MAINT: Move -m64 out to cpu_family()

interface/meson.build

@@ -83,7 +83,6 @@ _static_libs += static_library(
     'rot.c',
     include_directories:  _inc,
     c_args: [
-        '-m64',
         '-DSMP_SERVER',
         '-DNO_WARMUP',
         '-DMAX_CPU_NUMBER=12',

kernel/meson.build

@@ -786,7 +786,6 @@ _configs = [
    'undef': ['COMPLEX', 'COMPLEX'],
    'def': ['DOUBLE'],
    'addl': [fma3_flag,
-        '-m64',
         '-DSMP_SERVER',
         '-DNO_WARMUP',
         '-DMAX_CPU_NUMBER=12',

meson.build

@@ -153,6 +153,10 @@ if cpu_fam in ['x86_64', 'ppc64', 'ppc']
   ], language:'c')
 endif
 
+if cpu_fam == 'x86_64'
+  _cargs += ['-m64']
+endif
+
 if fc_id == 'gcc'
     add_project_arguments('-DF_INTERFACE_GFORT', language: 'c')
 elif fc_id == 'g95'