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Andreas Marek authored
As obvious from the previous commits, this release of ELPA introduces a (optional) QR-decomposition for real valued matrices. This option can be used at run-time by either setting an environment variable, or by calling the ELPA-2 solver for real matrices with an additional flag. Thus the ABI changed, w.r.t. previous versions. Furthermore, the build process of ELPA has been made more consistent. All optimization flags (especially O1, O2 etc.) have to be set at build time by the user via the CFLAGS, FCFLAGS, and CXXFLAGS variables. The configure script does not set automatically the "O-Flags" anymore.