[glibc/azanella/clang] riscv: Suppress clang confstr -Wignored-attributes feupdateenv

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=85ab29334488e003203674b0eb9482266e8a96a8

commit 85ab29334488e003203674b0eb9482266e8a96a8
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu Sep 28 14:19:51 2023 -0300

    riscv: Suppress clang confstr -Wignored-attributes feupdateenv
    
    clang warns that the alias will be always resolve to
    __GI___feupdateenv even if weak definition of __GI_feupdateenv
    is overridden, which is really the intention.

Diff:
---
 sysdeps/riscv/rvf/feupdateenv.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sysdeps/riscv/rvf/feupdateenv.c b/sysdeps/riscv/rvf/feupdateenv.c
index 08842a64b2..bd5adb236e 100644
--- a/sysdeps/riscv/rvf/feupdateenv.c
+++ b/sysdeps/riscv/rvf/feupdateenv.c
@@ -27,4 +27,10 @@ __feupdateenv (const fenv_t *envp)
 }
 libm_hidden_def (__feupdateenv)
 weak_alias (__feupdateenv, feupdateenv)
+/* clang warns that the alias will be always resolve to __GI___feupdateenv
+   even if weak definition of __GI_feupdateenv is overridden, which is really
+   the intention.  */
+DIAG_PUSH_NEEDS_COMMENT_CLANG;
+DIAG_IGNORE_NEEDS_COMMENT_CLANG (16, "-Wignored-attributes");
 libm_hidden_weak (feupdateenv)
+DIAG_POP_NEEDS_COMMENT_CLANG;