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gold: Suppress "unused" variable warning on Clang

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Clang generates a warning if there is a variable that is set but not used
otherwise ("-Wunused-but-set-variable").  On the default configuration, it
causes a build failure (unless "--disable-werror" is specified).

Because the cause of this error is in the Bison-generated code
($(srcdir)/gold/yyscript.y -> $(builddir)/gold/yyscript.c),
this commit suppresses this warning ("-Wunused-but-set-variable") by placing
DIAGNOSTIC_IGNORE_UNUSED_BUT_SET_VARIABLE macro at the end of user
prologue on yyscript.y.

	* yyscript.y: Suppress -Wunused-but-set-variable warning on
	the Bison-generated code.
This commit is contained in:
Tsukasa OI
2022-09-26 10:35:40 +00:00
committed by Alan Modra
parent 8818c80cbd
commit f7aa1a5acc
1 changed files with 3 additions and 0 deletions
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3
gold/yyscript.y
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@@ -26,6 +26,7 @@
%{ %{
#include "config.h" #include "config.h"
#include "diagnostics.h"
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
@@ -34,6 +35,8 @@
#include "script-c.h" #include "script-c.h"
DIAGNOSTIC_IGNORE_UNUSED_BUT_SET_VARIABLE
%} %}
/* We need to use a pure parser because we might be multi-threaded. /* We need to use a pure parser because we might be multi-threaded.