[libvirt] [PATCHv2] build: increase xz compression level

[Ján Tomko]

On Fri, Jun 24, 2016 at 02:30:54PM +0100, Daniel P. Berrange wrote:
>On Fri, Jun 24, 2016 at 03:07:01PM +0200, Ján Tomko wrote:
>> Increase the default compression level to 9 from 6.
>>
>> This also increases decompression memory requirements
>> from 9 MB to 65 MB.
>>
>> Also turn on verbosity.
>> ---
>>  Makefile.am | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> v2:
>>   also use -v
>>   move the setting to Makefile.am
>>
>> diff --git a/Makefile.am b/Makefile.am
>> index 4b4aad3..ef88067 100644
>> --- a/Makefile.am
>> +++ b/Makefile.am
>> @@ -22,6 +22,9 @@ GENHTML = genhtml
>>  SUBDIRS = . gnulib/lib include/libvirt src daemon tools docs gnulib/tests \
>>    tests po examples
>>
>> +XZ_OPT ?= -9ev
>> +export XZ_OPT
>
>This is a make variable, not shell, so 'export XZ_OPT' is not
>relevant AFAICT.
>

It does not work without export.

I don't know whether it's needed to propagate the value to a
sub-Makefile or automake expects it to be a shell variable when
executing the command:

tardir=libvirt-2.0.0 && tar --format=posix -chf - "$tardir" |
XZ_OPT=${XZ_OPT--e} xz -c >libvirt-2.0.0.tar.xz

Jan

>ACK if that line is removed.
>
>Regards,
>Daniel