Add -march=native everywhere.

Author: sv2518

pyop2/compilation.py

@@ -393,7 +393,7 @@ class LinuxCompiler(Compiler):
     :kwarg comm: Optional communicator to compile the code on (only
     rank 0 compiles code) (defaults to COMM_WORLD)."""
     def __init__(self, cppargs=[], ldargs=[], cpp=False, comm=None):
-        opt_flags = ['-O3', '-ffast-math', '-fopenmp-simd']
+        opt_flags = ['-march=native', '-O3', '-ffast-math', '-fopenmp-simd']
         if configuration['debug']:
             opt_flags = ['-O0', '-g']
         cc = "mpicc"
@@ -419,7 +419,7 @@ class LinuxIntelCompiler(Compiler):
         rank 0 compiles code) (defaults to COMM_WORLD).
     """
     def __init__(self, cppargs=[], ldargs=[], cpp=False, comm=None):
-        opt_flags = ['-Ofast', '-xHost', '-qopenmp-simd']
+        opt_flags = ['-march=native', '-Ofast', '-xHost', '-qopenmp-simd']
         if configuration['debug']:
             opt_flags = ['-O0', '-g']
         cc = "mpicc"