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[Xen-devel] [PATCH] prepend the include path of libvixl header files

Currently the Makefile of disas/libvixl appends
-I$(SRC_PATH)/disas/libvixl to QEMU_CFLAGS. As a consequence C++ files
that #include "utils.h", such as disas/libvixl/a64/instructions-a64.cc,
are going to look for utils.h on all the other include paths first.

When building QEMU as part of the Xen make system, another unrelated
utils.h file is going to be chosen for inclusion, causing a build

In file included from disas/libvixl/a64/instructions-a64.cc:27:0:
/qemu/disas/libvixl/a64/instructions-a64.h:88:64: error:
ârawbits_to_floatâ was not declared in this scope
 const float kFP32PositiveInfinity = rawbits_to_float(0x7f800000);

Fix the problem by prepending (rather than appending) the libvixl
include path to QEMU_CFLAGS.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>


diff --git a/disas/libvixl/Makefile.objs b/disas/libvixl/Makefile.objs
index 0adb3ce..17e6565 100644
--- a/disas/libvixl/Makefile.objs
+++ b/disas/libvixl/Makefile.objs
@@ -3,6 +3,6 @@ libvixl_OBJS = utils.o \
                a64/decoder-a64.o \
-$(addprefix $(obj)/,$(libvixl_OBJS)): QEMU_CFLAGS += 
+$(addprefix $(obj)/,$(libvixl_OBJS)): QEMU_CFLAGS := 
-I$(SRC_PATH)/disas/libvixl $(QEMU_CFLAGS)
 common-obj-$(CONFIG_ARM_A64_DIS) += $(libvixl_OBJS)
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