To use GNU Fortran Compiler with Abaqus the compiler and linker options in Abaqus config file must be modified. The following statements added to global (lnx86_64.env) or local (abaqus_v6.env) Abaqus configuration files enables to compile and to link Abaqus user subroutines on Linux using GFortran:
import os
abaHomeInc = os.path.abspath(os.path.join(os.environ.get('ABA_HOME', ''), os.pardir))
fortCmd = "gfortran"
compile_fortran = [fortCmd,
'-c', '-cpp', '-fPIC','-extend-source',
'-DABQ_LNX86_64', '-DABQ_FORTRAN',
'-fautomatic',
'-mno-fma',
'-fprotect-parens',
'-fstack-protector-strong',
'-msse3',
'-mavx', '-mavx2',
'-ffixed-line-length-none',
'-I%I', '-I'+abaHomeInc, '%P']
link_sl = [fortCmd,
'-fPIC', '-shared','-Wl,--add-needed',
'%E', '-Wl,-soname,%U', '-o', '%U', '%F', '%A', '%L', '%B',
'-Wl,-Bdynamic']
link_exe = [fortCmd,
'-fPIC',
'-Wl,-Bdynamic', '-Wl,--add-needed', '-o', '%J', '%F', '%M', '%L', '%B', '%O']
del fortCmd
del abaHomeInc
To debug a subroutine, it must be compiled with -g option to produce debugging information. In the case of GDB you can use -ggdb3 to produce debugging information for use by GDB specifically. It can be done by modifying Abaqus environment variable compile_fortran in Abaqus environment file:
compile_fortran=compile_fortran + ['-ggdb3', '-std=legacy', '-fcheck=all', '-fbacktrace', '-static']
More about debugging Abaqus usersubroutines on Linux can be found here.
The easiest way to set it up is to put the provided here abaqus_v6.env file to your home directory or directory where you run Abaqus with subroutines. If you have abaqus_v6.env already, copy the statements which define and delete variables to your abaqus_v6.env file.
To check if it works correctly run the command:
$ abaqus verify user_std user_exp make
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Abaqus Product Verification
Mon 17 Jan 2022 10:11:25 PM CET
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Verify test : Abaqus/Standard with user subroutines verification
result : PASS
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Verify test : Abaqus/Explicit with user subroutines verification
- 'Abaqus/Explicit single precision user subroutine' completed, validation Succeeded
- 'Abaqus/Explicit double precision user subroutine' completed, validation Succeeded
result : PASS
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Verify test : Abaqus make utility verification
- 'Abaqus make C++ verification' completed, validation Succeeded
- 'Abaqus make C++ PostProcess Application' completed, validation Succeeded
- 'Abaqus make Fortran verification' completed, validation Succeeded
- 'Abaqus make Fortran PostProcess Application' completed, validation Succeeded
- 'Abaqus make object file verification' completed, validation Succeeded
- 'Abaqus make object file PostProcess Application' completed, validation Succeeded
result : PASS
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Verification procedure complete
Mon 17 Jan 2022 10:11:54 PM CET
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Happy coding!