File _service:tar_scm:backport-clang-0016-elf-Supres... of Package glibc

File _service:tar_scm:backport-clang-0016-elf-Supress-clang-Wsometimes-uninitialized-on.patch of Package glibc (Revision 756e0ca71b8eecd09f8ca555e0cce4dd)

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From 6248c3674e9acbc33afed2a65d4916cbb9873a77 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Wed, 24 Aug 2022 12:25:05 -0300
Subject: [PATCH] elf: Supress clang -Wsometimes-uninitialized on
 _dl_debug_initialize

clang issues an warning where variable 'r' is used uninitialized
whenever 'if' condition is false.  The _dl_debug_initialize is called
for static case always with LM_ID_BASE (csu/libc-start.c and
elf/dl-reloc-static-pie.c) and DL_NSS will be always larger than 1
for shared case.
---
 elf/dl-debug.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/elf/dl-debug.c b/elf/dl-debug.c
index bd7b1cc8f7..3c4476c22c 100644
--- a/elf/dl-debug.c
+++ b/elf/dl-debug.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <ldsodefs.h>
+#include <libc-diag.h>
 
 
 /* These are the members in the public `struct link_map' type.
@@ -54,7 +55,15 @@ _dl_debug_update (Lmid_t ns)
 struct r_debug *
 _dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns)
 {
-  struct r_debug_extended *r, **pp = NULL;
+  /* clang issues an warning where variable 'r' is used uninitialized whenever
+     'if' condition is false.  The _dl_debug_initialize is called for static
+     case always with LM_ID_BASE (csu/libc-start.c and
+     elf/dl-reloc-static-pie.c) and DL_NSS will be always larger than 1 for
+     shared case.  */
+  DIAG_PUSH_NEEDS_COMMENT_CLANG;
+  DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wsometimes-uninitialized");
+  struct r_debug_extended *r;
+  struct r_debug_extended **pp = NULL;
 
   if (ns == LM_ID_BASE)
     {
@@ -81,6 +90,7 @@ _dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns)
 	  r->base.r_version = 2;
 	}
     }
+  DIAG_POP_NEEDS_COMMENT_CLANG;
 
   if (r->base.r_brk == 0)
     {
-- 
2.39.3