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<p>Some possible causes:</p>
a) Installation is corrupt [
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/748744">https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/748744</a>
]<br>
- You might want to check your Intel installation and see if
the libifcore.so.5 file exists [
<a class="moz-txt-link-freetext" href="http://ladon.iqfr.csic.es/intel/doc/main_for/mergedProjects/bldaps_for/files_32.htm">http://ladon.iqfr.csic.es/intel/doc/main_for/mergedProjects/bldaps_for/files_32.htm</a>
]<br>
<p>Are you compiling with Intel MPI (mpiifort), OpenMPI (mpifort [
<a class="moz-txt-link-freetext" href="https://www.open-mpi.org/faq/?category=mpi-apps">https://www.open-mpi.org/faq/?category=mpi-apps</a> ]), or
MVAPICH2/MPICH (mpif90 [
<a class="moz-txt-link-freetext" href="http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.0-userguide.html#x1-220005.1">http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.0-userguide.html#x1-220005.1</a>
,
<a class="moz-txt-link-freetext" href="https://www.mpich.org/static/downloads/3.2.1/mpich-3.2.1-userguide.pdf">https://www.mpich.org/static/downloads/3.2.1/mpich-3.2.1-userguide.pdf</a>
("4 Compiling and Linking" on page 3) ])?</p>
<p>What WIEN2k compiler settings did you use?<br>
</p>
<p>b) It could be due to a problem with the mpi installation and
reinstalled might fix it such as was reported for MPICH [
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/593731">https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/593731</a>
]</p>
<p>c) It might be caused by the mpi program being built with the
wrong compiler (e.g., gfortran instead of ifort) or wrong compiler
version (e.g., ifort 2015 instead of 2018) as was mentioned for
OpenMPI [
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/590325">https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/590325</a>
]</p>
<p>d) Since it looks like -lifcore (libifcore.so.5) is needed to
provide the for_ifcore_version function, it may be that you need
to add "-lifcore" to your compiler settings [
<a class="moz-txt-link-freetext" href="https://www.psc.edu/phase2-earlyuser-info?id=2192">https://www.psc.edu/phase2-earlyuser-info?id=2192</a> (refer to
MVAPICH2 for Fortran in the Table under the "Compile with this
command" column) ].<br>
</p>
<div class="moz-cite-prefix">On 2/3/2018 3:11 AM, Nacir GUECHI
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1333896362.3520108.1517652705675@mail.yahoo.com">
<div style="font-family:times new roman, new york, times,
serif;font-size:16px;">
<div>
<div>Dear WIEN2k users,</div>
<div class="">
<div>I wanted to compile Wien2k with
"parallel_studio_xe_2018_update1_cluster_edition" but I
get the error:</div>
<div>/opt/intel_18/compilers_and_libraries_2018.1.148/linux/compiler/lib/intel64/libifport.so.5:
undefined reference to `for_ifcore_version'.</div>
<div class="">The environment variables are set in .bashrc
as:</div>
<div>source
/opt/intel_18/compilers_and_libraries_2018.1.148/linux/mpi/bin64/mpivars.sh<br>
<div>source
/opt/intel_18/compilers_and_libraries_2018.1.148/linux/bin/compilervars.sh
-arch intel64 -platform linux</div>
<div>What did I do wrong?<br>
</div>
</div>
</div>
</div>
</div>
</blockquote>
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