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[Lapack] compiler options for thread safety


for the gfortran compiler the option -frecursive must be set at least
(or -fopenmp which implies it) to give a thread-save lapack. Without
that option ZGELS do not work in an openmp section.

Tested with: lapack-3.4.2 / gcc 4.7.1 & 4.8.0 / openSUSE 12.2 (x86_64)

Kind regards,

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