[newlib-cygwin/main] newlocale: set errno to ENOENT if __loadlocale fails

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=606373e7d2e7009209ca536ab1c9c3393af61275

commit 606373e7d2e7009209ca536ab1c9c3393af61275
Author:     Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Fri Mar 24 10:51:31 2023 +0100
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Fri Mar 24 12:44:52 2023 +0100

    newlocale: set errno to ENOENT if __loadlocale fails
    
    __loadlocale never sets errno, but newlocale is supposed to
    return ENOENT if the locale isn't valid.
    
    Fixes: aefd8b5b518b ("Implement newlocale, freelocale, duplocale, uselocale")
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 newlib/libc/locale/newlocale.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/newlib/libc/locale/newlocale.c b/newlib/libc/locale/newlocale.c
index 08f29dbcc0c1..278f78ed2462 100644
--- a/newlib/libc/locale/newlocale.c
+++ b/newlib/libc/locale/newlocale.c
@@ -171,7 +171,10 @@ _newlocale_r (struct _reent *p, int category_mask, const char *locale,
 	    continue;
 	  /* Otherwise load locale data. */
 	  else if (!__loadlocale (&tmp_locale, i, new_categories[i]))
-	    goto error;
+	    {
+	      p->_errno = ENOENT;
+	      goto error;
+	    }
 	}
     }
   /* Allocate new locale_t. */