Fixing Cortex-A and SARA_NBIOT_EVK build failures (#3)

* Adding Cortex-A support for gnuarmeclipse
* Preventing '-mthumb' from being added to Cortex-A builds.
Previously, both '-mthumb' and '-marm' were being supplied to the
compiler (in that order). Because '-marm' came last, the compiler
respected this option. This change makes it so '-mthumb' is added for
all 'Cortex-M' targets only.
* Renaming to capital .S for Eclipse compatibility

tools/export/gnuarmeclipse/__init__.py

@@ -607,6 +607,7 @@ def process_options(self, opts, flags_in):
             'Cortex-M7': {'mcpu': 'cortex-m7', 'fpu_unit': None},
             'Cortex-M7F': {'mcpu': 'cortex-m7', 'fpu_unit': 'fpv4spd16'},
             'Cortex-M7FD': {'mcpu': 'cortex-m7', 'fpu_unit': 'fpv5d16'},
+            'Cortex-A9': {'mcpu': 'cortex-a9', 'fpu_unit': 'vfpv3'}
         }
 
         # Remove options that are supplied by CDT
@@ -635,9 +636,9 @@ def process_options(self, opts, flags_in):
         opts['common']['arm.target.arch'] = 'none'
         str = self.find_options(flags['common_flags'], '-march=')
         arch = str[len('-march='):]
-        archs = {'armv6-m': 'armv6-m', 'armv7-m': 'armv7-m'}
+        archs = {'armv6-m': 'armv6-m', 'armv7-m': 'armv7-m', 'armv7-a': 'armv7-a'}
         if arch in archs:
-            opts['common']['arm.target.arch'] = archs[arh]
+            opts['common']['arm.target.arch'] = archs[arch]
             self.remove_option(flags['common_flags'], str)
 
         opts['common']['arm.target.instructionset'] = 'thumb'

tools/toolchains/gcc.py

@@ -58,7 +58,7 @@ def __init__(self, target,  notify=None, macros=None,
             cpu = target.core.lower()
 
         self.cpu = ["-mcpu=%s" % cpu]
-        if target.core.startswith("Cortex"):
+        if target.core.startswith("Cortex-M"):
             self.cpu.append("-mthumb")
 
         # FPU handling, M7 possibly to have double FPU