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Success in building x86info under GNU/Hurd


From: Svante Signell
Subject: Success in building x86info under GNU/Hurd
Date: Sat, 29 Jan 2011 17:15:37 +0100

Hi, when building x86info under GNU/Hurd (and according to the web other
packages like erlang, see Debian bug ##527589) functions like
__CPU_ZERO_S and __CPU_SET_S are not defined causing a build error. 

Tracing it back to the header files I found that /usr/include/sched.h
from libc6-dev/libc0.3-dev are identical on Linux and Hurd but
not /usr/include/bits/sched.h.  Attached is a diff between these files.
In the Linux version of the file the for Hurd missing functions are
properly defined, and it looks like the Hurd version is outdated. 

Exchanging the Hurd header with the Linux header file made x86info
build. Adding the hurd-i386 to the Debian .dsc and control files enabled
x86info package to build :-) The only problem to install
x86info_1.25-1_hurd-i386.deb is the dependency of makedev which
conflicts with Hurd or udev which is not available for Hurd.

One small problem was found during the build:
x86info.o: In function `bind_cpu':
cpuid.o: In function `native_cpuid':
/home/srs/DEBs/x86info-1.25/x86info.h:186: warning: warning:
sched_getaffinity is not implemented and will always fail
/home/srs/DEBs/x86info-1.25/x86info.h:189: warning: warning:
sched_setaffinity is not implemented and will always fail

However trying the x86info command under qemu/hurd gave the following
result:

x86info v1.25.  Dave Jones 2001-2009
Feedback to <address@hidden>.

Found 1 CPU
--------------------------------------------------------------------------
EFamily: 0 EModel: 0 Family: 6 Model: 3 Stepping: 3
CPU Model: Pentium II (Klamath) [C0]
Type: 0 (Original OEM)  Brand: 0 (Unsupported)
Number of cores per physical package=1
Number of logical processors per socket=1
Number of logical processors per core=1
APIC ID: 0x0    Package: 0  Core: 0   SMT ID 0

Attachment: hurd-linux-bits-sched.h.diff
Description: Text Data


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