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Cannot pip install ffnet on Big Sur #8

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johncoxon opened this issue Dec 21, 2020 · 1 comment
Closed

Cannot pip install ffnet on Big Sur #8

johncoxon opened this issue Dec 21, 2020 · 1 comment

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@johncoxon
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Trying to install ffnet on Big Sur using gcc 10.2.0 (installed with homebrew), and getting the following errors in Terminal. How can I troubleshoot this?

John@Yavin ~ % pip install ffnet
Collecting ffnet
  Using cached ffnet-0.8.4.tar.gz (55 kB)
Building wheels for collected packages: ffnet
  Building wheel for ffnet (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: /Users/John/opt/anaconda3/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"'; __file__='"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-wheel-mi6sr06d
       cwd: /private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/
  Complete output (298 lines):
  running bdist_wheel
  running build
  running config_cc
  unifing config_cc, config, build_clib, build_ext, build commands --compiler options
  running config_fc
  unifing config_fc, config, build_clib, build_ext, build commands --fcompiler options
  running build_src
  build_src
  building extension "ffnet.fortran._ffnet" sources
  f2py options: []
  f2py:> build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c
  creating build
  creating build/src.macosx-10.9-x86_64-3.8
  creating build/src.macosx-10.9-x86_64-3.8/ffnet
  creating build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
  Reading fortran codes...
  	Reading file 'ffnet/fortran/ffnet.f' (format:fix,strict)
  Post-processing...
  	Block: _ffnet
  			Block: prop
  			Block: sqerror
  			Block: grad
  			Block: recall
  			Block: diff
  			Block: func
  			Block: func2
  			Block: pikaiaff
  			Block: normcall
  			Block: normdiff
  			Block: normcall2
  			Block: normdiff2
  			Block: momentum
  			Block: rprop
  			Block: setin
  			Block: getout
  			Block: mapa
  			Block: dmapa
  			Block: vmapa
  			Block: mmapa
  Post-processing (stage 2)...
  Building modules...
  	Building module "_ffnet"...
  		Constructing wrapper function "prop"...
  		  units = prop(x,conec,units,[n,u])
  		Constructing wrapper function "sqerror"...
  		  sqerr = sqerror(x,conec,units,inno,outno,input,targ,[n,u,i,o,p])
  		Constructing wrapper function "grad"...
  		  xprime = grad(x,conec,bconecno,units,inno,outno,input,targ,[n,bn,u,i,o,p])
  		Constructing wrapper function "recall"...
  		  output = recall(x,conec,units,inno,outno,input,[n,u,i,o])
  		Constructing wrapper function "diff"...
  		  deriv = diff(x,conec,dconecno,dconecmk,units,inno,outno,input,[n,dn,u,i,o])
  		Constructing wrapper function "func"...
  		  sqerr = func(x,conec,bconecno,units,inno,outno,input,targ,[n,bn,u,i,o,p])
  		Constructing wrapper function "func2"...
  		  sqerr,xprime = func2(x,conec,bconecno,units,inno,outno,input,targ,[n,bn,u,i,o,p])
  		Constructing wrapper function "pikaiaff"...
  		  isqerr = pikaiaff(x,ffn,conec,units,inno,outno,input,targ,bound1,bound2,[n,u,i,o,p])
  		Constructing wrapper function "normcall"...
  		  output = normcall(x,conec,units,inno,outno,eni,deo,input,[n,u,i,o])
  		Constructing wrapper function "normdiff"...
  		  deriv = normdiff(x,conec,dconecno,dconecmk,units,inno,outno,eni,ded,input,[n,dn,u,i,o])
  		Constructing wrapper function "normcall2"...
  		  output = normcall2(x,conec,units,inno,outno,eni,deo,input,[n,u,i,o,p])
  		Constructing wrapper function "normdiff2"...
  		  deriv = normdiff2(x,conec,dconecno,dconecmk,units,inno,outno,eni,ded,input,[n,dn,u,i,o,p])
  		Constructing wrapper function "momentum"...
  		  x = momentum(x,conec,bconecno,units,inno,outno,input,targ,eta,moment,maxiter,[n,bn,u,i,o,p])
  		Constructing wrapper function "rprop"...
  		  x,xmi = rprop(x,conec,bconecno,units,inno,outno,input,targ,a,b,mimin,mimax,xmi,maxiter,[n,bn,u,i,o,p])
  		Constructing wrapper function "setin"...
  		  units = setin(input,inno,eni,units,[i,u])
  		Constructing wrapper function "getout"...
  		  output = getout(units,outno,deo,[u,o])
  		Creating wrapper for Fortran function "mapa"("mapa")...
  		Constructing wrapper function "mapa"...
  		  mapa = mapa(f,a,b,c,d)
  		Creating wrapper for Fortran function "dmapa"("dmapa")...
  		Constructing wrapper function "dmapa"...
  		  dmapa = dmapa(f,a,b,c,d)
  		Constructing wrapper function "vmapa"...
  		  vout = vmapa(vin,a,b,c,d,[n])
  		Constructing wrapper function "mmapa"...
  		  mmout = mmapa(mmin,a,b,c,d,[m,n])
  	Wrote C/API module "_ffnet" to file "build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c"
  	Fortran 77 wrappers are saved to "build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.f"
    adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c' to sources.
    adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran' to include_dirs.
  creating build/src.macosx-10.9-x86_64-3.8/build
  creating build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8
  creating build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet
  creating build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
  copying /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c -> build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
  copying /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.h -> build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
    adding 'build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.f' to sources.
  building extension "ffnet.fortran._pikaia" sources
  f2py options: []
  f2py:> build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_pikaiamodule.c
  Reading fortran codes...
  	Reading file 'ffnet/fortran/pikaia.f' (format:fix,strict)
  Line #14 in ffnet/fortran/pikaia.f:"      external twod"
  	analyzeline: ignoring program arguments
  rmbadname1: Replacing "new" with "new_bn".
