[glibc/azanella/clang] elf: Suppress warning on clang

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=aab0cb093ab572e7c9b96de5f7d71364a58d7f85

commit aab0cb093ab572e7c9b96de5f7d71364a58d7f85
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu Mar 10 09:48:32 2022 -0300

    elf: Suppress warning on clang

Diff:
---
 elf/rtld.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/elf/rtld.c b/elf/rtld.c
index ebb3fbbb23..3d53107504 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -2506,10 +2506,16 @@ warning: debug option `%s' unknown; try LD_DEBUG=help\n", copy);
       _dl_printf ("\
 Valid options for the LD_DEBUG environment variable are:\n\n");
 
+      /* clang issues an warning adding 'const unsigned char' to a string
+	 does not append to the string, however it is exactly what code
+	 means here.  */
+      DIAG_PUSH_NEEDS_COMMENT_CLANG;
+      DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wstring-plus-int");
       for (cnt = 0; cnt < ndebopts; ++cnt)
 	_dl_printf ("  %.*s%s%s\n", debopts[cnt].len, debopts[cnt].name,
 		    "         " + debopts[cnt].len - 3,
 		    debopts[cnt].helptext);
+      DIAG_POP_NEEDS_COMMENT_CLANG;
 
       _dl_printf ("\n\
 To direct the debugging output into a file instead of standard output\n\