Re: [Qemu-devel] [PULL 00/11] Misc changes for 2016-06-06

[Peter Maydell <peter.maydell@linaro.org>]

On 6 June 2016 at 18:35, Paolo Bonzini <pbonzini@redhat.com> wrote:
> The following changes since commit 76462405809d29bab65a3699686998ba124ab942:
>
>   Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20160606-1' into staging (2016-06-06 17:02:42 +0100)
>
> are available in the git repository at:
>
>   git://github.com/bonzini/qemu.git tags/for-upstream
>
> for you to fetch changes up to ada3d3ba63016bcd33c42f84bcc982a249768e36:
>
>   avx2 configure: Use primitives in test (2016-06-06 19:18:34 +0200)
>
> ----------------------------------------------------------------
> * max-ram-below-4g improvement (Gerd)
> * escc fix (xiaoqiang)
> * ESP fix (Prasad)
> * scsi-disk tweaks/fix (me)
> * PKGVERSION improvement (Fam)
> * -vnc man improvement (Robert)
> * AVX2 configure fixes (Dave)

Hi. I'm afraid this fails to build for me (x86-64 Linux, gcc).

I think this is the "trying to use the #pragma target("avx2") doesn't
work under ccache" problem again. (configure tests run not under ccache,
but the build proper does.) See
https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg05298.html
from last time we tried this...

Possibly it's just that you deleted the "requires gcc 4.9" check with
the comment that says "this doesn't work with older gcc", so now
we're again trying to do this on the older gcc where it doesn't work ;-)

Compiler errors below.


/home/petmay01/linaro/qemu-for-merges/util/cutils.c: In function
‘can_use_buffer_find_nonzero_offset_avx2’:
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:275:29: error:
‘__m256i’ undeclared (first use in this function)
                    * sizeof(AVX2_VECTYPE)) == 0
                             ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:275:29: note: each
undeclared identifier is reported only once for each function it
appears in
/home/petmay01/linaro/qemu-for-merges/util/cutils.c: In function
‘buffer_find_nonzero_offset_avx2’:
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:281:5: error:
unknown type name ‘__m256i’
     const AVX2_VECTYPE *p = buf;
     ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:282:5: error:
unknown type name ‘__m256i’
     const AVX2_VECTYPE zero = (AVX2_VECTYPE){0};
     ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:282:27: error:
‘__m256i’ undeclared (first use in this function)
     const AVX2_VECTYPE zero = (AVX2_VECTYPE){0};
                           ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:282:35: error:
expected ‘,’ or ‘;’ before ‘{’ token
     const AVX2_VECTYPE zero = (AVX2_VECTYPE){0};
                                   ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:292:9: error:
implicit declaration of function ‘_mm256_movemask_epi8’
[-Werror=implicit-function-declaration]
         if (!AVX2_ALL_EQ(p[i], zero)) {
         ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:292:9: error:
nested extern declaration of ‘_mm256_movemask_epi8’
[-Werror=nested-externs]
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:292:9: error:
implicit declaration of function ‘_mm256_cmpeq_epi8’
[-Werror=implicit-function-declaration]
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:292:9: error:
nested extern declaration of ‘_mm256_cmpeq_epi8’
[-Werror=nested-externs]
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:300:17: error:
expected ‘;’ before ‘tmp0’
         AVX2_VECTYPE tmp0 = AVX2_VEC_OR(p[i + 0], p[i + 1]);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:301:17: error:
expected ‘;’ before ‘tmp1’
         AVX2_VECTYPE tmp1 = AVX2_VEC_OR(p[i + 2], p[i + 3]);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:302:17: error:
expected ‘;’ before ‘tmp2’
         AVX2_VECTYPE tmp2 = AVX2_VEC_OR(p[i + 4], p[i + 5]);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:303:17: error:
expected ‘;’ before ‘tmp3’
         AVX2_VECTYPE tmp3 = AVX2_VEC_OR(p[i + 6], p[i + 7]);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:304:17: error:
expected ‘;’ before ‘tmp01’
         AVX2_VECTYPE tmp01 = AVX2_VEC_OR(tmp0, tmp1);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:305:17: error:
expected ‘;’ before ‘tmp23’
         AVX2_VECTYPE tmp23 = AVX2_VEC_OR(tmp2, tmp3);
                 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:306:9: error:
implicit declaration of function ‘_mm256_or_si256’
[-Werror=implicit-function-declaration]
         if (!AVX2_ALL_EQ(AVX2_VEC_OR(tmp01, tmp23), zero)) {
         ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:306:9: error:
nested extern declaration of ‘_mm256_or_si256’
[-Werror=nested-externs]
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:306:71: error:
‘tmp01’ undeclared (first use in this function)
         if (!AVX2_ALL_EQ(AVX2_VEC_OR(tmp01, tmp23), zero)) {
                                                                       ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:306:78: error:
‘tmp23’ undeclared (first use in this function)
         if (!AVX2_ALL_EQ(AVX2_VEC_OR(tmp01, tmp23), zero)) {
                                                                              ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c: In function
‘can_use_buffer_find_nonzero_offset_avx2’:
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:277:1: error:
control reaches end of non-void function [-Werror=return-type]
 }
 ^
/home/petmay01/linaro/qemu-for-merges/util/cutils.c: In function
‘buffer_find_nonzero_offset_avx2’:
/home/petmay01/linaro/qemu-for-merges/util/cutils.c:312:1: error:
control reaches end of non-void function [-Werror=return-type]
 }
 ^
cc1: all warnings being treated as errors


thanks
-- PMM