uboot-at91: fix dtc compilation on host gcc 10

Backport a patch from upstream U-Boot to fix the compile with host GCC 10.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit a1034afba8ea8bec48e2528fdae0fb74a6757e53)

2 files changed, 49 insertions, 9 deletions

diff --git a/package/boot/uboot-at91/patches/001-fix-Wformat-security.patch b/package/boot/uboot-at91/patches/001-fix-Wformat-security.patch
index 23cb5828b3..4c968a2448 100644
--- a/package/boot/uboot-at91/patches/001-fix-Wformat-security.patch
+++ b/package/boot/uboot-at91/patches/001-fix-Wformat-security.patch
@@ -1,8 +1,6 @@
-diff --git a/cmd/version.c b/cmd/version.c
-index b2fffe99..bcbbeb18 100644
 --- a/cmd/version.c
 +++ b/cmd/version.c
-@@ -18,7 +18,7 @@ static int do_version(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+@@ -18,7 +18,7 @@ static int do_version(cmd_tbl_t *cmdtp,
  {
  	char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
  
@@ -11,11 +9,9 @@ index b2fffe99..bcbbeb18 100644
  #ifdef CC_VERSION_STRING
  	puts(CC_VERSION_STRING "\n");
  #endif
-diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
-index 3425ed11..8c2e1d5c 100644
 --- a/drivers/pinctrl/pinctrl-uclass.c
 +++ b/drivers/pinctrl/pinctrl-uclass.c
-@@ -368,7 +368,7 @@ int pinctrl_get_pin_name(struct udevice *dev, int selector, char *buf,
+@@ -368,7 +368,7 @@ int pinctrl_get_pin_name(struct udevice
  	if (!ops->get_pin_name)
  		return -ENOSYS;
  
@@ -24,11 +20,9 @@ index 3425ed11..8c2e1d5c 100644
  
  	return 0;
  }
-diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
-index c316bdfe..5fe8129c 100644
 --- a/lib/efi_loader/efi_variable.c
 +++ b/lib/efi_loader/efi_variable.c
-@@ -522,7 +522,7 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
+@@ -522,7 +522,7 @@ efi_status_t EFIAPI efi_set_variable(u16
  
  	if (old_size)
  		/* APPEND_WRITE */
diff --git a/package/boot/uboot-at91/patches/010-fix_dtc_compilation_on_host_gcc10.patch b/package/boot/uboot-at91/patches/010-fix_dtc_compilation_on_host_gcc10.patch
new file mode 100644
index 0000000000..6abb151608
--- /dev/null
+++ b/package/boot/uboot-at91/patches/010-fix_dtc_compilation_on_host_gcc10.patch
@@ -0,0 +1,46 @@
+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(-)
+
+--- 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() */