[glibc/azanella/clang] Add clang specific warnings suppress macros
Adhemerval Zanella
azanella@sourceware.org
Tue Apr 2 15:50:38 GMT 2024
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3911c52da84faa4a859669691d015a011133ebe9
commit 3911c52da84faa4a859669691d015a011133ebe9
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue Sep 12 15:45:24 2023 -0300
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.
Diff:
---
include/libc-diag.h | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/include/libc-diag.h b/include/libc-diag.h
index 4b1c916756..7666a386f3 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 */
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