Serial version of QE is compiled instead of parallel Running ./configure in the QE directory should automatically find all the necessary libraries needed for compiling the QE. It chooses the best version available on your computer or node etc., provided those libraries are in the standard path. In most of the cases in custom built clusters, packages are not maintained by the OS package management. It may have been compiled and may be present in the non-standard directories Even if the path to libraries are mentioned in LD_PATH, sometimes auto configure fails to recognize correct path to libraries installed on the computer. In the present situation ./congifure is failing to recognize the correct path to MPI libraries. You can add the MPI library path during configuration with the MPI_LIBS="/path/to/library/" or change the MPI_LIBS= "/path/to/library/" in make.sys after running the ./congifure . At the end of the...
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