[libvirt] [PATCH] build: avoid non-portable byte-swapping

[Eric Blake]

On 09/18/2012 02:54 PM, Peter Krempa wrote:
> On 09/18/12 21:55, Eric Blake wrote:
>> Commit 0fc89098 used functions only available on glibc, completely
>> botched 32-bit environments, and risked SIGBUS due to unaligned
>> memory access on platforms that aren't as forgiving as x86_64.
>>
>> * bootstrap.conf (gnulib_modules): Import ffsl.
>> * src/util/bitmap.c (includes): Use <strings.h> for ffsl.
>> (virBitmapNewData, virBitmapToData): Avoid 64-bit assumptions and
>> non-portable functions.
>> ---
>>
>> I wish I could push this under the build-breaker rule, but it is
>> not quite trivial enough.
> 
> Indeed. Bit magic never was trivial :).
> 

> 
> ACK. If there isn't a bug in my "brain simulation unit" then this should
> work as intended.

Thanks; pushed.

With this, a cross-build to mingw gets further (it was failing for
undefined functions, and now fails on:

  CC     libvirt_util_la-virdbus.lo
../../src/util/virdbus.c: In function 'virDBusAddWatch':
../../src/util/virdbus.c:149:5: error: 'dbus_watch_get_fd' is deprecated
(declared at /usr/include/dbus-1.0/dbus/dbus-connection.h:450)
[-Werror=deprecated-declarations]

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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