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I am trying to link against the BLAS and LAPACK libraries using the makefile

FFLAGS = -O0 -fcheck=all -ffree-line-length-none

PROJECTDIR = .
srcdir     = $(PROJECTDIR)/src

debug:
    gfortran -c $(FFLAGS) $(srcdir)/foo.f90
    gfortran -c $(FFLAGS) $(srcdir)/bar.f90
    gfortran -c $(FFLAGS) $(srcdir)/foobar.f90
    gfortran -o debug *.o -lblas -llapack
    rm -f *.o *.mod

When I run make I get that ld: library not found for -lblas. I ran brew info openblas and saw that

openblas is keg-only, which means it was not symlinked into /usr/local,
because macOS provides BLAS in Accelerate.framework.

For compilers to find openblas you may need to set:
  export LDFLAGS="-L/usr/local/opt/openblas/lib"
  export CPPFLAGS="-I/usr/local/opt/openblas/include"

So, I modified (also based on this post) the makefile to include the LDFLAGS

FFLAGS = -O0 -fcheck=all -ffree-line-length-none
LDFLAGS=  -L/usr/local/opt/lapack/lib -llapack -L/usr/local/opt/openblas/lib -lblas

debug:
    gfortran -c $(FFLAGS) $(srcdir)/foo.f90
    gfortran -c $(FFLAGS) $(srcdir)/bar.f90
    gfortran -c $(FFLAGS) $(srcdir)/foobar.f90
    gfortran -o debug *.o $(LDFLAGS)
    rm -f *.o *.mod

Now I get that ld: library not found for -lSystem. I also tried using the suggested Accelerate framework by using LDFLAGS = -framework Accelerate. When I did that I received that ld: framework not found Accelerate.

Any suggestions for correctly linking these libraries is greatly appreciated.

Vladimir F Героям слава
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Tiberiu
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1 Answers1

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I followed the answer of Mead from this post and ran brew install gfortran and that solved the issue for me.

Tiberiu
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