  rmbadname1: Replacing "new" with "new_bn".
  rmbadname1: Replacing "rank" with "rank_bn".
  rmbadname1: Replacing "rank" with "rank_bn".
  Post-processing...
  	Block: _pikaia
  			Block: xpkaia
  			Block: twod
  			Block: urand
  			Block: rninit
  			Block: ran0
  			Block: rqsort
  			Block: pikaia
  					Block: ff
  			Block: setctl
  			Block: report
  			Block: encode
  			Block: decode
  			Block: cross
  			Block: mutate
  			Block: adjmut
  			Block: select
  			Block: rnkpop
  			Block: genrep
  			Block: stdrep
  					Block: ff
  			Block: newpop
  					Block: ff
  Post-processing (stage 2)...
  Building modules...
  	Constructing call-back function "cb_ff_in_pikaia__user__routines"
  	  def ff(x,[n]): return f
  	Constructing call-back function "cb_ff_in_stdrep__user__routines"
  	  def ff(x,[n]): return f
  	Constructing call-back function "cb_ff_in_newpop__user__routines"
  	  def ff(x,[n]): return f
  	Building module "_pikaia"...
  		Creating wrapper for Fortran function "twod"("twod")...
  		Constructing wrapper function "twod"...
  		  twod = twod(x,[n])
  		Creating wrapper for Fortran function "urand"("urand")...
  		Constructing wrapper function "urand"...
  		  urand = urand()
  		Constructing wrapper function "rninit"...
  		  rninit(seed)
  		Creating wrapper for Fortran function "ran0"("ran0")...
  		Constructing wrapper function "ran0"...
  		  ran0 = ran0(seed)
  		Constructing wrapper function "rqsort"...
  		  p = rqsort(a,[n])
  		Constructing wrapper function "pikaia"...
  		  x,f,status = pikaia(ff,n,ctrl,[ff_extra_args])
  		Constructing wrapper function "setctl"...
  		  setctl(ctrl,n,np,ngen,nd,pcross,pmutmn,pmutmx,pmut,imut,fdif,irep,ielite,ivrb,status)
  		Constructing wrapper function "report"...
  		  report(ivrb,n,nd,oldph,fitns,ifit,pmut,ig,nnew,[ndim,np])
  		Constructing wrapper function "encode"...
  		  encode(nd,ph,gn,[n])
  		Constructing wrapper function "decode"...
  		  decode(nd,gn,ph,[n])
  		Constructing wrapper function "cross"...
  		  cross(n,nd,pcross,gn1,gn2)
  		Constructing wrapper function "mutate"...
  		  mutate(n,nd,pmut,gn,imut)
  		Constructing wrapper function "adjmut"...
  		  adjmut(n,oldph,fitns,ifit,pmutmn,pmutmx,pmut,imut,[ndim,np])
  		Constructing wrapper function "select"...
  		  select(jfit,fdif,idad,[np])
  		Constructing wrapper function "rnkpop"...
  		  rnkpop(arrin,indx,rank_bn,[n])
  		Constructing wrapper function "genrep"...
  		  genrep(n,ip,ph,newph,[ndim,np])
  		Constructing wrapper function "stdrep"...
  		  stdrep(ff,n,irep,ielite,ph,oldph,fitns,ifit,jfit,nnew,[ndim,np,ff_extra_args])
  		Constructing wrapper function "newpop"...
  		  newpop(ff,ielite,n,oldph,newph,ifit,jfit,fitns,nnew,[ndim,np,ff_extra_args])
  		Constructing COMMON block support for "rnseed"...
  		  iseed
  	Wrote C/API module "_pikaia" to file "build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_pikaiamodule.c"
  	Fortran 77 wrappers are saved to "build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_pikaia-f2pywrappers.f"
    adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c' to sources.
    adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran' to include_dirs.
    adding 'build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_pikaia-f2pywrappers.f' to sources.
  build_src: building npy-pkg config files
  running build_py
  creating build/lib.macosx-10.9-x86_64-3.8
  creating build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/pikaia.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/_version.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/_py2f.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/__init__.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/_mpprop.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/ffnet.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/_tests.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  copying ffnet/graphs.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet
  creating build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran
  copying ffnet/fortran/__init__.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran
  copying ffnet/fortran/compile.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran
  package init file 'examples/__init__.py' not found (or not a regular file)
  creating build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying examples/mptrain.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying examples/stock.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying examples/ocr.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying examples/xor.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying examples/sin.py -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples
  copying ffnet/fortran/ffnet.f -> build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran
  copying ffnet/fortran/pikaia.f -> build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran
  creating build/lib.macosx-10.9-x86_64-3.8/ffnet/examples/data
  copying examples/data/black-scholes.dat -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples/data
  copying examples/data/ocr.dat -> build/lib.macosx-10.9-x86_64-3.8/ffnet/examples/data
  Skipping optional fixer: buffer
  Skipping optional fixer: idioms
  Skipping optional fixer: set_literal
  Skipping optional fixer: ws_comma
  package init file 'examples/__init__.py' not found (or not a regular file)
  running build_ext
  customize UnixCCompiler
  customize UnixCCompiler using build_ext
  get_default_fcompiler: matching types: '['gnu95', 'nag', 'absoft', 'ibm', 'intel', 'gnu', 'g95', 'pg']'
  customize Gnu95FCompiler
  Found executable /usr/local/bin/gfortran
  customize Gnu95FCompiler
  customize Gnu95FCompiler using build_ext
  building 'ffnet.fortran._ffnet' extension
  compiling C sources
  C compiler: gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/John/opt/anaconda3/include -arch x86_64 -I/Users/John/opt/anaconda3/include -arch x86_64
  
