gromacs: make single precision default value True.

easybuild/easyblocks/g/gromacs.py

@@ -63,7 +63,7 @@ def extra_options():
         extra_vars.update({
             'double_precision': [None, "Build with double precision enabled (-DGMX_DOUBLE=ON), " +
                                  "default is to build double precision unless CUDA is enabled", CUSTOM],
-            'single_precision': [None, "Build with single precision enabled (-DGMX_DOUBLE=OFF), " +
+            'single_precision': [True, "Build with single precision enabled (-DGMX_DOUBLE=OFF), " +
                                  "default is to build single precision", CUSTOM],
             'mpisuffix': ['_mpi', "Suffix to append to MPI-enabled executables (only for GROMACS < 4.6)", CUSTOM],
             'mpiexec': ['mpirun', "MPI executable to use when running tests", CUSTOM],
@@ -747,7 +747,7 @@ def run_all_steps(self, *args, **kwargs):
             }
 
         precisions = []
-        if self.cfg.get('single_precision') is None or self.cfg.get('single_precision'):
+        if self.cfg.get('single_precision'):
             precisions.append('single')
         if self.cfg.get('double_precision') is None or self.cfg.get('double_precision'):
             precisions.append('double')