perf bpf-filter: Add YYDEBUG

YYDEBUG enables line numbers and other error helpers in the generated
bpf-filter-bison.c. Conditionally enabled only for debug builds.

Signed-off-by: Ian Rogers <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Gaosheng Cui <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: captain5050

tools/perf/util/bpf-filter.y

@@ -3,6 +3,10 @@
 
 %{
 
+#ifndef NDEBUG
+#define YYDEBUG 1
+#endif
+
 #include <stdio.h>
 #include <string.h>
 #include <linux/compiler.h>