uboot-zynq: fix dtc compilation on host gcc 10

gcc 10 defaults to -fno-common, which causes an error
when linking.

Back-port the following Linux kernel commit to fix it:
e33a814e772c (scripts/dtc: Remove redundant YYLOC global declaration)

Tested on an Arch Linux host with gcc 10.1.0

Signed-off-by: Luis Araneda <luaraneda@gmail.com>
This commit is contained in:
Luis Araneda 2020-08-02 19:34:42 -04:00 committed by Christian Lamparter
parent b2d48c1dfe
commit 8b870418f1

View File

@ -0,0 +1,48 @@
From e33a814e772cdc36436c8c188d8c42d019fda639 Mon Sep 17 00:00:00 2001
From: Dirk Mueller <dmueller@suse.com>
Date: Tue, 14 Jan 2020 18:53:41 +0100
Subject: [PATCH] scripts/dtc: Remove redundant YYLOC global declaration
gcc 10 will default to -fno-common, which causes this error at link
time:
(.text+0x0): multiple definition of `yylloc'; dtc-lexer.lex.o (symbol from plugin):(.text+0x0): first defined here
This is because both dtc-lexer as well as dtc-parser define the same
global symbol yyloc. Before with -fcommon those were merged into one
defintion. The proper solution would be to to mark this as "extern",
however that leads to:
dtc-lexer.l:26:16: error: redundant redeclaration of 'yylloc' [-Werror=redundant-decls]
26 | extern YYLTYPE yylloc;
| ^~~~~~
In file included from dtc-lexer.l:24:
dtc-parser.tab.h:127:16: note: previous declaration of 'yylloc' was here
127 | extern YYLTYPE yylloc;
| ^~~~~~
cc1: all warnings being treated as errors
which means the declaration is completely redundant and can just be
dropped.
Signed-off-by: Dirk Mueller <dmueller@suse.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[robh: cherry-pick from upstream]
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
scripts/dtc/dtc-lexer.l | 1 -
1 file changed, 1 deletion(-)
diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
index 5c6c3fd557d7f..b3b7270300de5 100644
--- a/scripts/dtc/dtc-lexer.l
+++ b/scripts/dtc/dtc-lexer.l
@@ -38,7 +38,6 @@ LINECOMMENT "//".*\n
#include "srcpos.h"
#include "dtc-parser.tab.h"
-YYLTYPE yylloc;
extern bool treesource_error;
/* CAUTION: this will stop working if we ever use yyless() or yyunput() */