep xerbla.o [complex:~/placer/ocaml]$ The compilation command: ocamlopt \ -I /home/matsen/ocaml/bio/ -I /home/matsen/ocaml/common/ -I /usr/lib/ocaml/3.10.2/pcre/ -I /usr/lib/ocaml/3.10.2/gsl/ -I /usr/lib/ocaml/3.10.2/lacaml/ \ -noautolink \ -ccopt -static \ -cclib /usr/lib/ocaml/3.10.2/lacaml/liblacaml_stubs.a \ -cclib /home/matsen/placer/ocaml/liblapack.a \ -cclib /home/matsen/placer/ocaml/libblas.a \ -cclib /usr/lib/ocaml/3.10.2/gsl/libmlgsl.a \ -cclib /usr/lib/libgsl.a \ -cclib /usr/lib/libgslcblas.a \ -cclib /usr/lib/ocaml/3.10.2/libunix.a \ -cclib /usr/lib/ocaml/3.10.2/libbigarray.a \ -cclib /usr/lib/ocaml/3.10.2/pcre/libpcre_stubs.a \ -cclib /usr/lib/libpcre.a \ -cclib /usr/lib/gcc/i486-linux-gnu/4.3/libgfortran.a \ -cclib /usr/lib/ocaml/3.10.2/libasmrun.a \ -cclib /usr/lib/libm.a \ -cclib /usr/lib/libdl.a \ -cclib -L/home/matsen/ocaml/bio/ -ccopt -L/home/matsen/ocaml/common/ -ccopt -L/usr/lib/ocaml/3.10.2/pcre/ -ccopt -L/usr/lib/ocaml/3.10.2/glpk/ -ccopt -L/usr/lib/ocaml/3.10.2/gsl/ -ccopt -L/usr/lib/ocaml/3.10.2/lacaml/ pcre.cmxa bigarray.cmxa unix.cmxa gsl.cmxa lacaml.cmxa -o placer \ /home/matsen/ocaml/common/common_base.cmx /home/matsen/ocaml/bio/biobase.cmx base.cmx minimization.cmx integration.cmx /home/matsen/ocaml/bio/liketree.cmx liketreeFuns.cmx /home/matsen/ocaml/common/number.cmx /home/matsen/ocaml/common/mat.cmx /home/matsen/ocaml/bio/diagd.cmx /home/matsen/ocaml/bio/qtree.cmx /home/matsen/ocaml/bio/protModels.cmx /home/matsen/ocaml/bio/alignment.cmx /home/matsen/ocaml/bio/alignmentLike.cmx placerFuns.cmx placer.cmx