abinit/config/optim/cxx_gnu_default-optim.conf

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#
# Optimization flags for the GNU C++ compiler, any version
#
# Identifiers are of the form <level>_<stage>, where <level> is one of
# the permitted debug levels, and <stage> is a build stage which may
# take the following values:
#
# * prep: for preprocessing;
# * comp: for compilation;
# * link: for linking.
#
# Each section of this file corresponds to a specific architecture. If
# no specific flags have been defined, the default ones will be applied.
# For a complete list of recognized architectures, please look at
# ~abinit/doc/build/architectures.txt.
#
[DEFAULT]
safe_comp = -O2
standard_comp = -O2 -march=native
aggressive_comp = -O3 -march=native