[Xen-devel] [PATCH for-4.8] tools/tests/x86_emulator: Pass -no-pie -fno-pic to gcc

[Ian Jackson <ian.jackson@xxxxxxxxxx>]

[resending with slightly improved headers]

The current build fails with GCC6 on Debian sid (unstable):

 /tmp/ccqjaueF.s: Assembler messages:
 /tmp/ccqjaueF.s:3713: Error: missing or invalid displacement expression 
`vmovd_to_reg_len@GOT'

This is due to the combination of GCC6, and Debian's decision to
enable some hardening flags by default (to try to make runtime
addresses less predictable):
  https://wiki.debian.org/Hardening/PIEByDefaultTransition

This is of no benefit for the x86 instruction emulator test, which is
a rebuild of the emulator code for testing purposes only.  So pass
options to disable this.

These options will be no-ops if they are the same as the compiler
default.

Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxx>
CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/tests/x86_emulator/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/tests/x86_emulator/Makefile 
b/tools/tests/x86_emulator/Makefile
index 13ace9a..6281fdf 100644
--- a/tools/tests/x86_emulator/Makefile
+++ b/tools/tests/x86_emulator/Makefile
@@ -44,6 +44,7 @@ x86_emulate/x86_emulate.c x86_emulate/x86_emulate.h:
        [ -L x86_emulate ] || ln -sf $(XEN_ROOT)/xen/arch/x86/x86_emulate .
 
 HOSTCFLAGS += $(CFLAGS_xeninclude)
+HOSTCFLAGS += -no-pie -fno-pic
 
 x86_emulate.o: x86_emulate.c x86_emulate/x86_emulate.c 
x86_emulate/x86_emulate.h
        $(HOSTCC) $(HOSTCFLAGS) -c -g -o $@ $<
-- 
2.10.1


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