Re: [Xen-devel] x86_emulate/x86_emulate.c:2105: warning: comparison is always false due to limited range of data type

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

Hi Keir,

Thanks ;)  I guess it will build fine for x86_64 but not for x86_32
due to int64_t?

I will test again after you update the fix in
http://xenbits.xensource.com/staging/xen-4.0-testing.hg?

Kindest regards,
Giam Teck Choon


On Mon, Nov 1, 2010 at 3:04 AM, Keir Fraser <keir@xxxxxxx> wrote:
> Clever compiler. Should be fixed by xen-4.0-testing:21378.
>
>  Thanks,
>  Keir
>
> On 31/10/2010 18:38, "Teck Choon Giam" <giamteckchoon@xxxxxxxxx> wrote:
>
>> Hi,
>>
>> Changeset 21377 in xen-4.0-testing.hg compile error:
>>
>> gcc -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
>> -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386
>> -mtune=generic -fasynchronous-unwind-tables -O1
>> -fno-omit-frame-pointer -fno-optimize-sibling-calls -m32 -march=i686
>> -g -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
>> -Wno-unused-value -Wdeclaration-after-statement  -O1
>> -fno-omit-frame-pointer -fno-optimize-sibling-calls -m32 -march=i686
>> -g -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
>> -Wno-unused-value -Wdeclaration-after-statement  -O1
>> -fno-omit-frame-pointer -fno-optimize-sibling-calls -m32 -march=i686
>> -g -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
>> -Wno-unused-value -Wdeclaration-after-statement  -nostdinc
>> -fno-builtin -fno-common -iwithprefix include -Werror
>> -Wno-pointer-arith -pipe
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-generic
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-default
>> -msoft-float -fno-stack-protector -fno-exceptions -g -D__XEN__
>> -DVERBOSE -fno-omit-frame-pointer -DCONFIG_FRAME_POINTER -MMD -MF
>> .xen.d -O1 -fno-omit-frame-pointer -fno-optimize-sibling-calls -m32
>> -march=i686 -g -fno-strict-aliasing -std=gnu99 -Wall
>> -Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement
>> -nostdinc -fno-builtin -fno-common -iwithprefix include -Werror
>> -Wno-pointer-arith -pipe
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-generic
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-default
>> -msoft-float -fno-stack-protector -fno-exceptions -g -D__XEN__
>> -DVERBOSE -fno-omit-frame-pointer -DCONFIG_FRAME_POINTER -MMD -MF
>> .built_in.o.d -O1 -fno-omit-frame-pointer -fno-optimize-sibling-calls
>> -m32 -march=i686 -g -fno-strict-aliasing -std=gnu99 -Wall
>> -Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement
>> -nostdinc -fno-builtin -fno-common -iwithprefix include -Werror
>> -Wno-pointer-arith -pipe
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-generic
>> -I/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/include/asm-x86/mach-default
>> -msoft-float -fno-stack-protector -fno-exceptions -g -D__XEN__
>> -DVERBOSE -fno-omit-frame-pointer -DCONFIG_FRAME_POINTER -MMD -MF
>> .x86_emulate.o.d -c x86_emulate.c -o x86_emulate.o
>> cc1: warnings being treated as errors
>> In file included from x86_emulate.c:17:
>> x86_emulate/x86_emulate.c: In function 'x86_emulate':
>> x86_emulate/x86_emulate.c:2105: warning: comparison is always false
>> due to limited range of data type
>> make[4]: *** [x86_emulate.o] Error 1
>> make[4]: Leaving directory
>> `/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/arch/x86'
>> make[3]: ***
>> [/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/arch/x86/built_in.o]
>> Error 2
>> make[3]: Leaving directory
>> `/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/arch/x86'
>> make[2]: *** [/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen/xen] Error 2
>> make[2]: Leaving directory `/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen'
>> make[1]: *** [install] Error 2
>> make[1]: Leaving directory `/builddir/build/BUILD/xen-4.0.2-rc1-pre-src/xen'
>> make: *** [install-xen] Error 2
>>
>> Thanks.
>>
>> Kindest regards,
>> Giam Teck Choon
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>
>
>

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