[glibc/azanella/clang] math: Fix clang warnings for math/test-tgmath-ret.c

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=81c8730377da70bff05715c7479b85eb1d9714b9

commit 81c8730377da70bff05715c7479b85eb1d9714b9
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Mar 15 15:33:02 2022 -0300

    math: Fix clang warnings for math/test-tgmath-ret.c
    
    clang warns that since the global variables are only used to function
    calls (without being actually used), there are not needed and will
    not be emitted.

Diff:
---
 math/test-tgmath-ret.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/math/test-tgmath-ret.c b/math/test-tgmath-ret.c
index 8c1cce37bd..acfb6e66e8 100644
--- a/math/test-tgmath-ret.c
+++ b/math/test-tgmath-ret.c
@@ -21,13 +21,20 @@
 #include <tgmath.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <libc-diag.h>
 
+/* clang warns that since the global variables are only used to function
+   calls (without being actually used), there are not needed and will not
+   be emitted.  */
+DIAG_PUSH_NEEDS_COMMENT_CLANG;
+DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunneeded-internal-declaration");
 static float fx;
 static double dx;
 static long double lx;
 static int rm = FP_INT_UPWARD;
 static unsigned int width = 64;
 static int errors = 0;
+DIAG_POP_NEEDS_COMMENT_CLANG;
 
 static void
 our_error (const char *c)