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package/xen: fix build failure on x86 after bump to 4.7

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Since the bump to 4.7, Xen fails to build because of a double definition
of __OBJECT_FILE__. This is due to (who would have guessed) the weirdness
of their buildsystem.

Fix that with a dirty hack: undefine the macro before defining it.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Alistair Francis <alistair.francis@xilinx.com>
[Alistair: Tested on ARMv7 (little endian) boot.]
Tested-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2016-11-01 09:37:32 +01:00 committed by Thomas Petazzoni
parent 2e29db7d97
commit bce4d0af42
1 changed files with 36 additions and 0 deletions
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36
package/xen/0002-xen-Rules.mk-fix-build-with-CFLAGS-from-environment.patch Normal file
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@ -0,0 +1,36 @@
From 2a310549aaeaba05f640ade43488bb893101ce4a Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN" <yann.morin.1998@free.fr>
Date: Sat, 29 Oct 2016 16:35:26 +0200
Subject: [PATCH] xen/Rules.mk: fix build with CFLAGS from environment
When CFLAGS are passed from the environment, the first-level make
invocation will append -D__OBJECT_FILE__ to it, then call a second
make invocation, that will have those new CFLAGS in its environment,
but will also append -D__OBJECT_FILE__ to those.
Then, the compiler fails because __OBEJECT_FILE__ is defined twice.
Just undefine it before defining it again, as a *workaround* to this
issue.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
---
xen/Rules.mk | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/Rules.mk b/xen/Rules.mk
index a9fda71..09ccbfa 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -49,7 +49,7 @@ ALL_OBJS-$(CONFIG_CRYPTO) += $(BASEDIR)/crypto/built_in.o
CFLAGS += -nostdinc -fno-builtin -fno-common
CFLAGS += -Werror -Wredundant-decls -Wno-pointer-arith
CFLAGS += -pipe -g -D__XEN__ -include $(BASEDIR)/include/xen/config.h
-CFLAGS += '-D__OBJECT_FILE__="$@"'
+CFLAGS += -U__OBJECT_FILE__ '-D__OBJECT_FILE__="$@"'
ifneq ($(clang),y)
# Clang doesn't understand this command line argument, and doesn't appear to
--
2.7.4