Server Processors

[yaoming_019]

Hello everyone,

When I compile vasp-5.4.4 with aocc4.0 on amd-zen2 platform,I get an error：

ld.lld: error: undefined symbol: MAIN_
>>> referenced by flangmain.c:59 (/home/amd/JENKINS/workspace/AOCC_4_0_0_INTERIM/flang/runtime/flangmain/flangmain.c:59)
>>> flangmain.c.o:(main) in archive /home/xxx/amd/aocc-compiler-4.0.0/bin/../lib/libflangmain.a
>>> did you mean: MAIN__
>>> defined in: /home/xxx/amd/aocc-compiler-4.0.0/bin/../lib/libflangrti.so
clang-14: error: linker command failed with exit code 1 (use -v to see invocation)

Is this a bug in the compiler itself?

[dipak]

Thank you for reaching out.

For AOCC related support, the AMD Server Gurus   community is the right place to post any query/issue. I'm moving this post there.

Thanks.

[ppxxyy123]

Hello,I met the same problem and use this method,but I still can't solve the problem. Can you give me other advice? Thank you.

[santosh_zanjurne]

Hello, Are you using the same application?

[ppxxyy123]

Yes, but I can't solve the problem by changing the configuration file.

[ppxxyy123]

Yes, but I can't solve the problem by the answer.

[somanath]

Hi @ppxxyy123, are you still facing issue with above solution provided? 

if yes please share the exact error message and build log. 

[santosh_zanjurne · Accepted solution]

Hello Yaoming,

Can experiment with below changes in your configuration file?

        CPP        = flang -E -P -C -w -Mfree $*$(FUFFIX) >$*$(SUFFIX) $(CPP_OPTIONS)

        FC         = mpif90 -fopenmp

        FCL        = mpif90 -fopenmp

        FREE       = -ffree-form -ffree-line-length-none

        FFLAGS     = -w -march=znver3 -fno-fortran-main $(CPP_OPTIONS) -Mbackslash -ffunc-args-alias

[yaoming_019]

Thanks for your reply.

This configuration file is indeed valid. The reason for this error is that clang cannot convert the .F file into a .f90 file. What I want to ask you is which compilation option makes its compilation pass.

This is my first time in the community, so I don't know if the message to ask you for advice has been sent out, but this question is very urgent for me, so I have to ask again.

[davidnormal]

If you change clang to flang then it work as preprocessor (I don't know why this behavior change). But my compilation end at incar_reader where it indicate parathensis not match

[davidnormal]

Same problem, seems the fortran preprocessor give empty output in AOCC 4.0 

Any flag for the preprocessor changed?

[santosh_zanjurne]

Hello David,

Does the post marked as solution in this thread help you?

[davidnormal]

yes this does solve the problem, thanks!