Fixed compiler warnings from gcc 7.4.1

- Fixed possible error in rocksdb/rdb_datadic.cc

2 files changed, 9 insertions, 5 deletions

diff --git a/plugin/auth_pam/auth_pam_tool.c b/plugin/auth_pam/auth_pam_tool.c
index 624b6880933..225f35a6624 100644
--- a/plugin/auth_pam/auth_pam_tool.c
+++ b/plugin/auth_pam/auth_pam_tool.c
@@ -16,6 +16,7 @@
 
 #include <stdlib.h>
 #include <unistd.h>
+#include <errno.h>
 #include <mysql/plugin_auth_common.h>
 
 struct param {
@@ -62,7 +63,7 @@ typedef struct st_mysql_server_auth_info
 #include "auth_pam_base.c"
 
 
-int main(int argc, char **argv)
+int main(int argc __attribute__((unused)), char **argv __attribute__((unused)))
 {
   struct param param;
   MYSQL_SERVER_AUTH_INFO info;
@@ -70,7 +71,8 @@ int main(int argc, char **argv)
   int res;
   char a_buf[MYSQL_USERNAME_LENGTH + 1 + 1024];
 
-  (void) setreuid(0, 0);
+  if ((res= setreuid(0, 0)))
+    fprintf(stderr, "Got error %d from setreuid()\n", (int) errno);
 
   if (read(0, &field, 1) < 1)
     return -1;
diff --git a/plugin/auth_pam/testing/pam_mariadb_mtr.c b/plugin/auth_pam/testing/pam_mariadb_mtr.c
index c0e07232027..2075d5fdbf3 100644
--- a/plugin/auth_pam/testing/pam_mariadb_mtr.c
+++ b/plugin/auth_pam/testing/pam_mariadb_mtr.c
@@ -15,7 +15,7 @@
 
 #define N 3
 
-int pam_sm_authenticate(pam_handle_t *pamh, int flags,
+int pam_sm_authenticate(pam_handle_t *pamh, int flags __attribute__((unused)),
                         int argc, const char *argv[])
 {
   struct pam_conv *conv;
@@ -72,8 +72,10 @@ ret:
   return retval;
 }
 
-int pam_sm_setcred(pam_handle_t *pamh, int flags,
-                   int argc, const char *argv[])
+int pam_sm_setcred(pam_handle_t *pamh __attribute__((unused)),
+                   int flags __attribute__((unused)),
+                   int argc __attribute__((unused)),
+                   const char *argv[] __attribute__((unused)))
 {
 
     return PAM_SUCCESS;