File _service:tar_scm:backport-clang-0007-Add-clang-... of Package glibc

File _service:tar_scm:backport-clang-0007-Add-clang-specific-warnings-suppress-macros.patch of Package glibc (Revision 756e0ca71b8eecd09f8ca555e0cce4dd)

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From 9175344b69f63546b020cc150cf1805a3ecbf5e9 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue, 12 Sep 2023 15:45:24 -0300
Subject: [PATCH] Add clang specific warnings suppress macros

Four new macros are added:

* DIAG_{PUSH,POP}_NEEDS_COMMENT_CLANG are similar to
    DIAG_{PUSH,POP}_NEEDS_COMMENT, but enable clang specific pragmas to
    handle warnings for options only supported by clang.

* DIAG_IGNORE_NEEDS_COMMENT_{CLANG,GCC} are similar to
    DIAG_IGNORE_NEEDS_COMMENT, but enable the warning suppression only
    for the referenced compiler.
---
 include/libc-diag.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/include/libc-diag.h b/include/libc-diag.h
index dada76a51d..a82e9775dd 100644
--- a/include/libc-diag.h
+++ b/include/libc-diag.h
@@ -38,6 +38,16 @@
 /* Pop diagnostic state.  */
 #define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop")
 
+/* These macros are used to push/pop diagnostic states for warnings only
+   supported by clang.  */
+#ifdef __clang__
+# define DIAG_PUSH_NEEDS_COMMENT_CLANG _Pragma ("clang diagnostic push")
+# define DIAG_POP_NEEDS_COMMENT_CLANG _Pragma ("clang diagnostic pop")
+#else
+# define DIAG_PUSH_NEEDS_COMMENT_CLANG
+# define DIAG_POP_NEEDS_COMMENT_CLANG
+#endif
+
 #define _DIAG_STR1(s) #s
 #define _DIAG_STR(s) _DIAG_STR1(s)
 
@@ -71,4 +81,16 @@
 # define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option)
 #endif
 
+/* Similar to DIAG_IGNORE_NEEDS_COMMENT, these macros should be used
+   to suppress warning supported by the specific compiler.  */
+#ifndef __clang__
+# define DIAG_IGNORE_NEEDS_COMMENT_GCC(VERSION, WARNING) \
+  DIAG_IGNORE_NEEDS_COMMENT (VERSION, WARNING)
+# define DIAG_IGNORE_NEEDS_COMMENT_CLANG(version, option)
+#else
+# define DIAG_IGNORE_NEEDS_COMMENT_GCC(VERSION, WARNING)
+# define DIAG_IGNORE_NEEDS_COMMENT_CLANG(version, option) \
+  _Pragma (_DIAG_STR (clang diagnostic ignored option))
+#endif
+
 #endif /* libc-diag.h */
-- 
2.39.3