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I tried that and got pretty much the same error (unrecognized command line option '--warn-'):
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<blockquote style="margin-top:0;margin-bottom:0" class="ContentPasted1">(cp -r ./src ./for-qe-6.1-mpi; cp makefiles/Makefile.for-qe-6.1 ./for-qe-6.1-mpi; \
<div class="ContentPasted1"> cd ./for-qe-6.1-mpi; pwd; make -f Makefile.for-qe-6.1 kgec.x || exit 1)</div>
<div class="ContentPasted1">/home/fes33/Software/KGECDIR/for-qe-6.1-mpi</div>
<div class="ContentPasted1">make[1]: Entering directory '/home/fes33/Software/KGECDIR/for-qe-6.1-mpi'</div>
<div class="ContentPasted1">mpif90 -O3 -g -x f95-cpp-input -D__FFTW3 -D__MPI -I/home/fes33/Software/6.1-mpi//include -I../include/ -D__QE6 -c qevars.f90 -o qevars.o -I /home/fes33/Software/6.1-mpi/Modules -I /home/fes33/Software/6.1-mpi/PW/src -I ../src /home/fes33/Software/6.1-mpi/PW/src/libpw.a
/home/fes33/Software/6.1-mpi/Modules/libqemod.a /home/fes33/Software/6.1-mpi/FFTXlib/libqefft.a /home/fes33/Software/6.1-mpi/LAXlib/libqela.a --warn- all</div>
<div class="ContentPasted1">gfortran: error: all: No such file or directory</div>
<div class="ContentPasted1">gfortran: error: unrecognized command line option --warn-</div>
<div class="ContentPasted1">make[1]: *** [Makefile.for-qe-6.1:42: qevars.o] Error 1</div>
<div class="ContentPasted1">make[1]: Leaving directory '/home/fes33/Software/KGECDIR/for-qe-6.1-mpi'</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Paolo Giannozzi <paolo.giannozzi@uniud.it><br>
<b>Sent:</b> Wednesday, February 1, 2023 3:46 PM<br>
<b>To:</b> Quantum ESPRESSO users Forum <users@lists.quantum-espresso.org>; Mr. Sheharyar Pervez RA FES <sheharyar@giki.edu.pk><br>
<b>Subject:</b> Re: [QE-users] Error Installing KGEC</font>
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<div class="PlainText">On 01/02/2023 11:40, Mr. Sheharyar Pervez RA FES wrote:<br>
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> gfortran: error: all: No such file or directory<br>
> gfortran: error: unrecognized command line option -warn; did you<br>
> mean --warn-?<br>
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you have the problem and the solution here<br>
-- <br>
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
Univ. Udine, via delle Scienze 206, 33100 Udine Italy, +39-0432-558216<br>
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