Re: [Qemu-devel] [PATCH] configure: Work-around a bug in libiscsi 1.9.0 when used in gnu99 mode

[Thomas Huth <thuth@redhat.com>]

On 2019-01-14 15:31, Philippe Mathieu-Daudé wrote:
> On 1/14/19 2:46 PM, Thomas Huth wrote:
>> The header "scsi-lowlevel.h" of libiscsi 1.9.0 contains some bad
>> "inline" prototype definitions which GCC refuses to compile in its
>> gnu99 mode:
>>
>> In file included from block/iscsi.c:52:0:
>> /usr/include/iscsi/scsi-lowlevel.h:810:13: error: inline function
>> ‘scsi_set_uint16’ declared but never defined [-Werror]
>>  inline void scsi_set_uint16(unsigned char *c, uint16_t val);
>>              ^
>> /usr/include/iscsi/scsi-lowlevel.h:809:13: error: inline function
>> ‘scsi_set_uint32’ declared but never defined [-Werror]
>>  inline void scsi_set_uint32(unsigned char *c, uint32_t val);
>>              ^
>>
>> This has been fixed by upstream libiscsi in version 1.10.0 (see
>> https://github.com/sahlberg/libiscsi/commit/7692027d6c11 ), but
>> since we still want to support 1.9.0 for CentOS 7 / RHEL7, we
>> have to work-around the issue by compiling with "-fgnu89-inline"
>> in this case instead.
>>
>> Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>  configure | 5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> diff --git a/configure b/configure
>> index 2b9ba7d..aa80c17 100755
>> --- a/configure
>> +++ b/configure
>> @@ -4562,6 +4562,11 @@ if test "$libiscsi" != "no" ; then
>>      libiscsi="yes"
>>      libiscsi_cflags=$($pkg_config --cflags libiscsi)
>>      libiscsi_libs=$($pkg_config --libs libiscsi)
>> +    if $pkg_config --exact-version==1.9.0 libiscsi; then
> 
> The first offending commit is d327ab09c which got included in 1.8.0, so
> using "exact" is not correct.
We require at least version 1.9.0, so the only version which can have
this problem when compiling QEMU is 1.9.0.

 Thomas