[petsc-users] multiple definition of `main' with intel compilers

[Satish Balay]

Do you get this error when building PETSc examples [C and/or fortran] - when you build them with the corresponding petsc makefile?

Can you send the log of the example compiles?

Satish

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On Thu, 21 May 2020, Alfredo Jaramillo wrote:

> dear PETSc team,
> 
> I have compiled PETSc with a 2016 version of the intel compilers. The
> installation went well, but when I tried to compile my code the following
> error appears in the final step of compilation (linking with ld)
> 
> ../build/linux_icc/obj_linux_icc_opt/main.o: In function `main':
> main.c:(.text+0x0): multiple definition of `main'
> /opt/intel/parallel_studio_xe_2016_update2/compilers_and_libraries_2016.2.181/linux/compiler/lib/intel64/libifcore_pic.a(for_main.o):for_main.c:(.text+0x0):
> first defined here
> /opt/intel/parallel_studio_xe_2016_update2/compilers_and_libraries_2016.2.181/linux/compiler/lib/intel64/libifcore_pic.a(for_main.o):
> In function `main':
> for_main.c:(.text+0x3e): undefined reference to `MAIN__'
> 
> I searched for this and I found that the option "-nofor_main" should be
> added when compiling with ifort, but our code is written only in C an C++.
> The FORTRAN compiler is used when PETSc compiles MUMPS. So I dont know if
> this would work for this case.
> 
> The configure.log file and the log of the compilation giving the error are
> attached to this message. These logs were obtained in a cluster, I'm
> getting the same error on my personal computer with a 2020 version of the
> Intel Parallel Studio.
> 
> thank you for any help on this
> Alfredo
>