On Windows, getpid() always returns an int value, but pid_t (which is
expected by the format string) is either a 32 bit or a 64 bit value.
Without a type cast (or a modified format string), the compiler prints
a warning when building for 64 bit Windows and the resulting trace_file_name
will include a wrong pid:
trace/simple.c:332:9: warning:
format ‘%lld’ expects argument of type ‘long long int’,
but argument 2 has type ‘int’ [-Wformat=]
Signed-off-by: Stefan Weil <s...@weilnetz.de>
---
trace/simple.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/trace/simple.c b/trace/simple.c
index 11ad030..56a624c 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -329,7 +329,8 @@ bool st_set_trace_file(const char *file)
g_free(trace_file_name);
if (!file) {
- trace_file_name = g_strdup_printf(CONFIG_TRACE_FILE, getpid());
+ /* Type cast needed for Windows where getpid() returns an int. */
+ trace_file_name = g_strdup_printf(CONFIG_TRACE_FILE, (pid_t)getpid());
} else {
trace_file_name = g_strdup_printf("%s", file);
}
--
2.1.4
