Get alignment from cross file.

cross/ubuntu-armhf.txt

@@ -2,10 +2,15 @@ name = 'linux'
 c = '/usr/bin/arm-linux-gnueabihf-gcc'
 cpp = '/usr/bin/arm-linux-gnueabihf-g++'
 root = '/usr/arm-linux-gnueabihf'
-pkg-config = '/usr/bin/arm-linux-gnueabihf-pkg-config'
+pkg_config = '/usr/bin/arm-linux-gnueabihf-pkg-config'
 
 sizeof_int = 4
 sizeof_wchar_t = 4
+sizeof_void* = 4
+
+alignment_char = 1
+alignment_void* = 4
+alignment_double = 4 # Don't know if this is correct...
 
 has_function_printf = true
 has_function_hfkerhisadf = false

environment.py

@@ -227,7 +227,7 @@ Please define the corresponding variable {1} in your cross compilation definitio
             raise EnvironmentException('Could not run sizeof test binary.')
         return int(res.stdout)
 
-    def alignment(self, typename):
+    def alignment(self, typename, env):
         # A word of warning: this algoritm may be totally incorrect.
         # However it worked for me on the cases I tried.
         # There is probably a smarter and more robust way to get this
@@ -273,7 +273,23 @@ int main(int argc, char **argv) {
   return 0;
 }
 '''
-        res = self.run(templ % typename)
+        varname = 'alignment ' + typename
+        varname = varname.replace(' ', '_')
+        if self.is_cross:
+            val = env.cross_info.get(varname)
+            if val is not None:
+                if isinstance(val, int):
+                    return val
+                raise EnvironmentException('Cross variable {0} is not an integer.'.format(varname))
+        cross_failed = False
+        try:
+            res = self.run(templ % typename)
+        except CrossNoRunException:
+            cross_failed = True
+        if cross_failed:
+            message = '''Can not determine alignment of {0} because cross compiled binaries are not runnable.
+Please define the corresponding variable {1} in your cross compilation definition file.'''.format(typename, varname)
+            raise EnvironmentException(message)
         if not res.compiled:
             raise EnvironmentException('Could not compile alignment test.')
         if res.returncode != 0:

interpreter.py

@@ -674,7 +674,7 @@ class CompilerHolder(InterpreterObject):
         typename = args[0]
         if not isinstance(typename, str):
             raise InterpreterException('First argument is not a string.')
-        result = self.compiler.alignment(typename)
+        result = self.compiler.alignment(typename, self.environment)
         mlog.log('Checking for alignment of "', mlog.bold(typename), '": ', result, sep='')
         return result