Unknown command line argument '-x86-pad-for-align=false'

Hi,

I got an error when running MadGraph. The error exists in both versions 3.3.2 and 3.1.0.
The details of the error are copied below. Could anyone please help to solve the problem?
Let me know if you need any further details.

Thank you very much!

--------------------------------

Error detected in "generate_events run_01"
write debug file /Users/xqj/Dropbox/1acdm/1work/MG_work/vmsTOmuj_Nf6/run_01_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
str : A compilation Error occurs when trying to compile /Users/xqj/Dropbox/1acdm/1work/MG_work/vmsTOmuj_Nf6/Source.
 The compilation fails with the following output message:
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o StringCast.o StringCast.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o ranmar.o ranmar.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o alfas_functions_lhapdf.o alfas_functions_lhapdf.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o transpole.o transpole.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o invarients.o invarients.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o hfill.o hfill.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o pawgraphs.o pawgraphs.f
     gfortran -w -fPIC -O -ffixed-line-length-132 -c -o ran1.o ran1.f
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [alfas_functions_lhapdf.o] Error 1
     make: *** Waiting for unfinished jobs....
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [ran1.o] Error 1
     make: *** [pawgraphs.o] Error 1
     make: *** [hfill.o] Error 1
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [StringCast.o] Error 1
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [transpole.o] Error 1
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [ranmar.o] Error 1
     clang (LLVM option parsing): Unknown command line argument '-x86-pad-for-align=false'. Try: 'clang (LLVM option parsing) --help'
     clang (LLVM option parsing): Did you mean '--x86-slh-loads=false'?
     make: *** [invarients.o] Error 1

 Please try to fix this compilations issue and retry.
 Help might be found at https://answers.launchpad.net/mg5amcnlo.
 If you think that this is a bug, you can report this at https://bugs.launchpad.net/mg5amcnlo