tools/osdmaptool: mark unused variable [[maybe_unused]]

to silence warning from GCC when performing release build, like:

../src/tools/osdmaptool.cc: In function ‘int main(int, const char**)’:
../src/tools/osdmaptool.cc:472:9: warning: variable ‘r’ set but not used [-Wunused-but-set-variable]
  472 |     int r = clock_gettime(CLOCK_MONOTONIC, &round_start);
      |         ^

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/tools/osdmaptool.cc b/src/tools/osdmaptool.cc
index 9bbe40f4d169fbd297134df6d56813cdf6d79216..b876d6148ce790b7be53f1490f9625e078d2c16f 100644 (file)
--- a/src/tools/osdmaptool.cc
+++ b/src/tools/osdmaptool.cc
@@ -469,7 +469,7 @@ int main(int argc, const char **argv)
     }
     int rounds = 0;
     struct timespec round_start;
-    int r = clock_gettime(CLOCK_MONOTONIC, &round_start);
+    [[maybe_unused]] int r = clock_gettime(CLOCK_MONOTONIC, &round_start);
     assert(r == 0);
     do {
       random_device_t rd;