tools/configurator: fix compile error with -O2

In file included from /usr/include/string.h:495,
                 from configuratortest.c:2:
In function ‘strncpy’,
    inlined from ‘main’ at configuratortest.c:6:2:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ specified bound 8 equals destination size [-Wstringop-truncation]
  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/tools/configurator/configurator.c b/tools/configurator/configurator.c
index c8b131cc708f214d61b269b18ab8b081fe51e685..33651ef4df3bc95c27ad12a25327439a40ce4213 100644 (file)
--- a/tools/configurator/configurator.c
+++ b/tools/configurator/configurator.c
@@ -411,7 +411,7 @@ static const struct test base_tests[] = {
          "int main(int argc, char *argv[]) {\n"
          "     (void)argc;\n"
          "     char pad[sizeof(int *) * 1];\n"
          "int main(int argc, char *argv[]) {\n"
          "     (void)argc;\n"
          "     char pad[sizeof(int *) * 1];\n"

-         "     strncpy(pad, argv[0], sizeof(pad));\n"
+         "     memcpy(pad, argv[0], sizeof(pad));\n"

          "     int *x = (int *)pad, *y = (int *)(pad + 1);\n"
          "     return *x == *y;\n"
          "}\n" },
          "     int *x = (int *)pad, *y = (int *)(pad + 1);\n"
          "     return *x == *y;\n"
          "}\n" },