Issue creating f2py shared object file when linking to libraries and modules
I am able to compile a fortran program normally with these commands:
ifort -O2 -I/work/GSI/include -c create_upperair.f90
ifort -o create_upperair.exe -O2 create_upperair.o -L/work/GSI/lib -lbufr
I am trying to take the same fortran program, but compile it as a python shared object file so that I can call this subroutine from a python script. However the f2py command is giving me issues.
Here is the command I am currently using:
f2py -c -L/work/GSI/lib -lbufr -I/work/GSI/include --f90flags=-O2 --fcompiler=ifort -m create_upperair create_upperair.f90
However that prints out errors at the end of the f2py command with something like:
ld: /work/GSI/lib/libbufr.a(closbf.o): relocation R_X86_64_32S against `nulbfr_' can not be used when making a shared object: recompile with -fPIC
I tried to add --f90flags="-O2 -fPIC" to my f2py command, but it didn't work either. Any ideas of what direction to go with this problem would be much appreciated.
Here is the full error at the end of f2py (note that I changed a few directory names above for simplicity):
ifort:f90: prepbufr_encode_upperair.f90
/glade/apps/opt/modulefiles/ys/cmpwrappers/ifort -shared -shared -nofor_main /tmp/tmpzYKBY5/tmp/tmpzYKBY5/src.linux-x86_64-2.7/prepbufr_encode_upperairmodule.o /tmp/tmpzYKBY5/tmp/tmpzYKBY5/src.linux-x86_64-2.7/fortranobject.o /tmp/tmpzYKBY5/prepbufr_encode_upperair.o - L/glade/p/work/sdegelia/softwares/comGSI_v3.3/lib -L/glade/apps/opt/python/2.7.7/gnu-westmere/4.8.2/lib -lbufr_i4r8 -lpython2.7 -o ./prepbufr_encode_upperair.so
ld: /glade/p/work/sdegelia/softwares/comGSI_v3.3/lib/libbufr_i4r8.a(closbf.o): relocation R_X86_64_32S against `nulbfr_' can not be used when making a shared object; recompile with -fPIC
/glade/p/work/sdegelia/softwares/comGSI_v3.3/lib/libbufr_i4r8.a: could not read symbols: Bad value
ld: /glade/p/work/sdegelia/softwares/comGSI_v3.3/lib/libbufr_i4r8.a(closbf.o): relocation R_X86_64_32S against `nulbfr_' can not be used when making a shared object; recompile with -fPIC
/glade/p/work/sdegelia/softwares/comGSI_v3.3/lib/libbufr_i4r8.a: could not read symbols: Bad value
error: Command "/glade/apps/opt/modulefiles/ys/cmpwrappers/ifort -shared -shared -nofor_main /tmp/tmpzYKBY5/tmp/tmpzYKBY5/src.linux-x86_64-2.7/prepbufr_encode_upperairmodule.o /tmp/tmpzYKBY5/tmp/tmpzYKBY5/src.linux-x86_64-2.7/fortranobject.o /tmp/tmpzYKBY5/prepbufr_encode_upperair.o -L/glade/p/work/sdegelia/softwares/comGSI_v3.3/lib -L/glade/apps/opt/python/2.7.7/gnu-westmere/4.8.2/lib -lbufr_i4r8 -lpython2.7 -o ./prepbufr_encode_upperair.so" failed with exit status 1
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