[Buildroot] PowerPC: scsi/sg.h missing in glibc-2.18 / linux-headers-3.10.20 toolchain

[Arnout Vandecappelle]

On 24/03/14 19:43, Émeric Vigier wrote:
> Hi makers,
> 
> I struggled to cross-compile (powerpc) strace-4.8 with linux-headers-3.10.20
> and glibc-2.18.It does not find <scsi/sg.h> in my toolchain. Indeed there is
> none in my sysroot:
> 
> $ find output/ -path "*/scsi/sg.h"
> output/build/glibc-2.18/sysdeps/unix/sysv/linux/scsi/sg.h
> output/build/linux-headers-3.10.20/include/scsi/sg.h

 This is a known issue: linux-headers removes sg.h from the staging
directory. Normally this isn't an issue because glibc installs it again,
but if for whatever reason linux-headers gets reinstalled, it gets
removed again. You shouldn't get this issue with a clean build.

 See the thread at
http://thread.gmane.org/gmane.comp.lib.uclibc.buildroot/77571


 Regards,
 Arnout

> 
> I have a duplicate buildroot with linux-headers-3.2.52 and the same glibc.
> It succeeds to compile strace. Indeed headers are present in sysroot:
> 
> $ find output/ -path "*/scsi/sg.h"
> output/build/linux-headers-3.2.52/include/scsi/sg.h
> output/build/glibc-2.18/sysdeps/unix/sysv/linux/scsi/sg.h
> output/build/linux-3.2.x/include/scsi/sg.h
> output/host/usr/powerpc-buildroot-linux-gnu/sysroot/usr/include/scsi/sg.h
> 
> I checked linux API changes but nothing about SCSI:
> http://man7.org/tlpi/api_changes/index.html
> 
> I worked around this problem with a simple copy:
> $ cp output/build/glibc-2.18/sysdeps/unix/sysv/linux/scsi/sg.h \
>      output/host/usr/powerpc-buildroot-linux-gnu/sysroot/usr/incl
> 
> I'd like to know how to truly fix this issue. Is this a bug in the toolchain 
> cross-compilation?
> 
> thanks,
> Emeric
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-- 
Arnout Vandecappelle                          arnout at mind be
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