add -std=gnu99 to compiling

Perf uses -std=gnu99 which causes some strange side effects.
To keep parse-events.c close to what is in perf, we use the same
option. Namely, it makes us typecast the options for "%a" in the
sscanf to float.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

2 files changed, 6 insertions, 5 deletions

diff --git a/Makefile b/Makefile
index 538406c..a8dbce1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,10 @@
 CC = gcc
+EXT = -std=gnu99
 CFLAGS = -g -Wall # -O2
 INCLUDES = -I. -I/usr/local/include
 
 %.o: %.c
-        $(CC) -c $(CFLAGS) $(INCLUDES) $< -o $@
+        $(CC) -c $(CFLAGS) $(EXT) $(INCLUDES) $< -o $@
 
 TARGETS = trace-cmd
 
diff --git a/parse-events.c b/parse-events.c
index 1da9433..a9a06b9 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -95,7 +95,7 @@ void parse_cmdlines(char *file, int size __unused)
         while (line) {
                 item = malloc_or_die(sizeof(*item));
                 sscanf(line, "%d %as", &item->pid,
-                       &item->comm); /* workaround gcc warning */
+                       (float *)(void *)&item->comm); /* workaround gcc warning */
                 item->next = list;
                 list = item;
                 line = strtok_r(NULL, "\n", &next);
@@ -175,10 +175,10 @@ void parse_proc_kallsyms(char *file, unsigned int size __unused)
                 item = malloc_or_die(sizeof(*item));
                 item->mod = NULL;
                 ret = sscanf(line, "%as %c %as\t[%as",
-                             &addr_str,
+                             (float *)(void *)&addr_str, /* workaround gcc warning */
                              &ch,
-                             &item->func,
-                             &item->mod);
+                             (float *)(void *)&item->func,
+                             (float *)(void *)&item->mod);
                 item->addr = strtoull(addr_str, NULL, 16);
                 free(addr_str);