Re: v3.18-rc5 build failure on ppc64 in Documentation/mic/mpssd/mpssd.o

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[ adding John to CC ]

On Wed, 19 Nov 2014, Seth Jennings wrote:

> One or more in the following commit set in the 3.18 merge window is causing
> build failure on ppc64 with the default config:
> 
> 7b345771ba921361b318e95bf21b257c65ac141c Documentation: update include path for mpssd
> 8c2b0dc83d9840da4d993a5dbb15c5974ad5a188 Documentation: support glibc versions without htole macros
> 6ab0e475f1f38b6be90aff4ef3ebf928c4a73dc8 Documentation: fix misc. warnings
> adb19fb66eeebac07fe37d968725bb8906dadb8e Documentation: add makefiles for more targets
> 
> Building v3.18-rc5 and I have glibc 2.17.
> 
> The problem is that for big endian, the htole* macros are not simple compile
> time transforms by the precompiler, but rather block code that must be executed
> in function context.
> 
> Build errors:
> ===
>   HOSTCC  Documentation/mic/mpssd/mpssd.o
> In file included from /usr/include/bits/byteswap.h:34:0,
>                  from /usr/include/endian.h:60,
>                  from /usr/include/bits/waitstatus.h:64,
>                  from /usr/include/stdlib.h:42,
>                  from Documentation/mic/mpssd/mpssd.c:23:
> Documentation/mic/mpssd/mpssd.c:93:10: error: braced-group within expression allowed only inside a function
>    .num = htole16(MIC_VRING_ENTRIES),
>           ^
> Documentation/mic/mpssd/mpssd.c:96:10: error: braced-group within expression allowed only inside a function
>    .num = htole16(MIC_VRING_ENTRIES),
>           ^
> Documentation/mic/mpssd/mpssd.c:113:10: error: braced-group within expression allowed only inside a function
>    .num = htole16(MIC_VRING_ENTRIES),
>           ^
> Documentation/mic/mpssd/mpssd.c:116:10: error: braced-group within expression allowed only inside a function
>    .num = htole16(MIC_VRING_ENTRIES),
>           ^
> Documentation/mic/mpssd/mpssd.c:119:3: error: initializer element is not constant
>    .host_features = htole32(
>    ^
> Documentation/mic/mpssd/mpssd.c:119:3: error: (near initialization for ‘virtnet_dev_page.host_features’)
> In file included from /usr/include/bits/byteswap.h:34:0,
>                  from /usr/include/endian.h:60,
>                  from /usr/include/bits/waitstatus.h:64,
>                  from /usr/include/stdlib.h:42,
>                  from Documentation/mic/mpssd/mpssd.c:23:
> Documentation/mic/mpssd/mpssd.c:146:10: error: braced-group within expression allowed only inside a function
>    .num = htole16(MIC_VRING_ENTRIES),
>           ^
> Documentation/mic/mpssd/mpssd.c:149:3: error: initializer element is not constant
>    htole32(1<<VIRTIO_BLK_F_SEG_MAX),
>    ^
> Documentation/mic/mpssd/mpssd.c:149:3: error: (near initialization for ‘virtblk_dev_page.host_features’)
> Documentation/mic/mpssd/mpssd.c:151:3: error: initializer element is not constant
>    .seg_max = htole32(MIC_VRING_ENTRIES - 2),
>    ^
> Documentation/mic/mpssd/mpssd.c:151:3: error: (near initialization for ‘virtblk_dev_page.blk_config.seg_max’)
> Documentation/mic/mpssd/mpssd.c:152:3: error: initializer element is not constant
>    .capacity = htole64(0),
>    ^
> Documentation/mic/mpssd/mpssd.c:152:3: error: (near initialization for ‘virtblk_dev_page.blk_config.capacity’)
> make[3]: *** [Documentation/mic/mpssd/mpssd.o] Error 1
> ===
> 
> Reverting the commits fixes the issue, however, a more targeted approach could
> just skip make on Documentation/mic/mpssd/ until the endianness issue is
> resolved. Or something else...
> 
> Thanks,
> Seth
> 

-- 
Jiri Kosina
SUSE Labs
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