  creating build/temp.macosx-10.9-x86_64-3.8/build
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet
  creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
  compile options: '-Ibuild/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran -I/Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include -I/Users/John/opt/anaconda3/include/python3.8 -c'
  gcc: build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c
  gcc: build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c
  In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c:2:
  In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.h:13:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/arrayobject.h:4:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarraytypes.h:1822:
  /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: "Using deprecated NumPy API, disable it with "          "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
  #warning "Using deprecated NumPy API, disable it with " \
   ^
  In file included from build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c:16:
  In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.h:13:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/arrayobject.h:4:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
  In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarraytypes.h:1822:
  /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: "Using deprecated NumPy API, disable it with "          "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
  #warning "Using deprecated NumPy API, disable it with " \
   ^
  build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c:144:12: warning: unused function 'f2py_size' [-Wunused-function]
  static int f2py_size(PyArrayObject* var, ...)
             ^
  1 warning generated.
  2 warnings generated.
  compiling Fortran sources
  Fortran f77 compiler: /usr/local/bin/gfortran -Wall -g -ffixed-form -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
  Fortran f90 compiler: /usr/local/bin/gfortran -Wall -g -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
  Fortran fix compiler: /usr/local/bin/gfortran -Wall -g -ffixed-form -fno-second-underscore -Wall -g -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
  creating build/temp.macosx-10.9-x86_64-3.8/ffnet
  creating build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran
  compile options: '-Ibuild/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran -I/Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include -I/Users/John/opt/anaconda3/include/python3.8 -c'
  gfortran:f77: build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.f
  gfortran:f77: ffnet/fortran/ffnet.f
  f951: Warning: Nonconforming tab character in column 1 of line 232 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 244 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 266 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 474 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 487 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 509 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 623 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 663 [-Wtabs]
  f951: Warning: Nonconforming tab character in column 1 of line 814 [-Wtabs]
  ffnet/fortran/ffnet.f:285:43:
  
