Some cleanups.

meson.py

@@ -181,7 +181,7 @@ if __name__ == '__main__':
     except Exception as e:
         if isinstance(e, MesonException):
             if hasattr(e, 'file') and hasattr(e, 'lineno') and hasattr(e, 'colno'):
-                mlog.log(mlog.red('\nMeson encountered an error in %s:%d,%d:' % (e.file, e.lineno, e.colno)))
+                mlog.log(mlog.red('\nMeson encountered an error in file %s, line %d, column %d:' % (e.file, e.lineno, e.colno)))
             else:
                 mlog.log(mlog.red('\nMeson encountered an error:'))
             mlog.log(e)

mparser.py

@@ -16,11 +16,11 @@
 
 import re
 import sys
+from coredata import MesonException
 
-class ParseException(Exception):
+class ParseException(MesonException):
     def __init__(self, text, lineno, colno):
-        super().__init__()
-        self.text = text
+        super().__init__(text)
         self.lineno = lineno
         self.colno = colno
 

ninjabackend.py

@@ -732,11 +732,12 @@ class NinjaBackend(backends.Backend):
             commands += linker.get_std_link_flags()
         else:
             raise RuntimeError('Unknown build target type.')
-        for dep in target.get_external_deps():
-            commands += dep.get_link_flags()
         dependencies = target.get_dependencies()
         commands += self.build_target_link_arguments(linker, dependencies)
         commands += target.link_flags
+        # External deps must be last because target link libraries may depend on them.
+        for dep in target.get_external_deps():
+            commands += dep.get_link_flags()
         commands += linker.build_rpath_args(self.environment.get_build_dir(), target.get_rpaths())
         if self.environment.coredata.coverage:
             commands += linker.get_coverage_link_flags()