From: Markus Armbruster <armbru@redhat.com>

guardname() fails to return a valid C identifier for arguments
containing anything but [A-Za-z0-9_.-'].  Fix that.  Don't bother
protecting ticklish identifiers; header guards are all-caps, and no
ticklish identifiers are.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180211093607.27351-22-armbru@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 scripts/qapi/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py
index 547656c8b29..069ec3715d7 100644
--- a/scripts/qapi/common.py
+++ b/scripts/qapi/common.py
@@ -1867,7 +1867,7 @@ def mcgen(code, **kwds):


 def guardname(filename):
-    return c_name(filename, protect=False).upper()
+    return re.sub(r'[^A-Za-z0-9_]', '_', filename).upper()


 def guardstart(name):
-- 
2.14.3