    285 |       subroutine func(x, conec, n, bconecno, bn, units, u, inno, i,
        |                                           1
  Warning: Unused dummy argument 'bconecno' at (1) [-Wunused-dummy-argument]
  ffnet/fortran/ffnet.f:385:32:
  
    385 |       subroutine pikaiaff(x, ffn, conec, n, units, u, inno, i, outno, o,
        |                                1
  Warning: Unused dummy argument 'ffn' at (1) [-Wunused-dummy-argument]
  ffnet/fortran/ffnet.f:754:22:
  
    754 |       function dmapa(f, a, b, c, d)
        |                      1
  Warning: Unused dummy argument 'f' at (1) [-Wunused-dummy-argument]
  /usr/local/bin/gfortran -Wall -g -arch x86_64 -Wall -g -undefined dynamic_lookup -bundle build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.o build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran/ffnet.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.o -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0 -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -lgfortran -o build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet.cpython-38-darwin.so
  ld: library not found for -lSystem
  collect2: error: ld returned 1 exit status
  error: Command "/usr/local/bin/gfortran -Wall -g -arch x86_64 -Wall -g -undefined dynamic_lookup -bundle build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.o build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran/ffnet.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.o -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0 -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -lgfortran -o build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet.cpython-38-darwin.so" failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for ffnet
  Running setup.py clean for ffnet
Failed to build ffnet
Installing collected packages: ffnet
    Running setup.py install for ffnet ... error
    ERROR: Command errored out with exit status 1:
     command: /Users/John/opt/anaconda3/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"'; __file__='"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-record-1xrro0eg/install-record.txt --single-version-externally-managed --compile --install-headers /Users/John/opt/anaconda3/include/python3.8/ffnet
         cwd: /private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/
    Complete output (103 lines):
    running install
    running build
    running config_cc
    unifing config_cc, config, build_clib, build_ext, build commands --compiler options
    running config_fc
    unifing config_fc, config, build_clib, build_ext, build commands --fcompiler options
    running build_src
    build_src
    building extension "ffnet.fortran._ffnet" sources
    f2py options: []
      adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c' to sources.
      adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran' to include_dirs.
      adding 'build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.f' to sources.
    building extension "ffnet.fortran._pikaia" sources
    f2py options: []
      adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c' to sources.
      adding 'build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran' to include_dirs.
      adding 'build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_pikaia-f2pywrappers.f' to sources.
    build_src: building npy-pkg config files
    running build_py
    package init file 'examples/__init__.py' not found (or not a regular file)
    package init file 'examples/__init__.py' not found (or not a regular file)
    running build_ext
    customize UnixCCompiler
    customize UnixCCompiler using build_ext
    get_default_fcompiler: matching types: '['gnu95', 'nag', 'absoft', 'ibm', 'intel', 'gnu', 'g95', 'pg']'
    customize Gnu95FCompiler
    Found executable /usr/local/bin/gfortran
    customize Gnu95FCompiler
    customize Gnu95FCompiler using build_ext
    building 'ffnet.fortran._ffnet' extension
    compiling C sources
    C compiler: gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/John/opt/anaconda3/include -arch x86_64 -I/Users/John/opt/anaconda3/include -arch x86_64
    
