[PATCH] stdlib: merge some tests from gnulib

[Adhemerval Zanella Netto]

On 28/08/26 00:35, Collin Funk wrote:
> This makes the tests the same in both places. The changes in Gnulib
> brought in by this patch also silence -Woverflow when using gcc 16.1.1
> on i686.


LGTM, thanks.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

> ---
>  SHARED-FILES                   |  1 +
>  stdlib/tst-stdc_rotate_left.c  | 40 ++++++++++++++++++++++++++--------
>  stdlib/tst-stdc_rotate_right.c | 40 ++++++++++++++++++++++++++--------
>  3 files changed, 63 insertions(+), 18 deletions(-)
> 
> diff --git a/SHARED-FILES b/SHARED-FILES
> index b630b41209..f17a76dbf7 100644
> --- a/SHARED-FILES
> +++ b/SHARED-FILES
> @@ -113,6 +113,7 @@ gnulib:
>    stdlib/setenv.c
>    stdlib/strtoll.c
>    stdlib/strtoul.c
> +  # Merged from gnulib 2026-08-27, (gnulib commit ec224ee81b)
>    stdlib/tst-stdc_rotate_left.c
>    stdlib/tst-stdc_rotate_right.c
>    # Merged from gnulib 2014-6-26, needs merge back
> diff --git a/stdlib/tst-stdc_rotate_left.c b/stdlib/tst-stdc_rotate_left.c
> index e4b8052969..ec89f4ae52 100644
> --- a/stdlib/tst-stdc_rotate_left.c
> +++ b/stdlib/tst-stdc_rotate_left.c
> @@ -15,8 +15,27 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>  
> +#ifdef GNULIB_TEST_STDBIT
> +# include <config.h>
> +#endif
> +
> +/* Specification.  */
>  #include <stdbit.h>
> -#include <support/check.h>
> +
> +#include <limits.h>
> +
> +#ifdef GNULIB_TEST_STDBIT
> +# include "macros.h"
> +# define MAIN_STATIC
> +# define MAIN main
> +# define TEST_COMPARE(a, b) ASSERT ((a) == (b))
> +# define TEST_EXIT_STATUS test_exit_status
> +#else
> +# include <support/check.h>
> +# define MAIN_STATIC static
> +# define MAIN do_test
> +# define TEST_EXIT_STATUS 0
> +#endif
>  
>  #define TEST_CASE(type, function, value, shift, expect)         \
>    do                                                            \
> @@ -431,10 +450,11 @@ test_stdc_rotate_left_ui (void)
>  static void
>  test_stdc_rotate_left_ul (void)
>  {
> -  if (sizeof 0ul < sizeof 0ull)
> -    TEST_CASES_32 (unsigned long int, stdc_rotate_left_ul);
> -  else
> -    TEST_CASES_64 (unsigned long long int, stdc_rotate_left_ul);
> +#if ULONG_MAX >> 31 == 1
> +  TEST_CASES_32 (unsigned long int, stdc_rotate_left_ul);
> +#else
> +  TEST_CASES_64 (unsigned long int, stdc_rotate_left_ul);
> +#endif
>  }
>  
>  static void
> @@ -443,15 +463,17 @@ test_stdc_rotate_left_ull (void)
>    TEST_CASES_64 (unsigned long long int, stdc_rotate_left_ull);
>  }
>  
> -static int
> -do_test (void)
> +MAIN_STATIC int
> +MAIN (void)
>  {
>    test_stdc_rotate_left_uc ();
>    test_stdc_rotate_left_us ();
>    test_stdc_rotate_left_ui ();
>    test_stdc_rotate_left_ul ();
>    test_stdc_rotate_left_ull ();
> -  return 0;
> +  return TEST_EXIT_STATUS;
>  }
>  
> -#include <support/test-driver.c>
> +#ifndef GNULIB_TEST_STDBIT
> +# include <support/test-driver.c>
> +#endif
> diff --git a/stdlib/tst-stdc_rotate_right.c b/stdlib/tst-stdc_rotate_right.c
> index d9543b8b55..01b28cd957 100644
> --- a/stdlib/tst-stdc_rotate_right.c
> +++ b/stdlib/tst-stdc_rotate_right.c
> @@ -15,8 +15,27 @@
>     License along with the GNU C Library; if not, see
>     <https://www.gnu.org/licenses/>.  */
>  
> +#ifdef GNULIB_TEST_STDBIT
> +# include <config.h>
> +#endif
> +
> +/* Specification.  */
>  #include <stdbit.h>
> -#include <support/check.h>
> +
> +#include <limits.h>
> +
> +#ifdef GNULIB_TEST_STDBIT
> +# include "macros.h"
> +# define MAIN_STATIC
> +# define MAIN main
> +# define TEST_COMPARE(a, b) ASSERT ((a) == (b))
> +# define TEST_EXIT_STATUS test_exit_status
> +#else
> +# include <support/check.h>
> +# define MAIN_STATIC static
> +# define MAIN do_test
> +# define TEST_EXIT_STATUS 0
> +#endif
>  
>  #define TEST_CASE(type, function, value, shift, expect)         \
>    do                                                            \
> @@ -431,10 +450,11 @@ test_stdc_rotate_right_ui (void)
>  static void
>  test_stdc_rotate_right_ul (void)
>  {
> -  if (sizeof 0ul < sizeof 0ull)
> -    TEST_CASES_32 (unsigned long int, stdc_rotate_right_ul);
> -  else
> -    TEST_CASES_64 (unsigned long long int, stdc_rotate_right_ul);
> +#if ULONG_MAX >> 31 == 1
> +  TEST_CASES_32 (unsigned long int, stdc_rotate_right_ul);
> +#else
> +  TEST_CASES_64 (unsigned long int, stdc_rotate_right_ul);
> +#endif
>  }
>  
>  static void
> @@ -443,15 +463,17 @@ test_stdc_rotate_right_ull (void)
>    TEST_CASES_64 (unsigned long long int, stdc_rotate_right_ull);
>  }
>  
> -static int
> -do_test (void)
> +MAIN_STATIC int
> +MAIN (void)
>  {
>    test_stdc_rotate_right_uc ();
>    test_stdc_rotate_right_us ();
>    test_stdc_rotate_right_ui ();
>    test_stdc_rotate_right_ul ();
>    test_stdc_rotate_right_ull ();
> -  return 0;
> +  return TEST_EXIT_STATUS;
>  }
>  
> -#include <support/test-driver.c>
> +#ifndef GNULIB_TEST_STDBIT
> +# include <support/test-driver.c>
> +#endif