[Qemu-devel] [PATCH] trace: fix generated code build break

[Greg Kurz]

If the QEMU source dir is

    /var/tmp/aaa-qemu-clone

and the build dir is

    /var/tmp/qemu-aio-poll-v2

Then I get an error as:

trace/generated-tracers.c:15950:13: error: invalid suffix "_trace_events"
 on integer constant
 TraceEvent *2_trace_events[] = {
             ^
trace/generated-tracers.c:15950:13: error: expected identifier or ‘(’ before
 numeric constant
trace/generated-tracers.c: In function ‘trace_2_register_events’:
trace/generated-tracers.c:17949:32: error: invalid suffix "_trace_events" on
 integer constant
     trace_event_register_group(2_trace_events);
                                ^
make: *** [trace/generated-tracers.o] Error 1

This patch fixes the issue.

Reported-by: Fam Zheng <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
---
 scripts/tracetool.py |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/tracetool.py b/scripts/tracetool.py
index fe9c9e904b03..c9e47371d3c6 100755
--- a/scripts/tracetool.py
+++ b/scripts/tracetool.py
@@ -70,7 +70,7 @@ def make_group_name(filename):
 
     if dirname == "":
         return "common"
-    return re.sub(r"[^A-Za-z0-9]", "_", dirname)
+    return "_" + re.sub(r"[^A-Za-z0-9]", "_", dirname)
 
 def main(args):
     global _SCRIPT