    creating build/temp.macosx-10.9-x86_64-3.8/build
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet
    creating build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran
    compile options: '-Ibuild/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran -I/Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include -I/Users/John/opt/anaconda3/include/python3.8 -c'
    gcc: build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c
    gcc: build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c
    In file included from build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c:16:
    In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.h:13:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/arrayobject.h:4:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarraytypes.h:1822:
    /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: "Using deprecated NumPy API, disable it with "          "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
    #warning "Using deprecated NumPy API, disable it with " \
     ^
    In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.c:2:
    In file included from build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.h:13:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/arrayobject.h:4:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
    In file included from /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/ndarraytypes.h:1822:
    /Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: "Using deprecated NumPy API, disable it with "          "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
    #warning "Using deprecated NumPy API, disable it with " \
     ^
    build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.c:144:12: warning: unused function 'f2py_size' [-Wunused-function]
    static int f2py_size(PyArrayObject* var, ...)
               ^
    1 warning generated.
    2 warnings generated.
    compiling Fortran sources
    Fortran f77 compiler: /usr/local/bin/gfortran -Wall -g -ffixed-form -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
    Fortran f90 compiler: /usr/local/bin/gfortran -Wall -g -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
    Fortran fix compiler: /usr/local/bin/gfortran -Wall -g -ffixed-form -fno-second-underscore -Wall -g -fno-second-underscore -arch x86_64 -fPIC -O3 -funroll-loops
    creating build/temp.macosx-10.9-x86_64-3.8/ffnet
    creating build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran
    compile options: '-Ibuild/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran -I/Users/John/opt/anaconda3/lib/python3.8/site-packages/numpy/core/include -I/Users/John/opt/anaconda3/include/python3.8 -c'
    gfortran:f77: ffnet/fortran/ffnet.f
    gfortran:f77: build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.f
    f951: Warning: Nonconforming tab character in column 1 of line 232 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 244 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 266 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 474 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 487 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 509 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 623 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 663 [-Wtabs]
    f951: Warning: Nonconforming tab character in column 1 of line 814 [-Wtabs]
    ffnet/fortran/ffnet.f:285:43:
    
      285 |       subroutine func(x, conec, n, bconecno, bn, units, u, inno, i,
          |                                           1
    Warning: Unused dummy argument 'bconecno' at (1) [-Wunused-dummy-argument]
    ffnet/fortran/ffnet.f:385:32:
    
      385 |       subroutine pikaiaff(x, ffn, conec, n, units, u, inno, i, outno, o,
          |                                1
    Warning: Unused dummy argument 'ffn' at (1) [-Wunused-dummy-argument]
    ffnet/fortran/ffnet.f:754:22:
    
      754 |       function dmapa(f, a, b, c, d)
          |                      1
    Warning: Unused dummy argument 'f' at (1) [-Wunused-dummy-argument]
    /usr/local/bin/gfortran -Wall -g -arch x86_64 -Wall -g -undefined dynamic_lookup -bundle build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.o build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran/ffnet.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.o -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0 -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -lgfortran -o build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet.cpython-38-darwin.so
    ld: library not found for -lSystem
    collect2: error: ld returned 1 exit status
    error: Command "/usr/local/bin/gfortran -Wall -g -arch x86_64 -Wall -g -undefined dynamic_lookup -bundle build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnetmodule.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/fortranobject.o build/temp.macosx-10.9-x86_64-3.8/ffnet/fortran/ffnet.o build/temp.macosx-10.9-x86_64-3.8/build/src.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet-f2pywrappers.o -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0 -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -L/usr/local/Cellar/gcc/10.2.0/lib/gcc/10/gcc/x86_64-apple-darwin20/10.2.0/../../.. -lgfortran -o build/lib.macosx-10.9-x86_64-3.8/ffnet/fortran/_ffnet.cpython-38-darwin.so" failed with exit status 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /Users/John/opt/anaconda3/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"'; __file__='"'"'/private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-install-wmcmbx16/ffnet/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/w3/68lsfws53359vchfqbcsh0rw0000gn/T/pip-record-1xrro0eg/install-record.txt --single-version-externally-managed --compile --install-headers /Users/John/opt/anaconda3/include/python3.8/ffnet Check the logs for full command output.
@johncoxon
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I followed the instructions at this StackOverflow question and the issue has been resolved; so it's a macOS bug, not an ffnet one.

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