From 2a310549aaeaba05f640ade43488bb893101ce4a Mon Sep 17 00:00:00 2001
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From: "Yann E. MORIN" <yann.morin.1998@free.fr>
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Date: Sat, 29 Oct 2016 16:35:26 +0200
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Subject: [PATCH] xen/Rules.mk: fix build with CFLAGS from environment
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When CFLAGS are passed from the environment, the first-level make
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invocation will append -D__OBJECT_FILE__ to it, then call a second
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make invocation, that will have those new CFLAGS in its environment,
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but will also append -D__OBJECT_FILE__ to those.
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Then, the compiler fails because __OBEJECT_FILE__ is defined twice.
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Just undefine it before defining it again, as a *workaround* to this
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issue.
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Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
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---
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xen/Rules.mk | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/xen/Rules.mk b/xen/Rules.mk
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index a9fda71..09ccbfa 100644
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--- a/xen/Rules.mk
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+++ b/xen/Rules.mk
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@@ -49,7 +49,7 @@ ALL_OBJS-$(CONFIG_CRYPTO) += $(BASEDIR)/crypto/built_in.o
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CFLAGS += -nostdinc -fno-builtin -fno-common
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CFLAGS += -Werror -Wredundant-decls -Wno-pointer-arith
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CFLAGS += -pipe -g -D__XEN__ -include $(BASEDIR)/include/xen/config.h
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-CFLAGS += '-D__OBJECT_FILE__="$@"'
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+CFLAGS += -U__OBJECT_FILE__ '-D__OBJECT_FILE__="$@"'
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ifneq ($(clang),y)
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# Clang doesn't understand this command line argument, and doesn't appear to
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--
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2.7.4
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