With newer flex releases grub fails to build:
grub_script.yy.c: In function 'yy_fatal_error':
grub_script.yy.c:18:22: error: statement with no effect [-Werror=unused-value]
^
grub_script.yy.c:2366:2: note: in expansion of macro 'fprintf'
(void)yyg;
^~~~~~~
Backport a patch from upstream to fix this.
Signed-off-by: Ross Burton <ross.bur...@intel.com>
---
meta/recipes-bsp/grub/files/cast-fprintf.patch | 36 ++++++++++++++++++++++++++
meta/recipes-bsp/grub/grub2.inc | 4 +--
2 files changed, 38 insertions(+), 2 deletions(-)
create mode 100644 meta/recipes-bsp/grub/files/cast-fprintf.patch
diff --git a/meta/recipes-bsp/grub/files/cast-fprintf.patch
b/meta/recipes-bsp/grub/files/cast-fprintf.patch
new file mode 100644
index 00000000000..b340d557070
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/cast-fprintf.patch
@@ -0,0 +1,36 @@
+grub_script.yy.c: In function 'yy_fatal_error':
+grub_script.yy.c:18:22: error: statement with no effect [-Werror=unused-value]
+
+ ^
+grub_script.yy.c:2366:2: note: in expansion of macro 'fprintf'
+ (void)yyg;
+ ^~~~~~~
+
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.bur...@intel.com>
+
+From c36c2a86404f373100775305f532c09d46f3c6ce Mon Sep 17 00:00:00 2001
+From: Vladimir Serbinenko <phco...@gmail.com>
+Date: Mon, 14 Aug 2017 14:11:43 +0200
+Subject: yylex: Explicilty cast fprintf to void.
+
+It's needed to avoid warning on recent GCC.
+---
+ grub-core/script/yylex.l | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/grub-core/script/yylex.l b/grub-core/script/yylex.l
+index 95b2191..7b44c37 100644
+--- a/grub-core/script/yylex.l
++++ b/grub-core/script/yylex.l
+@@ -91,7 +91,7 @@ typedef size_t yy_size_t;
+ #define stdin 0
+ #define stdout 0
+
+-#define fprintf(...) 0
++#define fprintf(...) (void)0
+ #define exit(...) grub_fatal("fatal error in lexer")
+ #endif
+
+--
+cgit v1.0-41-gc330
diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 2ea31f64206..fc175406885 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -17,8 +17,8 @@ SRC_URI = "https://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \
file://autogen.sh-exclude-pc.patch \
file://grub-module-explicitly-keeps-symbole-.module_license.patch \
file://0001-grub.d-10_linux.in-add-oe-s-kernel-name.patch \
- file://fix.build.with.gcc-7.patch \
-"
+ file://fix.build.with.gcc-7.patch \
+ file://cast-fprintf.patch"
SRC_URI[md5sum] = "1116d1f60c840e6dbd67abbc99acb45d"
SRC_URI[sha256sum] =
"660ee136fbcee08858516ed4de2ad87068bfe1b6b8b37896ce3529ff054a726d"
--
2.11.0
--
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