perf: parse-events: Fix compilation error while defining DEBUG_PARSER

Compiling perf tool with 'DEBUG_PARSER=1' leads to errors:

$> make -C tools/perf PARSER_DEBUG=1 NO_LIBTRACEEVENT=1
...
  CC      util/expr-flex.o
  CC      util/expr.o
util/parse-events.c:33:12: error: redundant redeclaration of ‘parse_events_debug’ [-Werror=redundant-decls]
   33 | extern int parse_events_debug;
      |            ^~~~~~~~~~~~~~~~~~
In file included from util/parse-events.c:18:
util/parse-events-bison.h:43:12: note: previous declaration of ‘parse_events_debug’ with type ‘int’
   43 | extern int parse_events_debug;
      |            ^~~~~~~~~~~~~~~~~~
util/expr.c:27:12: error: redundant redeclaration of ‘expr_debug’ [-Werror=redundant-decls]
   27 | extern int expr_debug;
      |            ^~~~~~~~~~
In file included from util/expr.c:11:
util/expr-bison.h:43:12: note: previous declaration of ‘expr_debug’ with type ‘int’
   43 | extern int expr_debug;
      |            ^~~~~~~~~~
cc-1: all warnings being treated as errors

Remove extern declaration from the parse-envents.c file as there is a
conflict with the ones generated using bison and yacc tools from the file
parse-events.[ly].

Signed-off-by: Clément Le Goffic <[email protected]>
Reviewed-by: Ian Rogers <[email protected]>
Cc: James Clark <[email protected]>
Cc: John Garry <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

2 files changed, 0 insertions, 7 deletions

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index b8875aac8f87..b2536a59c44e 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -25,10 +25,6 @@
 #include <math.h>
 #include "pmu.h"
 
-#ifdef PARSER_DEBUG
-extern int expr_debug;
-#endif
-
 struct expr_id_data {
 	union {
 		struct {
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 6ed0f9c5581d..8d5fb05f20c2 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -31,9 +31,6 @@
 
 #define MAX_NAME_LEN 100
 
-#ifdef PARSER_DEBUG
-extern int parse_events_debug;
-#endif
 static int get_config_terms(const struct parse_events_terms *head_config,
 			    struct list_head *head_terms);
 static int parse_events_terms__copy(const struct parse_events_terms *src,