CESM case_build error: linking to Fortran libraries from C fails

[Jeline]

Dear CESM scientists,

I am a beginner and I am compiling CESM on my personal workstation. I encountered problems during the case_build stage. The code version I used is release-cesm2.1.5-0-g7a6c5b0 and the compiler is Intel icx, icpx, and ifx.

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This part is my description of the problem

I used the command as follows:

1. ./create_newcase --compset FWHIST --res f09_f09_mg17 --case $HOME/cases/my_fates_case --run-unsupported
2. ./case.setup
3. ./case.build

error occurred in the step "./case.build", it shows:
ERROR: /home/loopy/my_cesm_sandbox/cime/src/build_scripts/buildlib.mct FAILED, cat /home/loopy/cesm_files/output/my_fates_case/bld/mct.bldlog.250705-152404

Then I used the command "cat /home/loopy/cesm_files/output/my_fates_case/bld/mct.bldlog.250705-152404", it shows:

configure: error: in /home/loopy/cesm_files/output/my_fates_case/bld/intel/impi/nodebug/nothreads/mct:
configure: error: linking to Fortran libraries from C fails

I checked the compiler configuration and it seems to be fine.：

• "which ifx" shows "/opt/intel/oneapi/compiler/2025.1/bin/ifx"
• "which icx" shows "/opt/intel/oneapi/compiler/2025.1/bin/icx"
• "mpif90 --version" shows ifx (IFX) 2025.1.1 20250418 Copyright (C) 1985-2025 Intel Corporation. All rights reserved

Why is this error being reported? How can I resolve it?
The following are some potentially helpful pieces of information.

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This part represents the modifications I made in the source tree

I modified the 4 files config_machines.xml, config_compilers.xml, config_batch.xml, env_mach_specific.xml as follows:

1- Add at the end of config_machines.xml:
<machine MACH="DESKTOP-P88ELI9">
<DESC>test</DESC>
<OS>LINUX</OS>
<COMPILERS>intel</COMPILERS>
<MPILIBS>impi</MPILIBS>
<PROJECT>none</PROJECT>
<NODENAME_REGEX>.*</NODENAME_REGEX>
<MAX_TASKS_PER_NODE>48</MAX_TASKS_PER_NODE>
<MAX_MPITASKS_PER_NODE>48</MAX_MPITASKS_PER_NODE>
<DIN_LOC_ROOT>/home/loopy/my_cesm_sandbox/inputdata</DIN_LOC_ROOT>
<DIN_LOC_ROOT_CLMFORC>/home/loopy/my_cesm_sandbox/inputdata/atm/datm7</DIN_LOC_ROOT_CLMFORC>
<DOUT_S_ROOT>/home/loopy/cesm_files/output/${CASE}</DOUT_S_ROOT>
<BASELINE_ROOT>/home/loopy/cesm_files/output/cesm_baselines</BASELINE_ROOT>
<CCSM_CPRNC>/home/loopy/cesm_files/output/cprnc</CCSM_CPRNC>
<GMAKE>make</GMAKE>
<GMAKE_J>8</GMAKE_J>
<BATCH_SYSTEM>none</BATCH_SYSTEM>
<SUPPORTED_BY>loopy</SUPPORTED_BY>
<PROJECT_REQUIRED>FALSE</PROJECT_REQUIRED>
<mpirun mpilib="impi">
<executable>mpirun</executable>
<arguments>
<arg name="num_tasks" > -n {{ total_tasks }}</arg>
</arguments>
</mpirun>
<module_system type="none"></module_system>
<environment_variables>
<env name="OMP_STACKSIZE">256M</env>
<env name="NETCDF_C_PATH">/home/loopy/cesm_deps_intel/netcdf-c</env>
<env name="NETCDF_FORTRAN_PATH">/home/loopy/cesm_deps_intel/netcdf-fortran</env>
<env name="INC_NETCDF">/home/loopy/cesm_deps_intel/netcdf-fortran/include</env>
<env name="LIB_NETCDF">/home/loopy/cesm_deps_intel/netcdf-fortran/lib:/home/loopy/cesm_deps_intel/netcdf-c/lib</env>
<env name="PNETCDF_PATH">/home/loopy/cesm_deps_intel/pnetcdf</env>
<env name="HDF5_PATH">/home/loopy/cesm_deps_intel/hdf5</env>
<env name="ZLIB_PATH">/home/loopy/cesm_deps_intel/zlib</env>
<env name="ESMF_PATH">/home/loopy/esmf-8.8.1</env>
</environment_variables>
</machine>

2- Add at the end of config_compilers：
<compiler COMPILER="intel" MACH="DESKTOP-P88ELI9">
<CPPDEFS>
<append>-DLINUX</append>
</CPPDEFS>
<LDFLAGS>
<append compile_threaded="true"> -fopenmp </append>
<append> -mkl </append>
</LDFLAGS>
<CFLAGS>
<append DEBUG="FALSE"> -O2 </append>
</CFLAGS>
<CONFIG_ARGS>
<base> --host=Linux </base>
</CONFIG_ARGS>
<FFLAGS>
<append DEBUG="FALSE"> -O2 </append>
</FFLAGS>

<MPICC> mpiicx </MPICC>
<MPICXX> mpiicpx </MPICXX>
<MPIFC> mpiifx </MPIFC>
<SCC> icx </SCC>
<SCXX> icpx </SCXX>
<SFC> ifx </SFC>
<ESMF_LIBDIR>/home/loopy/cesm_deps_intel/esmf/bin/binO/Linux.intel.64.mpi.default</ESMF_LIBDIR>
<MPI_PATH>/opt/intel/oneapi/mpi/2021.15</MPI_PATH>
<NETCDF_C_PATH>/home/loopy/cesm_deps_intel/netcdf-c</NETCDF_C_PATH>
<NETCDF_FORTRAN_PATH>/home/loopy/cesm_deps_intel/netcdf-fortran</NETCDF_FORTRAN_PATH>
<PNETCDF_PATH>/home/loopy/cesm_deps_intel/pnetcdf</PNETCDF_PATH>

<SLIBS>
<append>-L/home/loopy/cesm_deps_intel/netcdf-c/lib -lnetcdf -L/home/loopy/cesm_deps_intel/netcdf-fortran/lib -lnetcdff -L/home/-L/home/loopy/cesm_deps_intel/hdf5/lib -lhdf5 -lhdf5_hl -L/home/loopy/cesm_deps_intel/zlib/lib -lz -L/opt/intel/oneapi/mkl/2025.1/lib/intel64 -llapack</append>
</SLIBS>
</compiler>

3- Add at the end of config_batch.xml：
<batch_system MACH="DESKTOP-P88ELI9" type="none">
<batch_submit>bash</batch_submit>
</batch_system>

4- Add in the env_mach_specific.xml：
<env name="FC">mpiifx</env>
<env name="F77">mpiifx</env>
<env name="CC">mpiicx</env>
<env name="CXX">mpiicpx</env>
<env name="LDFLAGS">-L/opt/intel/oneapi/mkl/2025.1/lib/intel64 -lifcore -lifport -lstdc++</env>

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The attachment includes the mct.bldlog file which shows the compilation error messages, as well as the four modified XML files that I have made. (Except for config_batch.xml, since this error is not related to it.)

Thanks for your help soooooooo much!

 

[jedwards]

mct will have created a file config.log in directory bld/intel/impi/nodebug/nothreads/mct check that file as suggested in the mct bld log.