Allow usage of ARM architectures for Linux systems (not just Darwin).

pystencils/backends/simd_instruction_sets.py

@@ -43,7 +43,8 @@ def get_supported_instruction_sets():
         return _cache.copy()
     if 'PYSTENCILS_SIMD' in os.environ:
         return os.environ['PYSTENCILS_SIMD'].split(',')
-    if platform.system() == 'Darwin' and platform.machine() == 'arm64':  # not supported by cpuinfo
+    if (platform.system() == 'Darwin' or platform.system() == 'Linux') and platform.machine() == 'arm64':
+        # not supported by cpuinfo
         return ['neon']
     elif platform.system() == 'Linux' and platform.machine().startswith('riscv'):  # not supported by cpuinfo
         libc = CDLL('libc.so.6')

pystencils/cpu/cpujit.py

@@ -146,7 +146,9 @@ def read_config():
             ('flags', '-Ofast -DNDEBUG -fPIC -march=native -fopenmp -std=c++11'),
             ('restrict_qualifier', '__restrict__')
         ])
-        if platform.machine().startswith('ppc64'):
+        if platform.machine() == 'arm64':
+            default_compiler_config['flags'] = default_compiler_config['flags'].replace('-march=native', '')
+        elif platform.machine().startswith('ppc64'):
             default_compiler_config['flags'] = default_compiler_config['flags'].replace('-march=native',
                                                                                         '-mcpu=native')
     elif platform.system().lower() == 'windows':