Hello, <div> I am trying to build on a Cray that is running Sles15 (sp6). My build keeps generating errors that make no sense. I just turned off ELPA with similar issues, but can not turn off the HPE (Cray) provided FFTW. The build knows wher the include files are (below) but still says they can not find them. Thanks for any insight.</div><div> Ray</div><div><br /></div><div>checking for FFTW3 include flags... -I'/opt/cray/pe/fftw/3.3.10.10/x86_rome/include'<br />checking for FFTW3 library flags... -lfftw3_mpi -lfftw3 -lfftw3_omp<br />checking fftw3.h usability... no<br />checking fftw3.h presence... no<br />checking for fftw3.h... no<br />checking whether we have a full FFTW3 support... no<br />configure: error: in `/N/soft/sles15sp6/cp2k/build/cp2k-2025.2/tools/toolchain/build/libvdwxc-0.4.0':<br />configure: error: FFTW3 is missing or incomplete<br />See `config.log' for more details<br />make: *** No targets specified and no makefile found. Stop.<br />make: *** No rule to make target 'install'. Stop.<br />/geode2/soft/hps/sles15sp6/cp2k/build/cp2k-2025.2/tools/toolchain/scripts/tool_kit.sh: line 680: /N/soft/sles15sp6/cp2k/build/cp2k-2025.2/tools/toolchain/install/libvdwxc-0.4.0/install_successful: No such file or directory<br /><br />[rsheppar@login2:26 toolchain]$ ls -l /opt/cray/pe/fftw/3.3.10.10/x86_rome/include<br />total 205<br />-rw-r--r-- 1 root root 2447 Feb 4 2025 fftw3.f<br />-rw-r--r-- 1 root root 55032 Feb 4 2025 fftw3.f03<br />-rw-r--r-- 1 root root 31986 Feb 4 2025 fftw3.h<br />-rw-r--r-- 1 root root 27203 Feb 4 2025 fftw3l.f03<br />-rw-r--r-- 1 root root 18678 Feb 4 2025 fftw3l-mpi.f03<br />-rw-r--r-- 1 root root 36969 Feb 4 2025 fftw3-mpi.f03<br />-rw-r--r-- 1 root root 9624 Feb 4 2025 fftw3-mpi.h<br />-rw-r--r-- 1 root root 25902 Feb 4 2025 fftw3q.f03<br />[rsheppar@login2:26 toolchain]$<br /></div>
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