[glibc/azanella/clang] string: Suppress clang confstr -Wignored-attributes on strlen

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=54f65559b0353701da52c12bfaf69a037175fb81

commit 54f65559b0353701da52c12bfaf69a037175fb81
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu Sep 28 14:18:54 2023 -0300

    string: Suppress clang confstr -Wignored-attributes on strlen
    
    clang warns that the alias will be always resolve to __strlen
    even if weak definition of __GI_strlen is overridden, which is
    really the intention.

Diff:
---
 string/strlen.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/string/strlen.c b/string/strlen.c
index 5a4424f9a5..b648ee2aa3 100644
--- a/string/strlen.c
+++ b/string/strlen.c
@@ -48,5 +48,10 @@ __strlen (const char *str)
 }
 #ifndef STRLEN
 weak_alias (__strlen, strlen)
+/* clang warns that the alias will be always resolve to __strlen even if weak
+   definition of __GI_strlen is overridden, which is really the intention.  */
+DIAG_PUSH_NEEDS_COMMENT_CLANG;
+DIAG_IGNORE_NEEDS_COMMENT_CLANG (16, "-Wignored-attributes");
 libc_hidden_builtin_def (strlen)
+DIAG_POP_NEEDS_COMMENT_CLANG;
 #endif